Join Now
International Automotive Technicians Network

P0171 Diagnostic Trouble Code Discussion for January 2009

Fuel System Lean (Bank 1)


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2006 Jeep Grand Cherokee Laredo 4.7L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J8HR48P7C
P0171: Fuel System Lean (Bank 1). Very hard start when cold, then start stall and will not take fuel on acceleration until warm - pops out of intake. Five spark plugs had the ground electrodes melted off and all eight plugs were white from heat. Will start immediately when cold with propane an...
January 02, 2009
1996 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34X7T
P0171: system too lean bank 1. hello i have this ford with p0171 and p0174 and i know that the mass air flow meter is a possible suspect at least when these code are on toyotas i have seen many times that the meter is a problem. i just need some paramitors and data stream values if anyone k...
January 03, 2009
1996 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD52Y0T
P0171: Fuel Trim System Lean (Bank 1). 96 Deville 4.6 codes P0171/P0174 air flow runs approximately 4 GPS at 650 RPMs long term fuel trim goes to 37% and locks there. Have blocked all vacuum passages, eleminated EGR, verified cam timing,tested compression,tested and substituted fuel,cleaned injecto...
January 05, 2009
2006 Jeep Grand Cherokee Laredo 4.7L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J8HR48P7C
P0171: Fuel System Lean (Bank 1). Very hard start when cold, then start stall and will not take fuel on acceleration until warm - pops out of intake. Five spark plugs had the ground electrodes melted off and all eight plugs were white from heat. Will start immediately when cold with propane an...
January 05, 2009
1996 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD52Y0T
P0171: Fuel Trim System Lean (Bank 1). 96 Deville 4.6 codes P0171/P0174 air flow runs approximately 4 GPS at 650 RPMs long term fuel trim goes to 37% and locks there. Have blocked all vacuum passages, eleminated EGR, verified cam timing,tested compression,tested and substituted fuel,cleaned injecto...
January 06, 2009
2000 Ford F-150 Lariat 5.4L Excessive Emissions, Poor Idle Quality, Stall VIN: 1FTRX18L2Y
P0171: lean bank 1. thanks in advance folks. we have had this F150 in a couple of times. customer states that vehicle stalls when cold, at stop signs it idles rough, check engine light on. i did verify these conditions. outside air temp is around 10 degrees. vehicle sat over nigh...
January 07, 2009
2003 Saturn L200 2.2L MIL Lamp on VIN: 1G8JU54F73
P0171: Fuel Trim System Lean (Bank 1). ... L200 in the shop, it came in with an ses light on and "sounded loud". First obvious problem is the cooling fans on high when ever car is running. Started and stalled twice from cold. Scanned PCM codes, P0171 and p1...
January 07, 2009
1997 Ford F-150 Lariat 5.4L MIL Lamp on VIN: 1FTEX17L9V
P0171: system to lean - bank 1. replaced maf sensor a couple weeks ago and light came back on two days later...didn't know if someone had been down this road before and could tell me what to look for...smoke tested vehicle and could find no intake leaks...any help would be appreciated.
January 08, 2009
1999 Ford E-250 Econoline 4.2L MIL Lamp on VIN: 1FTNE2428X
P0171: system too lean bank 1. hi everyone vehicle came in for check engine light 171, 174 codes in memory. check for leaks none found. has good fuel pressure. cleaned mass air flow sensor. van ran great. vehicle came back 3 days later same codes. replaced maf and on start up it ran rough,...
January 08, 2009
2002 Volvo S80 2.9 2.9L No Start VIN: VV1TS92D82
P0171: System Too Lean Bank 1. Hi all,first let me say this is a post for a friend.He tell me the car was running when it came in (badly)they did basic maintenance,and put the codes.Decided to replace coil pack ,Var.Val.timimg solenoid,and oil trap.Then the car would start and die,washed th...
January 10, 2009
1995 Buick Riviera 3.8L Excessive Emissions, Poor Idle Quality, Surge, Stall, Misfire VIN: 1G4GD2210S
P0171: fuel trim lean. vehicle came in with used engine installed from other shop, vehicle will start after multiple tries, will barely hold idle with multiple misfires, poor emmisions, no acceleration at all, acts as if cat plugged, or fuel pressure low, fuel pressure 41psi at idle...
