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54 Posts
Searching through forum after forum, thread after thread but not sure what to do.
First, I have a 2008 Commander Sport 3.7L with 103k miles.
Ive been wracking my brain trying to figure out this issue. A few months ago, my TPS, Airbag & Check Engine light were all on. I was able to get the airbag light to go out by checking/cleaning all connections under the seats and replaced the fuses which seemed a bit corroded. All air pressure is fine so I assume the TPS light is due to a faulty TPS valve.
I am getting a P0300 code (random misfire) but no cylinder code. I'll drive the Jeep and it will be fine. I'll go to drive it again shortly afterwards it will through the check engine light and run really rough. Lately it now seems to be sluggish and then all of a sudden the power will kick in. Someone posted on another forum that he noticed it seemed to shift between gears alot especially going up hills. Never thought much about it but mine does as well. I usually manually downshift it a gear to keep some power but driving through the hills of Vermont last year I really noticed it had no power. Sometimes I will also smell gasoline but it goes away.
Things I have done:
- Put new NGK Iridium spark plugs
- Replaced all coil packs
- Tested the battery
- Replaced a broken ground strap ( the one that attaches to the exhaust, frame and transmission,)
- Cleaned electrical connections
- Replaced transmission coolant lines and had a dealer check the fluid level
- Recently changed out the Iridium plugs for the original copper plugs. In doing so, I noticed I didnt tighten the plugs down as much as I should have. I blew compressed air into the holes to remove any dirt as recommended by the service manual. When I did that to cylinder 3, some oil came splashing back up at me.
- Known fixes, but not sure where to start:
- Air Intake sensor
- Mass Air meter sensor
- Throttle position sensor
- Crankshaft position sensor
- Camshaft position sensor
- Oxygen sensors
- Fuel pressure
- Vacuum leak
- Fuel injectors
- New PCM
- And so on.....
I didnt know if someone should suggest where to start since its semi intermittent and seems to be more when Ive driven it and it starts when i go to drive it again shortly afterwards.
Confused and fed up with this issue.
First, I have a 2008 Commander Sport 3.7L with 103k miles.
Ive been wracking my brain trying to figure out this issue. A few months ago, my TPS, Airbag & Check Engine light were all on. I was able to get the airbag light to go out by checking/cleaning all connections under the seats and replaced the fuses which seemed a bit corroded. All air pressure is fine so I assume the TPS light is due to a faulty TPS valve.
I am getting a P0300 code (random misfire) but no cylinder code. I'll drive the Jeep and it will be fine. I'll go to drive it again shortly afterwards it will through the check engine light and run really rough. Lately it now seems to be sluggish and then all of a sudden the power will kick in. Someone posted on another forum that he noticed it seemed to shift between gears alot especially going up hills. Never thought much about it but mine does as well. I usually manually downshift it a gear to keep some power but driving through the hills of Vermont last year I really noticed it had no power. Sometimes I will also smell gasoline but it goes away.
Things I have done:
- Put new NGK Iridium spark plugs
- Replaced all coil packs
- Tested the battery
- Replaced a broken ground strap ( the one that attaches to the exhaust, frame and transmission,)
- Cleaned electrical connections
- Replaced transmission coolant lines and had a dealer check the fluid level
- Recently changed out the Iridium plugs for the original copper plugs. In doing so, I noticed I didnt tighten the plugs down as much as I should have. I blew compressed air into the holes to remove any dirt as recommended by the service manual. When I did that to cylinder 3, some oil came splashing back up at me.
- Known fixes, but not sure where to start:
- Air Intake sensor
- Mass Air meter sensor
- Throttle position sensor
- Crankshaft position sensor
- Camshaft position sensor
- Oxygen sensors
- Fuel pressure
- Vacuum leak
- Fuel injectors
- New PCM
- And so on.....
I didnt know if someone should suggest where to start since its semi intermittent and seems to be more when Ive driven it and it starts when i go to drive it again shortly afterwards.
Confused and fed up with this issue.