|11-17-2005 05:36 AM|
|10-26-2005 03:23 PM|
Unfortunately I found some metal in my oil and decided to replace the engine. In doing so I found the time chain wear would allow the engine to rotate some 20 to 30 degrees before the rotor would move. Explains all the symptoms. I had a hunch that this could have been the problem, but everyone said the timing chains do not cause problems with the mileage.
I hope this may help someone else hunting for a similar relief.
Thanks for all of your input.
|10-13-2005 12:09 PM|
|tucson97||I am having similar issues (see new post). Is this setting any codes for you? Mine was not turing on the check engine light, but setting codes 11 and 47.|
|10-09-2005 08:27 PM|
|jeepmutt||OK, not to be elementary, but did you also change the dist cap/rotor, air filter & plug wires? Poor spark or not enough air coming will cause what you describe. May want to consider a new O2 sensor while you're at it.|
|10-07-2005 01:53 PM|
Still Poor Performance
Went to Jeep yesterday and they flashed my computer with an upgrade (Technical Service Bulletin for drivability issues). Did not help. Am I the only one having this problem???
I have read about the chip/programmers and they discribe their product to overcome poor performance/hesitation/bucking. If they are making these products then somebody must be having the same problems.
If so, has ANYONE overcome the surging/bucking/hesitation under heavy acceleration from lower rpm's 3rd gear? Is this just the way jeep computer settings leave you? I assume that when the jeep warmsup it starts leaning the system down causing lag responses.
|10-04-2005 10:44 PM|
there's also a step by step guide to flashing the ECM in the FAQ.
and no it doesn't involve dropping your pants!
|10-04-2005 07:30 PM|
|1BLKJP||Try disconnecting your battery over night. That should flash the ECM and cause it to relearn everything all over again.|
|10-04-2005 12:47 PM|
97 TJ Performance
I have a 97 TJ with 4.0, 4:10 gears, 33" tires, K&N air filter(stock),5sp., Borla Exhaust with Header. I am experiencing surging/hesitation when giving full throttle lower rpm's (especially 3rd gear on an incline...1300 - 2300rpm's). After you get the rpm's up to upper mid range finally clears up. I have replaced fuel pump, injectors, MAP sensor, Throttle Position Sensor, went from 3:55 to 4:10 gears (suggested from Rock-It), comlete tune up with champion plugs. Better performance overall BUT did not correct surging/hesitation. Tailpipe burns black and feels seems rich. One of the Jeep dealers suggested that the ECM may need to be re-programmed but was not sure if the technical bulletins covered the exact problem that I have(re-program would address my symptums . I have read about the computer chips (JET, Hypertech,etc.....sounds like some of the same things that I am experiencing. Has anyone had this problem? Any feedback on the chips?