January 12, 2009
2000 Chevrolet Express 2500 5.7L Cuts out, MIL Lamp on VIN: 1GCGG25R3Y
P0171: Fuel Trim System Lean (Bank 1). This van dropped in this morning and was running perfect in every way except the CEL was on. The men said it would buck and cut out very intermittently. I checked and found the codes listed. The freeze frame data varied very little on the fuel trim from code t...
January 12, 2009
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5144Y
P0171: Bank one lean. vehicle returns the following week, seems the light only sets when it''s cold out, rechecked my work no intake leaks, no vacuum leaks o2s working well pulse width equal installed a known good mass air flow sensor,light returns again pops on when cold, I took t...
January 12, 2009
1995 Toyota Previa DX 2.4L MIL Lamp on VIN: JT3AC23S2S
P0171: lean code. have been fighting this one to no avail. vehicle was at local dealer before we got to it for same thing (3 times). they replaced an intake tube at mass air flow sensor. code returned on his way home from dealer. they then cleaned his maf sensor. code returned ...
January 13, 2009
2000 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T6Y
P0171: Fuel System Too Lean (Bank 1). We have tested for vacumn leaks and R&R'd the intake to inspect the gasket for leakage. The LTFT remains a 45% until the throttle plate comes off idle.
January 13, 2009
2002 Volkswagen Beetle GLS 1.8L MIL Lamp on VIN: 3VWCD21C92
P0171: fuel system lean. To all; Thanks in advance. I have this vw that I worked on a couple of weeks ago. It had the same code and a large vacuum leak from the big crankcase breather hose. The hose had turned to mush like they all do. I replaced the hose and cleared the codes. I was ...
January 13, 2009
2001 Dodge Durango SLT 4.7L MIL Lamp on VIN: 1B4HS28N61
P0171: Fuel System Lean (Bank 1). ... keeps poping the P0171 code with out me being able to find the cause. I have found that the power steering pressure switch was pumping fliud into the wireing harness ( apparently this is quite common). So I fixed that ran two new signal wires to the comput...
January 14, 2009
2006 GMC Sierra 1500 WT 4.8L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, sluggish VIN: 3GTEC14V76
P0171: Fuel Trim System Lean (Bank 1). Customer complains of rough idle, sluggish, cel on. Above listed codes are confirmed. Misfire counters are very high on cyls. # 1,3,5,7, very low on #2,4,6,8.. HC slightly high O2 high at tailpipe, C0 low. Can enrich to get O2 to go high but at idle, O2 at .03...
January 14, 2009
2003 Jeep Wrangler Sahara 4.0L MIL Lamp on VIN: 1J4FA59S33
P0171: Fuel System Lean (Bank 1). jeep has a p0171 lean code I have found no vacuum leaks replaced intake and exhaust gaskets and check manifold for cracks , also have flushed injectors . Code keeps returning any help appreciated
January 14, 2009
1999 Toyota Solara SE 3.0L Misfire, MIL Lamp on VIN: 2TICF28P7X
This beast is very intermintant. When it the problem occurs it's like a switch. It will occur at start up or while driving down the road. The fuel trim #s are high only on one bank. Short FT #1 19.4 Short FT 52.2. the other bank SFT -7.9 lft -0.1. When there i...
January 14, 2009
2003 Volkswagen Passat GLS 1.8L Misfire, MIL Lamp on VIN: WVWPD63B23
P0171: system lean bank 1. ... when vehicle has come to a stop. This mostly after car is driven and stopped for approx. 20 minutes and then driven again.Also states check engine light will flash.In addition to codes stated I also have codes P0300-p030...
January 14, 2009
2001 Ford F-150 King Ranch 5.4L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FTRW08L71
P0171: lean bank 1. Good mourning guys I have this 01 f150 that is giving me hope for early retirement. Well came in with all of the codes listed. Found LTFT lean and cleaned MAF and reset,LTFT returned to specs.In mod $6 I had a misfire on every cylinder. Next took if for a test...
