VestaviaPirate
NAXJA Forum User
- Location
- Charlotte, NC | Auburn, AL
98 XJ Sport, 197k miles.
Changed to the 5.0 injectors last summer. In the spring changed the plugs and wires. I've cleaned the cap and the button.
I started to see a pretty bad misfire. OBD says it is a 301 code (cyl. 1 misfire) I've cleaned the injectors, replaced their o-rings and checked all the plugs and wires. I did a compression test and typically see low compression in 1, with the others very close to each other. The other day I did another test and they were: 1-125, 2-150, 3-129, 4-155, 5-145, 6-155...
I don't know what is going on, there are no other noises I can speak of. You can tell the misfire is there, and the CEL comes on and off occasionally at weird times. I'll be driving around town and the CEL will come on, then a few days later I'll travel home to NC from school in AL and the CEL won't be on at all. It comes and go seemingly for no reason. I've read a bunch of posts, and everything says different things as it applies to me. I don't hear a "tick", don't hear a "hiss". I don't hear anything but the misfire. The fuel pressure seems good, I still need to check that.
This Jeep has a ton of problems it seems, but none of them seem to relate to the engine. I could be wrong. Just to explain: my gas gauge is wrong, it says I have a quarter tank left, but I run out of gas; my blower doesn't work anymore for the A/C or Heat (this just happened); the radio (not OME) will turn off randomly then flash, seems to not get enough power to turn on all the way (this is also very random and occasional).
If anyone can give me any advice, I'm sure I'm missing something and ya'll know the 4.0 a lot more than I will, so let the flaming and hopefully advice commence!
Changed to the 5.0 injectors last summer. In the spring changed the plugs and wires. I've cleaned the cap and the button.
I started to see a pretty bad misfire. OBD says it is a 301 code (cyl. 1 misfire) I've cleaned the injectors, replaced their o-rings and checked all the plugs and wires. I did a compression test and typically see low compression in 1, with the others very close to each other. The other day I did another test and they were: 1-125, 2-150, 3-129, 4-155, 5-145, 6-155...
I don't know what is going on, there are no other noises I can speak of. You can tell the misfire is there, and the CEL comes on and off occasionally at weird times. I'll be driving around town and the CEL will come on, then a few days later I'll travel home to NC from school in AL and the CEL won't be on at all. It comes and go seemingly for no reason. I've read a bunch of posts, and everything says different things as it applies to me. I don't hear a "tick", don't hear a "hiss". I don't hear anything but the misfire. The fuel pressure seems good, I still need to check that.
This Jeep has a ton of problems it seems, but none of them seem to relate to the engine. I could be wrong. Just to explain: my gas gauge is wrong, it says I have a quarter tank left, but I run out of gas; my blower doesn't work anymore for the A/C or Heat (this just happened); the radio (not OME) will turn off randomly then flash, seems to not get enough power to turn on all the way (this is also very random and occasional).
If anyone can give me any advice, I'm sure I'm missing something and ya'll know the 4.0 a lot more than I will, so let the flaming and hopefully advice commence!