semperfi1371
NAXJA Forum User
Let me begin with an apology for a long post and a small bit ofn history...Ok this is my first XJ and 4.0, It was my old mans since new, and having been a lifelong YJ, all 2.5 swapped for small blocks, owner (I just gave my owned since new '92 to my 18 year old & '93 to my 16 yr old, I'll have to get an '05 for my 5 yr old one day! lol) Anyway, I am bewildered by the differences between the 2 models...
I am having several issues all at once it seems, some I've seen many posts on and youll see my meaning. I got this car upon my return from the "sandbox" and it sat about a year to 2 years....
1- High idle. I have had different issues with this since driving it. It starts after several cranks, pump is good low pressure after sitting, so figure drain back and have ordered a check valve to splice in (strong gas smell often too not sure what thats about as no leaks can be seen and new gas cap)After start she goes up to 3k, settles down between 5-800 ish when cold. If I put in gear (R) and give it gas right away she dies, but if I just let it roll til I need to put in D, Im ok. after warming up, in park or nuetral, it sits at about 1500 and I get an occasional misfire or "bump" up or down in idle, kinda mellow rough idle. I have repalced the throttle body off another renix that I pimped from a job I worked at after thourough clean-up and testing of IAC and TPS of newer TB. I used a gasket compound as I was unable to get at TB gasket inside of a week where I was. prior to replacing it was always idling at 3k and only resolution was get out, pull a vac hose, restart then would idle @ 800 and reattach the hose and it would stay there. now its better but still "thumps" into gear. No discernible vac leaks, loose intake bolts or cracks in manifold or anything. New "E3 plugs, cap & rotor. & a relatively recent ECU installed. Any ideas out there?
2- Bad leaf springs. WTF? I know that springs go bad, but negative arch? I know they were replaced at maybe 150k and I'm at 210k. I picked up a pair off a '91 (flat) at JY for $20 and a short AAL for $25 from Amazon plus new shocks, u-bolts, and spring bushings. Should I just build this pack & swap or leave long spring in and build that up with the JY pack and AAL? I cant afford new springs and its my DD not lookin for a lift if I get @ inches I don't care but not my goal, I have a lifted toy already...oh and it bottoms out if I have any passengers other than my kid in car and the ride is ROUGH and Im used to rough rides but this is horrific!
3- I get a "moaning/groaning" sound in front end, sounds like bogging almost, if I hit a bump over 5mph while going straight or turning that goes away if I let off gas for a second as soon as I hear it. Also a "thumping" sound under DS floor if I hit a bump turning too. Ive replaced the front axle u-joints, rotors, everything is greased up and fluids are full. I see no apparent issues while under car and turning wheels, etc....
That's more than enough for today, its Friday! Anyway, I leave for the Gulf again in a couple months and I'd like to be able to feel safe leaving this with my ex wife so she can get my boy to & from school while I'm away. I don't have a lot of cash to throw at her as I'm not really working other than plumbing side jobs and SSGT pay grade = broke! I'm looking to get some ideas, and a game plan together to make her safe for 56 daily miles of Chicago driving for the winter.
1990 4.0, 4spd auto, 242 TC. Any questions feel free to ask me on yahoo mail: chicagomarine0291 is my addy!
Thanks in advance for any help!!!
I am having several issues all at once it seems, some I've seen many posts on and youll see my meaning. I got this car upon my return from the "sandbox" and it sat about a year to 2 years....
1- High idle. I have had different issues with this since driving it. It starts after several cranks, pump is good low pressure after sitting, so figure drain back and have ordered a check valve to splice in (strong gas smell often too not sure what thats about as no leaks can be seen and new gas cap)After start she goes up to 3k, settles down between 5-800 ish when cold. If I put in gear (R) and give it gas right away she dies, but if I just let it roll til I need to put in D, Im ok. after warming up, in park or nuetral, it sits at about 1500 and I get an occasional misfire or "bump" up or down in idle, kinda mellow rough idle. I have repalced the throttle body off another renix that I pimped from a job I worked at after thourough clean-up and testing of IAC and TPS of newer TB. I used a gasket compound as I was unable to get at TB gasket inside of a week where I was. prior to replacing it was always idling at 3k and only resolution was get out, pull a vac hose, restart then would idle @ 800 and reattach the hose and it would stay there. now its better but still "thumps" into gear. No discernible vac leaks, loose intake bolts or cracks in manifold or anything. New "E3 plugs, cap & rotor. & a relatively recent ECU installed. Any ideas out there?
2- Bad leaf springs. WTF? I know that springs go bad, but negative arch? I know they were replaced at maybe 150k and I'm at 210k. I picked up a pair off a '91 (flat) at JY for $20 and a short AAL for $25 from Amazon plus new shocks, u-bolts, and spring bushings. Should I just build this pack & swap or leave long spring in and build that up with the JY pack and AAL? I cant afford new springs and its my DD not lookin for a lift if I get @ inches I don't care but not my goal, I have a lifted toy already...oh and it bottoms out if I have any passengers other than my kid in car and the ride is ROUGH and Im used to rough rides but this is horrific!
3- I get a "moaning/groaning" sound in front end, sounds like bogging almost, if I hit a bump over 5mph while going straight or turning that goes away if I let off gas for a second as soon as I hear it. Also a "thumping" sound under DS floor if I hit a bump turning too. Ive replaced the front axle u-joints, rotors, everything is greased up and fluids are full. I see no apparent issues while under car and turning wheels, etc....
That's more than enough for today, its Friday! Anyway, I leave for the Gulf again in a couple months and I'd like to be able to feel safe leaving this with my ex wife so she can get my boy to & from school while I'm away. I don't have a lot of cash to throw at her as I'm not really working other than plumbing side jobs and SSGT pay grade = broke! I'm looking to get some ideas, and a game plan together to make her safe for 56 daily miles of Chicago driving for the winter.
1990 4.0, 4spd auto, 242 TC. Any questions feel free to ask me on yahoo mail: chicagomarine0291 is my addy!
Thanks in advance for any help!!!