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P0300 Diagnostic Trouble Code Discussion for August 2005

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2000 GMC Sierra 1500 SL 5.3L Misfire, MIL Lamp on VIN: 1GTEK19T9Y
P0300: Multiple Cylinder Misfire Detected. Engine misfire #7 cylinder. Fuel pressure is fine. Tried swapping plug, coil & plug wire. Had converters checked at exhaust shop. Sometimes backfires under load. Cleaned injectors & problem went away for about 20 miles of driving. Read a service bullet...
August 04, 2005
2000 Audi A4 Quattro 1.8L Hesitation, Misfire, MIL Lamp on VIN: WAUDC28D9Y
P0300: Random Misfire. Dear Fellow Tech, This vehicle is a stumper. Idle is smooth, all cylinders fire good, it runs fine at times but when it acts up it does not have any power, backfires, sets MIL light and when held at 2000 rpm's, the rpm's drop no matter how much gas you give it...
August 05, 2005
1999 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G4H952K6X
P0300: Engine Misfire Detected. This vehicle came in because it was running rough. Tech 2 indicated cyl. 4 was misfiring. When I pulled the #4 spark plug it was white. I pulled two more plugs and they were both white as well. I monitored the Ho2s and the fuel trim on my test drive. The Ho2s ...
August 09, 2005
1996 Suzuki Sidekick JX Sport 1.8L Poor Idle Quality, Surge, Stall, Misfire VIN: JS3TD21V8T
P0300: Multiple Cylinder Misfire Detected. car came in with loss of power on accel, rough idle, and intermittent die out but starts up right away. scanned for codes - history code po300 and po172. tested ignition system, coil on top style. all checked ok. tested injectors resistance - checked ok. check...
August 09, 2005
1996 Chevrolet Cavalier LS 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JF52T6T
P0300: Multiple Engine Misfire Detected. Car came w/check eng. light on and off.scan sys multiple miss fire code,po300 runs fine above idle,has rough idle seems likr slight miss at times, has new delco p/plugs ign module coil housing and boots.performed motor vac. on fuel sys,no change.02 reads 250-6...
August 10, 2005
1999 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R9X
P0300: Multiple Cylinder Misfire Detected. This custumer has a intermitant miss fire problem ,it was suggested to him that it was in the distributer ,but it had a new one at 50,000 KM. Is there a problem with these distibuters .The miss can not be atributed to one cylinder and it sets code po 300 for r...
August 10, 2005
2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Misfire VIN: 1GCEK14T5Y
P0300: Multiple Cylinder Misfire Detected. This truck came to us with a dead battery and a drain. I do not know how well it ran before but the owner says in last 6 months has not ran as good as before. The truck would not idle for quite a while after we charged the battery. He also complained the ECM B...
August 10, 2005
1997 Porsche 911 Carrera 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WPOCA2994V
P0300: misfire. car has a rough idle and sets misfire codes. drives ok does not have a misfire driving. Checked ignition on scope ok checked each dist seperately both are ok. dist. belt is ok. fuel pressure and volume are within spec perfomed a cylinder balance test all cyind...
August 10, 2005
2002 Dodge Caravan SE 3.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B8GP253X2
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with Mil on, rough idle. Codes for misfire and fuel system rich. Rear bank(cylinders 1,3,5)running rich. Front bank normal. Replaced plugs,catalytic converter,pcm. Engine compression good. Sometimes cyl no. 3 will lean out, but cyls 1 and 5 alw...
August 11, 2005
1999 Isuzu Trooper S 3.5L Misfire, MIL Lamp on VIN: JACDJ58XXX
P0300: Multiple Cylinder Misfire Detected. Hello Group! This Trooper has all 3 right side cylinders dead. Injector pulse is o.k. We swapped a couple of coils from the left side with on change. Is there a common trigger or ground for the 3 coils on each side?? We don't see one in the diagram. Any help w...
August 11, 2005
1997 Chevrolet Lumina 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1WL52M3V
P0300: Multiple Engine Misfire Detected. engine misses only at idle after fuel trim goes down to @-14% to -18%. idles rough. cyl #4 misfires erratically.#5 misses very little. others don't miss.injector balance showed only 8# pressure drop on #4 cyl. we warrantied that injector now all drop @15# with...
August 12, 2005
2000 Saturn LS2 3.0L Misfire, MIL Lamp on VIN: 1G8JW52RXY
P0300: Random Misfire Detected. car runs fine and at once it will start missing. can see the mis on modus. cleared these codes and did come back. ses light will flash.