January 15, 2009
2001 Ford Escape XLT 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMYU03191
P0171: bank one lean. ... we have a 01 ford escape with a 3.o v6 auto trans.vehicle came in on the hook and smelled like fuel.scantest revealed 6 trouble codes p1151,po171,po174,po302,po304,po306. tech has checked fuel press and filter ,injector pulse ,and spay pattern. all are goo...
January 15, 2009
2003 Nissan Frontier XE 3.3L MIL Lamp on VIN: 1N6ED29Y83
P0171: Fuel Trim Lean (Bank 1). ... week with truck when i couldn't get readiness test to set.. and had code p0328 for pending knock sensor. we got it set readiness codes and it went thru emmision. i cleared the codes and we drove it for awhile. now the mil is on and i am getting 2 pending c...
January 15, 2009
2000 Ford Ranger XL 3.0L MIL Lamp on VIN: 1FTZR15V2Y
P0171: system lean bank 1. Hello, fellow junk fixers(sorry, TECHS) We have one here eating our lunch and leaving no tip. As per related repair history, you can assume our bosses are getting pretty tired of us "throwing parts" at this truck. Close visual inspection and some guess...
January 16, 2009
1999 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22KXX
P0171: Fuel System Too Lean (Bank 1). What is the correct PID range for the A/F ratio sensor? I know that I need to the this sensor as per a TSB. I do understand that the range is different from a normal O2 sensor.
January 16, 2009
2001 Ford F-150 XL 4.2L MIL Lamp on VIN: 1FTZF07291
P0171: Lean Bank 1. Replaced upper intake gaskets and isolator bolts.Freeze Frame Data show cold @ 168F. vehicle still runs lean. Bank 1 show to be running leaner than 2.So we swapped injectors. Results the same. Fuel pump at 30 Psi@idle. 35Psi@ accel.KOEO 42psi.Cleaned injectors...
January 17, 2009
2002 GMC Sierra 1500 SL 5.3L Hesitation, Cuts out, MIL Lamp on VIN: 2GTEK19T32
P0171: Fuel Trim System Lean (Bank 1). thank you ahead of time for your help i got a 02 sierra here witha running issue when you step on gas it falls on its face and cant get outa its own way maf has been replaced,all 4 o2s replaced, 02 switch fine untill you give it gas and then truck boggs down e...
January 22, 2009
2004 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Flooding VIN: 1G1JC52F54
P0171: Fuel System Lean (Bank 1). Customer complaint of miss @ idle. Verified after start up when engine idles down it will act like it is loading up on fuel, O2 sensor remains in high 800 - 900 mlvolts, fuel trim LT -14 to-18 ST -10 to -18. Vacuum starts @ 15hg drops to 9-10hg when engine is ...
January 27, 2009
2004 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTPX14514
repaired a previous attempt to replace CHT sensor and haness. had code for this CHT. removed intake, replaced gaskets with oe, replace CHT sensor, replaced CHT sensor harness connector. all joints soldered. truck runs great untill you "shower down" on ...
January 27, 2009
2004 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTPX14514
repaired a previous attempt to replace CHT sensor and haness. had code for this CHT. removed intake, replaced gaskets with oe, replace CHT sensor, replaced CHT sensor harness connector. all joints soldered. truck runs great untill you "shower down" on ...
January 28, 2009
2003 Jaguar XK8 4.2L MIL Lamp on VIN: SAJDA42C73
P0171: lean system Bank 1. ... codes(P0171 and P0174)after customer had it to several other shops. They failed and I am not only trying to gain her confidence but resolve her car troubles as well. The engine is sound, fuel pressure/volume is good and a "New" AMM restored alot of...
January 28, 2009
2000 Chevrolet Express 2500 5.7L Cuts out, MIL Lamp on VIN: 1GCGG25R3Y
P0171: Fuel Trim System Lean (Bank 1). This van dropped in this morning and was running perfect in every way except the CEL was on. The men said it would buck and cut out very intermittently. I checked and found the codes listed. The freeze frame data varied very little on the fuel trim from code t...
January 30, 2009
2001 Ford F-150 King Ranch 5.4L Poor Idle Quality, MIL Lamp on VIN: 1FTRW08L51
P0171: lean bank one. Guy from parts store owns truck , he has replaced about anything they stock . Truck came in with po171, lean . Rough idle . I motorvaced injectors . Fuel trims were -+3. ran great . Came back 100 mile later, po171 again . Check for vac leaks , smoked it severa...
