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P0301 Diagnostic Trouble Code Discussion for August 2010

Cylinder 1 Misfire Detected


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Trouble Ticket Help Requests for DTC P0301
Help Request Posted
2004 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S54
P0301: Cylinder 1 Misfire Detected. You would think this would be easy. Cylinder 1 misfire intermitent, mostly when cold at idle and slight accel. Switched #1 and #2 and then #3 injectors around and it always misfires on cylinder 1. Tried a new coil pack. Checked while idling bad and it is cylin...
August 02, 2010
2004 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S54
P0301: Cylinder 1 Misfire Detected. You would think this would be easy. Cylinder 1 misfire intermitent, mostly when cold at idle and slight accel. Switched #1 and #2 and then #3 injectors around and it always misfires on cylinder 1. Tried a new coil pack. Checked while idling bad and it is cylin...
August 03, 2010
2000 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R7Y
P0301: Cylinder 1 Misfire Detected. this car has the codes listed and you can not feel a misfire i do know that the maf and the coil pack were replaced along with the sparkplugs(found repair invoice in seat) scanner shows history misfires but no current we cleared light and drove several times o...
August 04, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0301: misfire cyl 1. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 07, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0301: misfire cyl 1. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 10, 2010
2003 Chrysler Town & Country (Van) LXi 3.8L Misfire VIN: 2C8GT54L43
P0301: missfire on cylinder 1. Help! got a real hair puller on this chrysler. Has a missfire on #1 cylinder all the time at idle. Has had new plugs and wires. I have tried swapping plugs and wires on a different cylinder, I have checked the spark output at the end of the wire, replaced the ...
August 11, 2010
2000 Toyota Tacoma SR5 3.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 4TAWN72N8Y
P0301: Cylinder 1 Misfire Detected. Here is an interesting one: This vehicle has very low actual mileage. Tested and replaced Cam positon sensor. Cam sensor tested good but replaced it anyway. Problem remains. Tested and replaced crank shaft position sensor as well as a poor signal from this has...
August 11, 2010
1999 Dodge Intrepid 2.7L Poor Idle Quality, Misfire VIN: 2B3HD46R3X
P0301: Cylinder 1 Misfire Detected. ... car came no start at times hard start rough idle tested fuel pressure was in normal range but dropped quickly with engine off found 3 injectors lweaking also found lower intake manifold vac leak replace gasket codes p0300 p0301 p0303 no miss fire showing o...
August 17, 2010
2002 Ford Explorer XLT 4.6L Surge, Misfire, MIL Lamp on VIN: 1FMDU73W82
P0301: 1 misfire. this will not accelerate except at wot. at medium throttle openings it falls on it's face. the 1/1 O2 sensor reads 1587mv engine running and over 1000mv koeo. tried a new bosch O2 sensor, and no difference. swapped sensors side to side, (other one was an oem s...
August 17, 2010
2002 Ford E-250 Econoline 5.4L Misfire
P0301: Misfire cyl 1. ... returned weekly with the same codes. A first we thought we had it, changed the Coil and boot on cyl 1 and all the plugs, the van ran fine on the test drive. 2 days later the light came back on. Checked the coil for output (good) switched the coil, plug, bo...
August 18, 2010
2002 Land Rover Freelander SE 2.5L Misfire, MIL Lamp on VIN: SALNM22272
P0301: Cylinder 1 misfire. ... MIL with a P0171. Diagnosis of this code found a vacuum leak between the intake plenum and the lower intake. Recommended to customer resealing and while the plenum was off to replace it as these are notorious for the plenum going bad and needing to be repl...
August 19, 2010
1998 Lexus ES300 3.0L Misfire, MIL Lamp on VIN: JT8BF28G4W
P0301: Cylinder 1 Misfire Detected. Vehicle running poorly, missfiring on the rear 3 cylinders. Have scope tested ignition and verified spark via KV tester and all is good on all 6 cylinders. Tested compression of rear cylinders all around 120 psi. Tested for vacuum leaks and unable to find any....
August 19, 2010
2002 Ford E-250 Econoline 5.4L Misfire
P0301: Misfire cyl 1. ... returned weekly with the same codes. A first we thought we had it, changed the Coil and boot on cyl 1 and all the plugs, the van ran fine on the test drive. 2 days later the light came back on. Checked the coil for output (good) switched the coil, plug, bo...
August 22, 2010
2000 Volkswagen Jetta GL 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: VWVW4FYLMO
P0301: cylinder 3 miss fire. This car will not take the gas at all. When it is cold it will only sit and ideal , if you hit the gas it falls flat on its face. Plugs were real bad looking. They looked like they have been buring oil. The coil pack was replaced along with plugs , wires. the ...
August 23, 2010
2004 Kia Rio 1.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: KNADC12544
P0301: Cylinder 1 Misfire Detected. We got this rio from another shop that has replaced complete secondary and still having problems. we originally had some trouble getting it to act up. Vehicle will sit over night we let it run for 30 min and will get codes and engine runs terrible. the previou...
