Justin Burgess

Been having this problem for a couple weeks now. While idling and accelerating there is a noticeable miss. Seems worse at low rpm. The engine makes a sputtering sound while accelerating if that makes any sense. I've replaced ignition module, checked the plugs, and fuel pressure are all ok. The dizzy does not have play and I blocked off the egr valve to see if that would change anything, it didn't. Any ideas what else to try? I havent done a vaccuum test or a compression test yet. I did do a ohm test on the injectors they read 13.9 to 14.1.

Bubba 95SN

Run the EEC 1V tests. Be sure to do all three cylinder balance tests. May have a starting place then.

Justin Burgess

Thanks, didnt know about that. One question, when i was testing the car, didnt think to much about it then, my fuel pressure with the engine off and the key on was reading 20psi, but when running its around 38psi. I will have to retest to confirm, but it should be between 35 and 45psi with engine off right?

Bubba 95SN

While running unplug vacum to FPR, pressure should increase. SBFTech has the test proceedures for EEC 1V. Should point to offending cylinder(miss) with balance test.

Justin Burgess

ok, with engine off key on test, got im getting code 85, and got code 34 but i think the code 34 was from me blocking the egr valve the other day. While engine running test got code 8, code 9 then code 8. Any ideas? Im assuming cylinder 8 is the problem?

Justin Burgess

Well ran the test again, the running test, and got 11, and 9. So either i did it wrong the first time, or 8 is missing sometimes. I dont know.

Bubba 95SN

Yup, that would be the #8.

Justin Burgess

My baby is back. Went to pull the #8 plug and the top half of the plug came out. New plug and now shes back. Thanks fore the help. The running test really made things alot easier.