August 13, 2005
1998 Mazda Millenia 2.5L Hesitation, Misfire, boging VIN: JM1TA2214W
P0300: Multiple Misfire Detected. on wide open throttle (fast trottle tip 1/4 & up)eng bogs down & miss fire & back fires through intake //seames to loose fire 1"3" 5" cyc/ with timming light hooked up & timming drops to TDC.on slow throttle opening runs ok .base ti...
August 15, 2005
1998 Porsche Boxster 2.5L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: WPOCA2985W
P0300: misfire. ... accelerated),idles rough, & sometimes stalls when first started. Scanned with generic scanner, found mutiple misfire codes & codes related to lean limits(P1124,1126,1128,1130). Disconected maf sensor, engine starts fine, idles smooth, accelerates w...
August 15, 2005
1999 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R9X
P0300: Multiple Cylinder Misfire Detected. vehicle has 2 dead cylinders #5 and #7 always. complete compression check shows 120 or very close to it on all cyls. fuel psi and volume are good. inj. pulse is also good. we took off valve cover and checked for rocker movement and cam shaft wear. all looks ok...
August 16, 2005
1999 Chrysler Sebring LXi 2.5L Excessive Emissions, Stall VIN: 4C3AU52N6X
P0300: Multiple Cylinder Misfire Detected. hard start up, vacuum low at 8 in. when running & of course map reads low. timing jumps around from 6-126 deg., rich exhaust, intake air temp sensor reads 275F deg when when engine warms up, map reading at 4.6 volts KOEO, new map shows same, crank sensor t...
August 17, 2005
1998 Oldsmobile Bravada 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GHDT13W2W
P0300: Multiple Cylinder Misfire Detected. Owner brought car in having had it to other shops.Original complaint was for a bad overheat, missing, and MIL on(his daughter was driving the truck).Water pump was put on and a complete tune up. Still missing so it got a crank sensor and ecm and coil. Still mi...
August 17, 2005
2000 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K8Y
P0300: Engine Misfire Detected. ... a P0300, original plugs and wires, so we changed those first. Back again today with the same code. Cylinder #1 misses between 4500 and 5500 RPM, consistently. Freeze frame info. confirms this in the past as well. Swapped spark plugs and wires from cylinder...
August 19, 2005
1996 Chrysler Concorde LX 3.5L MIL Lamp on VIN: 2C3HD56F9T
P0300: Multiple Cylinder Misfire Detected. ... complaint that the check engine light was on and it was idling poorly and stalling. It had the Chrysler code 51-fuel system lean/at limit bank one and the obdII version of p0171 Bank One System too lean. It never really ran bad for us...
August 19, 2005
1996 GMC Safari 4.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GDDM19W8T
P0300: Multiple Cylinder Misfire Detected. dropped frame and engine- replaced with used unit- after changing everything possible and reinstalling engine and frame- no small task-- it now has a very rough idle- and miss, the scan data shows history miss fires on cyls # 3-4 -5-6 but # 4 is currant to the...
August 19, 2005
1996 Jeep Grand Cherokee Laredo 4.0L Misfire VIN: 1J4GZ58S3T
P0300: Multiple Cylinder Misfire Detected. Major tune-up done, decarbonized engine twice, and added techron, and clean injectors with 3 m cleaner. This vehicle runs perfect on road under any conditon with the exception of climing a steep mountain under load. It will start to missfire immediately, check...
August 22, 2005
2000 Volkswagen Passat GLS 2.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWTH23BOY
P0300: Random/Multiple Misfires Detected. Vehicle has misfire codes for cylinder 1, 4 and random. The misfire is intermittent. When under a load, either accelerating quickly or going up a hill, is when you notice a dead misfire. Having the AC on makes this problem much worse. Current ramped and it see...
August 23, 2005
1998 Volkswagen Golf GL 2.0L high idle VIN: 3VWFA81H5W
P0300: general misfire. This vehicle came in with check engine lite on. Misfire due to faulty ignition wires. Also in for racing idle when engaging into reverse or drive and upon decelleration. Replaced cap,rotor,wires and sparkplugs. Runs great now and misfire is gone. Tried again t...
August 24, 2005
1996 Saab 9000 CS 2.3L No Start VIN: YS3CD68U0T
P0300: Random/Multiple cylinder misfire detected. ... when checking this out. P0300 and P0340. I have searched the fix database and have installed NGK-BCPR7ES-11 spark plugs as per many of the replies, but did not see anything on code P0340. Is this code related to the DI mo...
August 26, 2005
1999 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5211X
P0300: Multiple Engine Misfire Detected. hey guys, this car has come into the shop with a dead #6 cylinder & random misfire code. other cylinders are also misfiring as well. we have checked spark, fuel,egr,injectores have been removed & flow tested ok. cooling system also found to have a rust...
