NewJeeper2020
NAXJA Forum User
- Location
- Michigan
I think I originally posted this in the wrong area, so let's try this!
Hey everybody!!
This is my first post here, and the first time I've posted anywhere about my Jeep! I am usually able to find a solution to the problem I'm facing, but this one is a bit of a doozy. I am by no means mechanically inclined and have been self-taught through several forums and Youtube, so if the answer is painfully obvious please tell me! This post may be a bit long, but I want to give you all the details I can. I have a 2001 Jeep Cherokee Classic, 4.0L, 180k miles, 160A upgraded alternator, Big 3 upgrade from JeepCables.com, new 4-hole injectors from a reputable source on eBay that I found through, and all other changes have been more cosmetic, new bracket for the center console, stuff like that. ANYWAY!
So the situation:
The jeep starts up just fine. It has a little bit of a rough idle whenever I come to a stoplight but nothing concerning where it's hesitating when I step on the gas again. Driving down the road is the same story; it handles beautifully, and it doesn't feel like anything is wrong. Once it gets up to operating temp and I come to an extended stop and put it in park, say like in the garage, and I'm talking on the phone with someone, I get the same rough idle I do at stoplights, but now I'm in park. Then after maybe 5-10 mins of idling and the tach is just barely bouncing directly under the second small hashmark, and without feeling anything buck or jump, the CEL comes on, and it reads as a cylinder 5 misfire (P0305).
Things I've done to address it:
- New plugs (NGK), properly gapped at .035
- New coil pack
- Ran seafoam through the intake
- Added a heat shield between the injectors and the intake, as well as heat wrap on the fuel rail, the injector wiring, and the injectors themselves (probably overkill but *shrug*)
- Ran a full bottle of Seafoam through the gas tank with a full tank of gas
- I just had the head replaced with a clearwater head which I've read positive reviews on both here and other forums
- Head also came with new rockers, springs, and valves
- The new head came with new exhaust, head, and intake gaskets
- New high output alternator (not done to fix the problem but I want to be thorough)
- Just swapped the injectors 456, with 123 to see if the misfire would follow but it stayed on 5
Next steps:
I am a bit at a loss and I am running out of money to throw at this thing, especially with a pandemic on our hands obviously food comes before the jeep (at least for me it does!!), but with that being said I think the following steps will be to replace the CPS (from what I've heard online), look into replacing the O2 sensors, and possibly replace the cat? But if I can avoid firing the parts cannon at this thing that's the route I'd like to take.
Thank you for taking the time to read!
Hey everybody!!
This is my first post here, and the first time I've posted anywhere about my Jeep! I am usually able to find a solution to the problem I'm facing, but this one is a bit of a doozy. I am by no means mechanically inclined and have been self-taught through several forums and Youtube, so if the answer is painfully obvious please tell me! This post may be a bit long, but I want to give you all the details I can. I have a 2001 Jeep Cherokee Classic, 4.0L, 180k miles, 160A upgraded alternator, Big 3 upgrade from JeepCables.com, new 4-hole injectors from a reputable source on eBay that I found through, and all other changes have been more cosmetic, new bracket for the center console, stuff like that. ANYWAY!
So the situation:
The jeep starts up just fine. It has a little bit of a rough idle whenever I come to a stoplight but nothing concerning where it's hesitating when I step on the gas again. Driving down the road is the same story; it handles beautifully, and it doesn't feel like anything is wrong. Once it gets up to operating temp and I come to an extended stop and put it in park, say like in the garage, and I'm talking on the phone with someone, I get the same rough idle I do at stoplights, but now I'm in park. Then after maybe 5-10 mins of idling and the tach is just barely bouncing directly under the second small hashmark, and without feeling anything buck or jump, the CEL comes on, and it reads as a cylinder 5 misfire (P0305).
Things I've done to address it:
- New plugs (NGK), properly gapped at .035
- New coil pack
- Ran seafoam through the intake
- Added a heat shield between the injectors and the intake, as well as heat wrap on the fuel rail, the injector wiring, and the injectors themselves (probably overkill but *shrug*)
- Ran a full bottle of Seafoam through the gas tank with a full tank of gas
- I just had the head replaced with a clearwater head which I've read positive reviews on both here and other forums
- Head also came with new rockers, springs, and valves
- The new head came with new exhaust, head, and intake gaskets
- New high output alternator (not done to fix the problem but I want to be thorough)
- Just swapped the injectors 456, with 123 to see if the misfire would follow but it stayed on 5
Next steps:
I am a bit at a loss and I am running out of money to throw at this thing, especially with a pandemic on our hands obviously food comes before the jeep (at least for me it does!!), but with that being said I think the following steps will be to replace the CPS (from what I've heard online), look into replacing the O2 sensors, and possibly replace the cat? But if I can avoid firing the parts cannon at this thing that's the route I'd like to take.
Thank you for taking the time to read!
