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  1. Engines & Drivetrain
    Hey everyone, 2014 Jeep Patriot, 120,xxx Randomly get a CEL with p1622. It will come on and then go away for maybe a week and come back for a day. Rinse and repeat. Thinking about just replacing 02 sensors to see if that fixes it. for the first time the other day I noticed it seem like it was...
  2. TJ Wrangler Technical Forum
    As the title states, I’ve got a misfire in cylinder 6. Diagnosed from turning the key 3x to show code P0306. Specs are as follows. -2003 TJ - 4.0L - automatic trans - ~120k - recently replaced the alternator and battery - engine has a newer head gasket - common rear main leak - no other major...
  3. WK Grand Cherokee & XK Commander Forum
    Howdy all, Driving long distance last week I had two codes pop up: P2096 & P2098 My fuel economy had been degrading slowly, and the mechanic said my downstream O2 sensors needed replacing, and did so. While driving tonight I had the same codes pop up, in addition to a new code: P0287...
  4. Engines & Drivetrain
    Filled up with fuel 2 weeks ago and when I left my Jeep stalled out. Restarted and the CEL was lit and the engine was misfiring. I assumed it was water in the fuel and added HEET, but that did not help. Replaced the coil pack, spark plug wires, and spark plugs the next day, and still had the...
  5. YJ Wrangler Technical Forum
    Hey guys, I need a little diagnostic assistance. My YJ has been running flawlessly since my 2.5L rebuild about a year ago. However, this afternoon, I experienced a slight hesitation on the highway during an 18 mile long, 45 minute trip, but nothing else. I then stopped at the grocery store...
  6. Engines & Drivetrain
    Hello all, This is my first time posting to this forum, but this site has been so helpful when diagnosing/fixing issues even without posting. I have my '96 XJ 4x4, 274,000ish miles. I don't know what was done to it before I bought it 20-30,000 miles ago and I'm trying to fix it up and keep it...
  7. TJ Wrangler Technical Forum
    Hello all. Been lurking for a while, now I need help. When I bought the TJ it ran like crap. Bolted intake back on, cleaned throtle body, new MAP sensor. With cel on it will idle smooth for 5-10 min then slowes down and dies. Cleared cel with battery terminal and it wont start until cel comes...
  8. TJ Wrangler Technical Forum
    05 TJ, 77K miles 6-Speed Manual NSG370 Transmission Command-Trac Part Time 4WD System Dana 30/186MM Front Axle 3.07 Rear Axle Ratio Dana M35/194MM Rear Axle 4.0L I6 Power Tech Engine On a long trip this past weekend to Vermont (temps around 10 degrees), started hearing a rattle coming from...
  9. TJ Wrangler Technical Forum
    So i have an interesting problem with my 2000TJ Sahara (80k miles), which happens then disappears. Here's what happens: Upon a cold start the jeep drives for a couple of minutes with no issues, then develops a small misfire, one or two jumps, but is still driving well, then suddenly loses all...
  10. JK Wrangler Technical Forum
    Hey guys, I had a local shop install a Teraflex 2.5 Budget Boost this morning, as of right now still running the stock wheels/tires. Later today I noticed a weird screeching/humming sound coming from my engine but the sound comes and goes.... I go to pump gas a few hour later and after I fill...
  11. XJ Cherokee Technical Forum
    Hi all. I went to check out a 2000 Cherokee Sport 4.0 4X4. The owner had put in a new PCM and I went back the next day and took it for a test drive. All was well until I got up to about 50 mph to check if it'd go into OD, went over some railroad tracks, and then it started to lose power. I gave...
  12. WJ Grand Cherokee Forum
    Hello, and Thank you in advance for any sound advice given! So, last week I swapped out my T-stat for a 160F. I don't recommend by the way, it gave me a P1281 CEL code. Which is the coolant not reaching NOT( Normal Operating Temperature) within a given time frame. So, I put back in the stock...
  13. XJ Cherokee Technical Forum
    I recently decided to change all the fuses on my xj in the fuse box in the passenger side panel. Inadvertantly I didnt disconnect my battery before doing this. I know, major mistake. After putting the fuses back, The check engine light came on. As a result my aux radiator fan is not engaging. I...
  14. Engines & Drivetrain
    I'm getting code for torque convertor. For the past 9 months the tranny has acted really wierd, getting pregressivly worse. Main problem was shuddering. Sount like i was running over speed bumps when I went up steep hills or floored it in first. Anyways, as of last night it really has gotten...
  15. YJ Wrangler Technical Forum
    THE JEEP: I have a 1990 YJ (Formerly 4.2L, TF999) that I put a 1991 4.0L in, a 1994 engine harness, a 1995 interior harness with gauges, an AX15, and I am having some trouble. THE ISSUE: Sudden RPM changes. Backfiring Exhaust. Stall out. Also my CEL has never worked since I did the swap even...
  16. TJ Wrangler Technical Forum
    Have a 98 Wrangler, 2.5l, 4 cyl. 98K miles. We are new to Jeeps. This issue seems to be common problem in jeep world, but here goes my scenario: Engine would essentially "choke up" and slow down to a stop on me. Initial reaction was trans, but upon inspection trans is in good shape. So...
  17. WK Grand Cherokee & XK Commander Forum
    I have a 2010 Jeep Grand Cherokee with 80k miles on it. So, my check engine light came on a few days ago and I assumed it was the common gascap/emission leak error. I went to Autozone yesterday during lunch and they read the code and confirmed as much. Then last night driving home in dense...
  18. Engines & Drivetrain
    First of all my jeep is a farm vehicle and use it locally where I live to get around properties in the neighborhood. That being said I am concerned with getting good gas mileage. I hhave done a lot of research on this topic and it's hard to get a definitive answer . Thought if anyone knew best...
    cel
  19. TJ Wrangler Technical Forum
    Bought an 05 TJ three weeks ago. First Jeep. I love it....even with the death wobble....wakes you up quicker than two pots of coffee. DW is not why I'm here. I'm here because this past week my check engine light has gone nutty. I start the Jeep and it's off. A mile or so, it comes on for...
  20. TJ Wrangler Technical Forum
    Went to run to Advance earlier to pickup some tools to change the wife's plugs and the jeep wouldn't start. Lights, stereo, everything works. No click, nothing. So, I took the seven month old starter up to advance to have it tested and that was fine. Put it back on and tried again and nothing. I...
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