August 30, 2005
2000 GMC Sierra 1500 SL 5.3L Misfire, MIL Lamp on VIN: 1GTEK19T9Y
P0300: Multiple Cylinder Misfire Detected. Engine misfire #7 cylinder. Fuel pressure is fine. Tried swapping plug, coil & plug wire. Had converters checked at exhaust shop. Sometimes backfires under load. Cleaned injectors & problem went away for about 20 miles of driving. Read a service bullet...
August 04, 2005
2000 Audi A4 Quattro 1.8L Hesitation, Misfire, MIL Lamp on VIN: WAUDC28D9Y
P0300: Random Misfire. Dear Fellow Tech, This vehicle is a stumper. Idle is smooth, all cylinders fire good, it runs fine at times but when it acts up it does not have any power, backfires, sets MIL light and when held at 2000 rpm's, the rpm's drop no matter how much gas you give it...
August 05, 2005
1999 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G4H952K6X
P0300: Engine Misfire Detected. This vehicle came in because it was running rough. Tech 2 indicated cyl. 4 was misfiring. When I pulled the #4 spark plug it was white. I pulled two more plugs and they were both white as well. I monitored the Ho2s and the fuel trim on my test drive. The Ho2s ...
August 09, 2005
1996 Suzuki Sidekick JX Sport 1.8L Poor Idle Quality, Surge, Stall, Misfire VIN: JS3TD21V8T
P0300: Multiple Cylinder Misfire Detected. car came in with loss of power on accel, rough idle, and intermittent die out but starts up right away. scanned for codes - history code po300 and po172. tested ignition system, coil on top style. all checked ok. tested injectors resistance - checked ok. check...
August 09, 2005
1996 Chevrolet Cavalier LS 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JF52T6T
P0300: Multiple Engine Misfire Detected. Car came w/check eng. light on and off.scan sys multiple miss fire code,po300 runs fine above idle,has rough idle seems likr slight miss at times, has new delco p/plugs ign module coil housing and boots.performed motor vac. on fuel sys,no change.02 reads 250-6...
August 10, 2005
1999 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R9X
P0300: Multiple Cylinder Misfire Detected. This custumer has a intermitant miss fire problem ,it was suggested to him that it was in the distributer ,but it had a new one at 50,000 KM. Is there a problem with these distibuters .The miss can not be atributed to one cylinder and it sets code po 300 for r...
August 10, 2005
2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Misfire VIN: 1GCEK14T5Y
P0300: Multiple Cylinder Misfire Detected. This truck came to us with a dead battery and a drain. I do not know how well it ran before but the owner says in last 6 months has not ran as good as before. The truck would not idle for quite a while after we charged the battery. He also complained the ECM B...
August 10, 2005
1997 Porsche 911 Carrera 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WPOCA2994V
P0300: misfire. car has a rough idle and sets misfire codes. drives ok does not have a misfire driving. Checked ignition on scope ok checked each dist seperately both are ok. dist. belt is ok. fuel pressure and volume are within spec perfomed a cylinder balance test all cyind...
August 10, 2005
2002 Dodge Caravan SE 3.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B8GP253X2
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with Mil on, rough idle. Codes for misfire and fuel system rich. Rear bank(cylinders 1,3,5)running rich. Front bank normal. Replaced plugs,catalytic converter,pcm. Engine compression good. Sometimes cyl no. 3 will lean out, but cyls 1 and 5 alw...
August 11, 2005
1999 Isuzu Trooper S 3.5L Misfire, MIL Lamp on VIN: JACDJ58XXX
P0300: Multiple Cylinder Misfire Detected. Hello Group! This Trooper has all 3 right side cylinders dead. Injector pulse is o.k. We swapped a couple of coils from the left side with on change. Is there a common trigger or ground for the 3 coils on each side?? We don't see one in the diagram. Any help w...
August 11, 2005
1997 Chevrolet Lumina 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1WL52M3V
P0300: Multiple Engine Misfire Detected. engine misses only at idle after fuel trim goes down to @-14% to -18%. idles rough. cyl #4 misfires erratically.#5 misses very little. others don't miss.injector balance showed only 8# pressure drop on #4 cyl. we warrantied that injector now all drop @15# with...
August 12, 2005
2000 Saturn LS2 3.0L Misfire, MIL Lamp on VIN: 1G8JW52RXY
P0300: Random Misfire Detected. car runs fine and at once it will start missing. can see the mis on modus. cleared these codes and did come back. ses light will flash.
