Does it missfire constantly or just sometimes.

Answered by saturntech9 (expert)
23,156 answers provided

Fuel pressure can't be any different at the various cylinders. All the injectors are fed from the same large tube. I have to guess at the engine size. The 3.0L doesn't use a fuel pressure test port. You pull the supply hose off and insert a tee with a fitting.

You might consider a compression test. Chrysler typically has extremely little trouble with injectors. The spark plugs and wires normally solve 95 percent of misfires, injectors and fuel pump about one percent.

Answered by caradiodoc (expert)
17,277 answers provided

Thats where i was going is compression thats why i asked if it miss fired constantly?

Answered by saturntech9 (expert)
23,156 answers provided

It's a constant misfire. The engine is the 3.8l. So the next step should be to check compression?

Response from jvrbka
1 question asked

Yes if its constant i would check the compression.

Answered by saturntech9 (expert)
23,156 answers provided

If the compression of that cylinder is low, what do I do after that?

Response from jvrbka
1 question asked

I would check all the cylinders compression and if only the number 6 cylinder was low.I would suspect a valve issue.Then i would do a cylinder leak down test to pinpoint if that's what it is.

Answered by saturntech9 (expert)
23,156 answers provided

Ok. I'm going to try and get a compression gauge tonight.

Response from jvrbka
1 question asked

They rent them at auto zone.

Answered by saturntech9 (expert)
23,156 answers provided

Finally got a compression gauge that works. The first one I got had a small hole in the hose, so I had to take it back. The #6 cylinder only had a psi of about 100. The others were around 150. I also poured about a capful of oil in the #6 plug hole and it was still reading about 100 psi.
Where do I go from here now?

Response from jvrbka
1 question asked