Hello all,
New to the group and Jeeps overall.
I recently acquired a 2002 TJ 2.5 auto with 79k on it. It was my sisters and has been sitting in a covered barn for the last 3 years only being started and ran a few times a year.
When I first got it to my place it started and ran but has an exhaust manifold leak and a siezed alternator.
So I jumped right into working on it and took the approach that I normally do when working on older Toyotas that I enjoy tinkering with in that if the parts are cheap enough and since im there I’m going to go ahead and replace them.
Ive since found out that this train of thought doesn’t work well with Jeeps and they may not always like non OEM parts.
So here’s what I’ve got.
When the jeep sits overnight and I go to start it, it initially idles rough and the idle surges but as soon as I give it some gas it straightens out. It also smells really rich when this is going on. It drives great other than start up and no check engine light. Here’s what I’ve initially replaced as soon as I got the jeep. Didn’t really have the jeep running long enough to know if it was doing this idle thing prior to me changing parts.
I changed the exh/int gasket
Throttle body and valve cover gasket
All fuel injectors(standard brand)
Plugs(champion 7034)
Parts store wires cap and rotor
A standard brand blue streak coil
NTK/NGK O2 sensors(both of them)
Replaced cracked and rotted vacuum lines and elbows.
Standard brand coolant temp sensor and a OEM temp thermo
Water pump and fan clutch
Changed coolant and oil.
Still have the 3yr old quarter tank of gas in it.
After I realized I’ve got an issue and realizing I should have done some research instead of just throwing parts at it, I replaced the following and completed these tests.
Standard brand TPS sensor and IAC valve.
It’s Still acting up so I completed some fuel pressure testing today.
After priming the pump 3-4 times I have 42-43psi
Running I have around 49 psi
After letting it run for a couple minutes shut it off and it bleeds down to 30psi after sitting for an hr.
If this damn thing wasn’t free(not anymore though) I would be super pissed right now.
But it is kinda fun and easy to work on compared to most cars that I’m stuck working on.
Sorry for the novel.
Myself,my bank account and the Amazon delivery driver would appreciate any help or suggestions you may have on what part I shouldn’t have replaced or what may be going on.
Thanks again
John
New to the group and Jeeps overall.
I recently acquired a 2002 TJ 2.5 auto with 79k on it. It was my sisters and has been sitting in a covered barn for the last 3 years only being started and ran a few times a year.
When I first got it to my place it started and ran but has an exhaust manifold leak and a siezed alternator.
So I jumped right into working on it and took the approach that I normally do when working on older Toyotas that I enjoy tinkering with in that if the parts are cheap enough and since im there I’m going to go ahead and replace them.
Ive since found out that this train of thought doesn’t work well with Jeeps and they may not always like non OEM parts.
So here’s what I’ve got.
When the jeep sits overnight and I go to start it, it initially idles rough and the idle surges but as soon as I give it some gas it straightens out. It also smells really rich when this is going on. It drives great other than start up and no check engine light. Here’s what I’ve initially replaced as soon as I got the jeep. Didn’t really have the jeep running long enough to know if it was doing this idle thing prior to me changing parts.
I changed the exh/int gasket
Throttle body and valve cover gasket
All fuel injectors(standard brand)
Plugs(champion 7034)
Parts store wires cap and rotor
A standard brand blue streak coil
NTK/NGK O2 sensors(both of them)
Replaced cracked and rotted vacuum lines and elbows.
Standard brand coolant temp sensor and a OEM temp thermo
Water pump and fan clutch
Changed coolant and oil.
Still have the 3yr old quarter tank of gas in it.
After I realized I’ve got an issue and realizing I should have done some research instead of just throwing parts at it, I replaced the following and completed these tests.
Standard brand TPS sensor and IAC valve.
It’s Still acting up so I completed some fuel pressure testing today.
After priming the pump 3-4 times I have 42-43psi
Running I have around 49 psi
After letting it run for a couple minutes shut it off and it bleeds down to 30psi after sitting for an hr.
If this damn thing wasn’t free(not anymore though) I would be super pissed right now.
But it is kinda fun and easy to work on compared to most cars that I’m stuck working on.
Sorry for the novel.
Myself,my bank account and the Amazon delivery driver would appreciate any help or suggestions you may have on what part I shouldn’t have replaced or what may be going on.
Thanks again
John