January 30, 2009
2006 Jeep Grand Cherokee Laredo 4.7L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J8HR48P7C
P0171: Fuel System Lean (Bank 1). Very hard start when cold, then start stall and will not take fuel on acceleration until warm - pops out of intake. Five spark plugs had the ground electrodes melted off and all eight plugs were white from heat. Will start immediately when cold with propane an...
January 02, 2009
1996 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34X7T
P0171: system too lean bank 1. hello i have this ford with p0171 and p0174 and i know that the mass air flow meter is a possible suspect at least when these code are on toyotas i have seen many times that the meter is a problem. i just need some paramitors and data stream values if anyone k...
January 03, 2009
1996 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD52Y0T
P0171: Fuel Trim System Lean (Bank 1). 96 Deville 4.6 codes P0171/P0174 air flow runs approximately 4 GPS at 650 RPMs long term fuel trim goes to 37% and locks there. Have blocked all vacuum passages, eleminated EGR, verified cam timing,tested compression,tested and substituted fuel,cleaned injecto...
January 05, 2009
2006 Jeep Grand Cherokee Laredo 4.7L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J8HR48P7C
P0171: Fuel System Lean (Bank 1). Very hard start when cold, then start stall and will not take fuel on acceleration until warm - pops out of intake. Five spark plugs had the ground electrodes melted off and all eight plugs were white from heat. Will start immediately when cold with propane an...
January 05, 2009
1996 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD52Y0T
P0171: Fuel Trim System Lean (Bank 1). 96 Deville 4.6 codes P0171/P0174 air flow runs approximately 4 GPS at 650 RPMs long term fuel trim goes to 37% and locks there. Have blocked all vacuum passages, eleminated EGR, verified cam timing,tested compression,tested and substituted fuel,cleaned injecto...
January 06, 2009
2000 Ford F-150 Lariat 5.4L Excessive Emissions, Poor Idle Quality, Stall VIN: 1FTRX18L2Y
P0171: lean bank 1. thanks in advance folks. we have had this F150 in a couple of times. customer states that vehicle stalls when cold, at stop signs it idles rough, check engine light on. i did verify these conditions. outside air temp is around 10 degrees. vehicle sat over nigh...
January 07, 2009
2003 Saturn L200 2.2L MIL Lamp on VIN: 1G8JU54F73
P0171: Fuel Trim System Lean (Bank 1). ... L200 in the shop, it came in with an ses light on and "sounded loud". First obvious problem is the cooling fans on high when ever car is running. Started and stalled twice from cold. Scanned PCM codes, P0171 and p1...
January 07, 2009
1997 Ford F-150 Lariat 5.4L MIL Lamp on VIN: 1FTEX17L9V
P0171: system to lean - bank 1. replaced maf sensor a couple weeks ago and light came back on two days later...didn't know if someone had been down this road before and could tell me what to look for...smoke tested vehicle and could find no intake leaks...any help would be appreciated.
January 08, 2009
1999 Ford E-250 Econoline 4.2L MIL Lamp on VIN: 1FTNE2428X
P0171: system too lean bank 1. hi everyone vehicle came in for check engine light 171, 174 codes in memory. check for leaks none found. has good fuel pressure. cleaned mass air flow sensor. van ran great. vehicle came back 3 days later same codes. replaced maf and on start up it ran rough,...
January 08, 2009
2002 Volvo S80 2.9 2.9L No Start VIN: VV1TS92D82
P0171: System Too Lean Bank 1. Hi all,first let me say this is a post for a friend.He tell me the car was running when it came in (badly)they did basic maintenance,and put the codes.Decided to replace coil pack ,Var.Val.timimg solenoid,and oil trap.Then the car would start and die,washed th...
January 10, 2009
1995 Buick Riviera 3.8L Excessive Emissions, Poor Idle Quality, Surge, Stall, Misfire VIN: 1G4GD2210S
P0171: fuel trim lean. vehicle came in with used engine installed from other shop, vehicle will start after multiple tries, will barely hold idle with multiple misfires, poor emmisions, no acceleration at all, acts as if cat plugged, or fuel pressure low, fuel pressure 41psi at idle...