August 13, 2005
1998 Mazda Millenia 2.5L Hesitation, Misfire, boging VIN: JM1TA2214W
P0300: Multiple Misfire Detected. on wide open throttle (fast trottle tip 1/4 & up)eng bogs down & miss fire & back fires through intake //seames to loose fire 1"3" 5" cyc/ with timming light hooked up & timming drops to TDC.on slow throttle opening runs ok .base ti...
August 15, 2005
1998 Porsche Boxster 2.5L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: WPOCA2985W
P0300: misfire. ... accelerated),idles rough, & sometimes stalls when first started. Scanned with generic scanner, found mutiple misfire codes & codes related to lean limits(P1124,1126,1128,1130). Disconected maf sensor, engine starts fine, idles smooth, accelerates w...
August 15, 2005
1999 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R9X
P0300: Multiple Cylinder Misfire Detected. vehicle has 2 dead cylinders #5 and #7 always. complete compression check shows 120 or very close to it on all cyls. fuel psi and volume are good. inj. pulse is also good. we took off valve cover and checked for rocker movement and cam shaft wear. all looks ok...
August 16, 2005
1999 Chrysler Sebring LXi 2.5L Excessive Emissions, Stall VIN: 4C3AU52N6X
P0300: Multiple Cylinder Misfire Detected. hard start up, vacuum low at 8 in. when running & of course map reads low. timing jumps around from 6-126 deg., rich exhaust, intake air temp sensor reads 275F deg when when engine warms up, map reading at 4.6 volts KOEO, new map shows same, crank sensor t...
August 17, 2005
1998 Oldsmobile Bravada 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GHDT13W2W
P0300: Multiple Cylinder Misfire Detected. Owner brought car in having had it to other shops.Original complaint was for a bad overheat, missing, and MIL on(his daughter was driving the truck).Water pump was put on and a complete tune up. Still missing so it got a crank sensor and ecm and coil. Still mi...
August 17, 2005
2000 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K8Y
P0300: Engine Misfire Detected. ... a P0300, original plugs and wires, so we changed those first. Back again today with the same code. Cylinder #1 misses between 4500 and 5500 RPM, consistently. Freeze frame info. confirms this in the past as well. Swapped spark plugs and wires from cylinder...
August 19, 2005
1996 Chrysler Concorde LX 3.5L MIL Lamp on VIN: 2C3HD56F9T
P0300: Multiple Cylinder Misfire Detected. ... complaint that the check engine light was on and it was idling poorly and stalling. It had the Chrysler code 51-fuel system lean/at limit bank one and the obdII version of p0171 Bank One System too lean. It never really ran bad for us...
August 19, 2005
1996 GMC Safari 4.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GDDM19W8T
P0300: Multiple Cylinder Misfire Detected. dropped frame and engine- replaced with used unit- after changing everything possible and reinstalling engine and frame- no small task-- it now has a very rough idle- and miss, the scan data shows history miss fires on cyls # 3-4 -5-6 but # 4 is currant to the...
August 19, 2005
1996 Jeep Grand Cherokee Laredo 4.0L Misfire VIN: 1J4GZ58S3T
P0300: Multiple Cylinder Misfire Detected. Major tune-up done, decarbonized engine twice, and added techron, and clean injectors with 3 m cleaner. This vehicle runs perfect on road under any conditon with the exception of climing a steep mountain under load. It will start to missfire immediately, check...
August 22, 2005
2000 Volkswagen Passat GLS 2.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWTH23BOY
P0300: Random/Multiple Misfires Detected. Vehicle has misfire codes for cylinder 1, 4 and random. The misfire is intermittent. When under a load, either accelerating quickly or going up a hill, is when you notice a dead misfire. Having the AC on makes this problem much worse. Current ramped and it see...
August 23, 2005
1998 Volkswagen Golf GL 2.0L high idle VIN: 3VWFA81H5W
P0300: general misfire. This vehicle came in with check engine lite on. Misfire due to faulty ignition wires. Also in for racing idle when engaging into reverse or drive and upon decelleration. Replaced cap,rotor,wires and sparkplugs. Runs great now and misfire is gone. Tried again t...
August 24, 2005
1996 Saab 9000 CS 2.3L No Start VIN: YS3CD68U0T
P0300: Random/Multiple cylinder misfire detected. ... when checking this out. P0300 and P0340. I have searched the fix database and have installed NGK-BCPR7ES-11 spark plugs as per many of the replies, but did not see anything on code P0340. Is this code related to the DI mo...
August 26, 2005
1999 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5211X
P0300: Multiple Engine Misfire Detected. hey guys, this car has come into the shop with a dead #6 cylinder & random misfire code. other cylinders are also misfiring as well. we have checked spark, fuel,egr,injectores have been removed & flow tested ok. cooling system also found to have a rust...
August 30, 2005