StylerG
NAXJA Forum User
- Location
- Oklahoma City
First off
2000 with coil rail distributor-less ignition system. 4.56 gears and 265 tires (32") 232k miles roughly 90k on engine block.
Jeep runs like an unmotivated turtle. Below 2k rpms has decent power anything above that it is gutless. Partial throttle gives same response as full throttle.
In the past 1k miles has had new TPS, CPS and IAC. MAP tests fine. Fuel pressure bounces from 45-49psi while idleing and is dead on at 49 when pushing the throttle in park. Fuel pressure does not drop off after shutdown-not a bit. Has APN Header and exhaust was redone from header back with a new muffler last year. o2 sensors in good shape. No codes, idles fine and climbs rpms fine. Runs great just doesnt have any power. Compression is 140 with one cylinder being 135 and one being 145. Air filter is fine.
I've read through tons of pages of threads-most end up with a clogged cat. I've removed that and fitted a straight pipe to try and narrow down the solution. My fuel pressure seems to be perfect. This jeep has run a lot better in previous years-ive owned it since new just havent driven it regularly for the past few years. Sold wifes car and she had to drive it for a few weeks this fall and haven't been able to track down the cause.
I've questioned the fuel synchronization needed for the 2000+ ignition systems, but the plugs are colored correctly like its running right. I think i might be down to the torque converter (and i have checked the brake switch). When sitting parked for awhile the jeep has to rev a bit to get it to move. When going down the road and you let off the gas the jeep de-accelerates quickly. It feels as though its braking but the brakes aren't grabbing i checked them. Jeep shifts fine when moving. TCase was rebuilt a few years ago and chain wasnt in bad shape.
Fuel Pump is original, so is the coil rail so ive also questioned both of those-but they both have indications that they are still operating properly. I'm out of ideas on how to narrow this down. Any help?
2000 with coil rail distributor-less ignition system. 4.56 gears and 265 tires (32") 232k miles roughly 90k on engine block.
Jeep runs like an unmotivated turtle. Below 2k rpms has decent power anything above that it is gutless. Partial throttle gives same response as full throttle.
In the past 1k miles has had new TPS, CPS and IAC. MAP tests fine. Fuel pressure bounces from 45-49psi while idleing and is dead on at 49 when pushing the throttle in park. Fuel pressure does not drop off after shutdown-not a bit. Has APN Header and exhaust was redone from header back with a new muffler last year. o2 sensors in good shape. No codes, idles fine and climbs rpms fine. Runs great just doesnt have any power. Compression is 140 with one cylinder being 135 and one being 145. Air filter is fine.
I've read through tons of pages of threads-most end up with a clogged cat. I've removed that and fitted a straight pipe to try and narrow down the solution. My fuel pressure seems to be perfect. This jeep has run a lot better in previous years-ive owned it since new just havent driven it regularly for the past few years. Sold wifes car and she had to drive it for a few weeks this fall and haven't been able to track down the cause.
I've questioned the fuel synchronization needed for the 2000+ ignition systems, but the plugs are colored correctly like its running right. I think i might be down to the torque converter (and i have checked the brake switch). When sitting parked for awhile the jeep has to rev a bit to get it to move. When going down the road and you let off the gas the jeep de-accelerates quickly. It feels as though its braking but the brakes aren't grabbing i checked them. Jeep shifts fine when moving. TCase was rebuilt a few years ago and chain wasnt in bad shape.
Fuel Pump is original, so is the coil rail so ive also questioned both of those-but they both have indications that they are still operating properly. I'm out of ideas on how to narrow this down. Any help?