August 27, 2010
2004 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S54
P0301: Cylinder 1 Misfire Detected. You would think this would be easy. Cylinder 1 misfire intermitent, mostly when cold at idle and slight accel. Switched #1 and #2 and then #3 injectors around and it always misfires on cylinder 1. Tried a new coil pack. Checked while idling bad and it is cylin...
August 02, 2010
2004 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S54
P0301: Cylinder 1 Misfire Detected. You would think this would be easy. Cylinder 1 misfire intermitent, mostly when cold at idle and slight accel. Switched #1 and #2 and then #3 injectors around and it always misfires on cylinder 1. Tried a new coil pack. Checked while idling bad and it is cylin...
August 03, 2010
2000 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R7Y
P0301: Cylinder 1 Misfire Detected. this car has the codes listed and you can not feel a misfire i do know that the maf and the coil pack were replaced along with the sparkplugs(found repair invoice in seat) scanner shows history misfires but no current we cleared light and drove several times o...
August 04, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0301: misfire cyl 1. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 07, 2010
2006 Ford F-150 XLT 5.4L Hesitation, Surge, Stall, MIL Lamp on, low power VIN: 1FTPW12546
P0301: misfire cyl 1. Need some assistance on this Ford, First off I would like to say thank you in advance for any help in this problem child. This truck came in with low power on accelation and bucking while driving. There is a what seem to be a valve train tick on the passenger ...
August 10, 2010
2003 Chrysler Town & Country (Van) LXi 3.8L Misfire VIN: 2C8GT54L43
P0301: missfire on cylinder 1. Help! got a real hair puller on this chrysler. Has a missfire on #1 cylinder all the time at idle. Has had new plugs and wires. I have tried swapping plugs and wires on a different cylinder, I have checked the spark output at the end of the wire, replaced the ...
August 11, 2010
2000 Toyota Tacoma SR5 3.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 4TAWN72N8Y
P0301: Cylinder 1 Misfire Detected. Here is an interesting one: This vehicle has very low actual mileage. Tested and replaced Cam positon sensor. Cam sensor tested good but replaced it anyway. Problem remains. Tested and replaced crank shaft position sensor as well as a poor signal from this has...
August 11, 2010
1999 Dodge Intrepid 2.7L Poor Idle Quality, Misfire VIN: 2B3HD46R3X
P0301: Cylinder 1 Misfire Detected. ... car came no start at times hard start rough idle tested fuel pressure was in normal range but dropped quickly with engine off found 3 injectors lweaking also found lower intake manifold vac leak replace gasket codes p0300 p0301 p0303 no miss fire showing o...
August 17, 2010
2002 Ford Explorer XLT 4.6L Surge, Misfire, MIL Lamp on VIN: 1FMDU73W82
P0301: 1 misfire. this will not accelerate except at wot. at medium throttle openings it falls on it's face. the 1/1 O2 sensor reads 1587mv engine running and over 1000mv koeo. tried a new bosch O2 sensor, and no difference. swapped sensors side to side, (other one was an oem s...
August 17, 2010
2002 Ford E-250 Econoline 5.4L Misfire
P0301: Misfire cyl 1. ... returned weekly with the same codes. A first we thought we had it, changed the Coil and boot on cyl 1 and all the plugs, the van ran fine on the test drive. 2 days later the light came back on. Checked the coil for output (good) switched the coil, plug, bo...
August 18, 2010
2002 Land Rover Freelander SE 2.5L Misfire, MIL Lamp on VIN: SALNM22272
P0301: Cylinder 1 misfire. ... MIL with a P0171. Diagnosis of this code found a vacuum leak between the intake plenum and the lower intake. Recommended to customer resealing and while the plenum was off to replace it as these are notorious for the plenum going bad and needing to be repl...
August 19, 2010
1998 Lexus ES300 3.0L Misfire, MIL Lamp on VIN: JT8BF28G4W
P0301: Cylinder 1 Misfire Detected. Vehicle running poorly, missfiring on the rear 3 cylinders. Have scope tested ignition and verified spark via KV tester and all is good on all 6 cylinders. Tested compression of rear cylinders all around 120 psi. Tested for vacuum leaks and unable to find any....
August 19, 2010
2002 Ford E-250 Econoline 5.4L Misfire
P0301: Misfire cyl 1. ... returned weekly with the same codes. A first we thought we had it, changed the Coil and boot on cyl 1 and all the plugs, the van ran fine on the test drive. 2 days later the light came back on. Checked the coil for output (good) switched the coil, plug, bo...
August 22, 2010
2000 Volkswagen Jetta GL 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: VWVW4FYLMO
P0301: cylinder 3 miss fire. This car will not take the gas at all. When it is cold it will only sit and ideal , if you hit the gas it falls flat on its face. Plugs were real bad looking. They looked like they have been buring oil. The coil pack was replaced along with plugs , wires. the ...
August 23, 2010
2004 Kia Rio 1.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: KNADC12544
P0301: Cylinder 1 Misfire Detected. We got this rio from another shop that has replaced complete secondary and still having problems. we originally had some trouble getting it to act up. Vehicle will sit over night we let it run for 30 min and will get codes and engine runs terrible. the previou...
August 27, 2010