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  1. XJ Cherokee Technical Forum
    Ok so I first bought my Jeep a month ago and the PO said it shut down on highway and it hasn’t ran since, I got it home and tried to start it asd relay a fuel pump clicked like crazy and would just crank, I finally got them to stop clicking after cleaning grounds and replacing fuses, but now I...
  2. ZJ Grand Cherokee Forum
    I have a 1994 jeep grand Cherokee limited with the 5.2l v8 and it won’t start. I’m getting fuel pressure but no spark. I’m not getting any code related to the issue and I’ve already replaced the coil and the crankshaft position sensor and the camshaft position sensor seems to test good. I also...
  3. YJ Wrangler Technical Forum
    If anyone can help would appreciate it. Did the nutter on my automatic 1990 YJ. Started fine, let it warm and then cut out. Did this about three times before I took it to the mechanic next door for the timing (8 degrees btdc). Next day when he tried to start it to adjust timing, nothing. Now it...
  4. XJ Cherokee Technical Forum
    Hey everyone, been lurking for a while but have to ask for some help because I’ve reached the end of my technical knowledge with this issue. Little background: I'm used to working on toyotas, fords, and subarus but a few months back I got a ‘97 XJ 4L 4wd with only 150k miles to play around with...
  5. XJ Cherokee Technical Forum
    So i've been stumped on this one for a few days now. i'm gonna say before hand I am absolutely TERRIBLE with anything relating to electrical. my 1990 XJ 4.0 Manuel Trans was running fine no issues. I wired in a electric fan and was messing around with the radio wiring trying to clean it up (The...
  6. Engines & Drivetrain
    I bought a 2002 4.7 out of a liberty and am trying to put it into my 2005 GC limited everything went I. Fine the old motor had a egr as the 02 does not everything else plugged I. Just fine however now it cranks but won’t start. I’ve replaced the crank and cam sensor and checked all the coils...
  7. YJ Wrangler Technical Forum
    Please Help! I recently bought the Jeep and it ran great for a month or so, I left it for 7 weeks and came back to a dead battery. I found out that the battery was toast and got a new one... No start still. I discovered that I have no spark, replaced the ignition coil then realized that the...
  8. TJ Wrangler Technical Forum
    2005 Jeep TJ X 4.0 My Jeep is my daily driver and last week when I went to leave work my Jeep would not start. We were able to narrow the problem down in the parking garage to the fuel pump. Had to loosen the fuel rail as the 05 does not have a schrader valve. We were able to get the jeep to...
  9. TJ Wrangler Technical Forum
    Hello all, I know this subject has been beat to death as I spent all yesterday reading posts trying to figure out my Crank No Start problem but I am slightly stumped. Here's the backstory: Jeep died while driving home from work the other day could'nt get it started and I had to get it towed...
  10. YJ Wrangler Technical Forum
    Ive got a 1981 Jeep CJ.. I put a MOPAR MPI Kit on the 258 straight six years back.. Its been running great untill the frame gave way.. Its been kept in a garage for the past 2 years and since the Jeep has gotten overhauled, new frame.. Since the frame swap it has not started.. Ive got new...
  11. YJ Wrangler Technical Forum
    I have a 1990 YJ 2.5 tbi was running and then the next day didn't have spark and drained battery. Took battery to get tested and everything was fine. I replaced the CPS and the ICM next thing I'm looking at is the ECU. I have power everywhere else and fuel pump turns on and provides fuel but I'm...
  12. XJ Cherokee Technical Forum
    My jeep has been running good but one day I go out to start it and it starts right up. Then after like 20 seconds of idling it just shut off. Didn't bogg out or anything. Did some research and everyone said replace the crankshaft position sensor, so I did. Still didn't start. The pcm tests good...
  13. XJ Cherokee Technical Forum
    (note: I have read forum topics and many other postings for the last 3 weeks. Begging for more help here.) No power to the coil. Had my wife go from off to on and then off to starter. Neither gave power to the plug on the going into the coil. The fuel pump did run. I just traced the wires from...
  14. XJ Cherokee Technical Forum
    A week ago it started after replacing the thermostat, but ran rough then died. I have replaced the CKS, the coolant sensor temperature sensor. No spark. Replaced a worn rotor and distributor. Checked the coil. Getting 5v to both of the above sensors. Not getting voltage to the coil. I hear the...
  15. YJ Wrangler Technical Forum
    hey guys I have a 1994 jeep wrangler yj I did have a no start problem / delayed start due to no fuel being propelled through the lines I fixed that by putting a different used PCM now it always starts now I am having a problem I took it wheelin last week and the first day it ran really well no...
  16. YJ Wrangler Technical Forum
    Hey guys, I have a 1990 yj with a 2.5 4.0 liter. The other day I was driving home from work and it just died on me like I ran out of gas luckily I was pulling into my driveway when it happened so I pushed it the rest of the way. The jeep will crank very easy but not turn over. I cannot hear...
  17. YJ Wrangler Technical Forum
    Hello, i am new to this forum.. I guess ill start from the beginning. The jeep is a 91 4.0 with an automatic trans. It ran great until i went to the mudhole last week and i parked and it would not start less than 15 mins later. Had to be jump started 5 times to make a 8 mile trip where i could...
  18. XJ Cherokee Technical Forum
    Hello everyone, I have a '93 XJ 4.0L I did a tune up on it last week getting ready to go through emissions and it was running great for a few days. yesterday I noticed that the electric cooling fan was not coming on so I started fiddling with relays testing the fan anyway it got dark so headed...
  19. XJ Cherokee Technical Forum
    randomly stalls. now it wont start at all. intermittent fuel pressure to the rail no spark from coil lead I've replaced the fuel pump, fuel filter, coil, ignition switch, and crankps I have no idea what the fuuuu is going on with this **** wagon and i'm fed up. please help me? :drool:
  20. YJ Wrangler Technical Forum
    Hi All, This is my first official post to this site however I am a big fan of this forum and have used the information within many times in other projects. I'm hoping to lean on some of your mechanical knowledge... Here's the story - I bought a 91 YJ with a 4cyl from a guy last year and was...
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