January 12, 2009
2000 Chevrolet Express 2500 5.7L Cuts out, MIL Lamp on VIN: 1GCGG25R3Y
P0171: Fuel Trim System Lean (Bank 1). This van dropped in this morning and was running perfect in every way except the CEL was on. The men said it would buck and cut out very intermittently. I checked and found the codes listed. The freeze frame data varied very little on the fuel trim from code t...
January 12, 2009
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5144Y
P0171: Bank one lean. vehicle returns the following week, seems the light only sets when it''s cold out, rechecked my work no intake leaks, no vacuum leaks o2s working well pulse width equal installed a known good mass air flow sensor,light returns again pops on when cold, I took t...
January 12, 2009
1995 Toyota Previa DX 2.4L MIL Lamp on VIN: JT3AC23S2S
P0171: lean code. have been fighting this one to no avail. vehicle was at local dealer before we got to it for same thing (3 times). they replaced an intake tube at mass air flow sensor. code returned on his way home from dealer. they then cleaned his maf sensor. code returned ...
January 13, 2009
2000 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T6Y
P0171: Fuel System Too Lean (Bank 1). We have tested for vacumn leaks and R&R'd the intake to inspect the gasket for leakage. The LTFT remains a 45% until the throttle plate comes off idle.
January 13, 2009
2002 Volkswagen Beetle GLS 1.8L MIL Lamp on VIN: 3VWCD21C92
P0171: fuel system lean. To all; Thanks in advance. I have this vw that I worked on a couple of weeks ago. It had the same code and a large vacuum leak from the big crankcase breather hose. The hose had turned to mush like they all do. I replaced the hose and cleared the codes. I was ...
January 13, 2009
2001 Dodge Durango SLT 4.7L MIL Lamp on VIN: 1B4HS28N61
P0171: Fuel System Lean (Bank 1). ... keeps poping the P0171 code with out me being able to find the cause. I have found that the power steering pressure switch was pumping fliud into the wireing harness ( apparently this is quite common). So I fixed that ran two new signal wires to the comput...
January 14, 2009
2006 GMC Sierra 1500 WT 4.8L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, sluggish VIN: 3GTEC14V76
P0171: Fuel Trim System Lean (Bank 1). Customer complains of rough idle, sluggish, cel on. Above listed codes are confirmed. Misfire counters are very high on cyls. # 1,3,5,7, very low on #2,4,6,8.. HC slightly high O2 high at tailpipe, C0 low. Can enrich to get O2 to go high but at idle, O2 at .03...
January 14, 2009
2003 Jeep Wrangler Sahara 4.0L MIL Lamp on VIN: 1J4FA59S33
P0171: Fuel System Lean (Bank 1). jeep has a p0171 lean code I have found no vacuum leaks replaced intake and exhaust gaskets and check manifold for cracks , also have flushed injectors . Code keeps returning any help appreciated
January 14, 2009
1999 Toyota Solara SE 3.0L Misfire, MIL Lamp on VIN: 2TICF28P7X
This beast is very intermintant. When it the problem occurs it's like a switch. It will occur at start up or while driving down the road. The fuel trim #s are high only on one bank. Short FT #1 19.4 Short FT 52.2. the other bank SFT -7.9 lft -0.1. When there i...
January 14, 2009
2003 Volkswagen Passat GLS 1.8L Misfire, MIL Lamp on VIN: WVWPD63B23
P0171: system lean bank 1. ... when vehicle has come to a stop. This mostly after car is driven and stopped for approx. 20 minutes and then driven again.Also states check engine light will flash.In addition to codes stated I also have codes P0300-p030...
January 14, 2009
2001 Ford F-150 King Ranch 5.4L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FTRW08L71
P0171: lean bank 1. Good mourning guys I have this 01 f150 that is giving me hope for early retirement. Well came in with all of the codes listed. Found LTFT lean and cleaned MAF and reset,LTFT returned to specs.In mod $6 I had a misfire on every cylinder. Next took if for a test...
January 15, 2009
2001 Ford Escape XLT 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMYU03191
P0171: bank one lean. ... we have a 01 ford escape with a 3.o v6 auto trans.vehicle came in on the hook and smelled like fuel.scantest revealed 6 trouble codes p1151,po171,po174,po302,po304,po306. tech has checked fuel press and filter ,injector pulse ,and spay pattern. all are goo...
January 15, 2009
2003 Nissan Frontier XE 3.3L MIL Lamp on VIN: 1N6ED29Y83
P0171: Fuel Trim Lean (Bank 1). ... week with truck when i couldn't get readiness test to set.. and had code p0328 for pending knock sensor. we got it set readiness codes and it went thru emmision. i cleared the codes and we drove it for awhile. now the mil is on and i am getting 2 pending c...
January 15, 2009
2000 Ford Ranger XL 3.0L MIL Lamp on VIN: 1FTZR15V2Y
P0171: system lean bank 1. Hello, fellow junk fixers(sorry, TECHS) We have one here eating our lunch and leaving no tip. As per related repair history, you can assume our bosses are getting pretty tired of us "throwing parts" at this truck. Close visual inspection and some guess...
January 16, 2009
1999 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22KXX
P0171: Fuel System Too Lean (Bank 1). What is the correct PID range for the A/F ratio sensor? I know that I need to the this sensor as per a TSB. I do understand that the range is different from a normal O2 sensor.
January 16, 2009
2001 Ford F-150 XL 4.2L MIL Lamp on VIN: 1FTZF07291
P0171: Lean Bank 1. Replaced upper intake gaskets and isolator bolts.Freeze Frame Data show cold @ 168F. vehicle still runs lean. Bank 1 show to be running leaner than 2.So we swapped injectors. Results the same. Fuel pump at 30 Psi@idle. 35Psi@ accel.KOEO 42psi.Cleaned injectors...
January 17, 2009
2002 GMC Sierra 1500 SL 5.3L Hesitation, Cuts out, MIL Lamp on VIN: 2GTEK19T32
P0171: Fuel Trim System Lean (Bank 1). thank you ahead of time for your help i got a 02 sierra here witha running issue when you step on gas it falls on its face and cant get outa its own way maf has been replaced,all 4 o2s replaced, 02 switch fine untill you give it gas and then truck boggs down e...
January 22, 2009
2004 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Flooding VIN: 1G1JC52F54
P0171: Fuel System Lean (Bank 1). Customer complaint of miss @ idle. Verified after start up when engine idles down it will act like it is loading up on fuel, O2 sensor remains in high 800 - 900 mlvolts, fuel trim LT -14 to-18 ST -10 to -18. Vacuum starts @ 15hg drops to 9-10hg when engine is ...
January 27, 2009
2004 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTPX14514
repaired a previous attempt to replace CHT sensor and haness. had code for this CHT. removed intake, replaced gaskets with oe, replace CHT sensor, replaced CHT sensor harness connector. all joints soldered. truck runs great untill you "shower down" on ...
January 27, 2009
2004 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTPX14514
repaired a previous attempt to replace CHT sensor and haness. had code for this CHT. removed intake, replaced gaskets with oe, replace CHT sensor, replaced CHT sensor harness connector. all joints soldered. truck runs great untill you "shower down" on ...
January 28, 2009
2003 Jaguar XK8 4.2L MIL Lamp on VIN: SAJDA42C73
P0171: lean system Bank 1. ... codes(P0171 and P0174)after customer had it to several other shops. They failed and I am not only trying to gain her confidence but resolve her car troubles as well. The engine is sound, fuel pressure/volume is good and a "New" AMM restored alot of...
January 28, 2009
2000 Chevrolet Express 2500 5.7L Cuts out, MIL Lamp on VIN: 1GCGG25R3Y
P0171: Fuel Trim System Lean (Bank 1). This van dropped in this morning and was running perfect in every way except the CEL was on. The men said it would buck and cut out very intermittently. I checked and found the codes listed. The freeze frame data varied very little on the fuel trim from code t...
January 30, 2009
2001 Ford F-150 King Ranch 5.4L Poor Idle Quality, MIL Lamp on VIN: 1FTRW08L51
P0171: lean bank one. Guy from parts store owns truck , he has replaced about anything they stock . Truck came in with po171, lean . Rough idle . I motorvaced injectors . Fuel trims were -+3. ran great . Came back 100 mile later, po171 again . Check for vac leaks , smoked it severa...
January 30, 2009