Troubleshooting misfire, quick questions

[rendyx]

On my misfire, I am working on testing a couple components tomorrow. However, I'm not quite sure how to test the first 2:

1. Coil pack
2. DIS
3. Broken bolt in intake
4. Wires connected properly, plugs not doing that rare arching thing Scott Patterson described.

Also, would the first 2 even cause a miss only at idle? It's clearly not sapping high end power, as I determined today. wink And is there a way to test the wires? I doubt they'd be bad from the factory though, unless I somehow managed to damage them.

 

[Modemagic]

Pat - I remember recently that Super Steve, a.k.a. "ProjectSHO89" posted a testing procedure for the coilpack recently. I think you can pull it off and take it to Autozone and they should be able to test it. I did a search but couldn't find it quickly.

Does the CPS have anything to do with the coilpack, and firing of the cylinders?

 

[Mr Anonymous]

Since the coil pack and DIS module both generate DTC's, I would suspect they are probably both OK (unless of course they are generating codes...). I think there's a coil pack testing procedure in the shop manual, but I don't have it nearby to check at the moment.

One way I'll often try to diagnose a ground problem is by installing an additional ground path between one of the mounting screws on the DIS to the pass. strut tower where the neg. lead lug goes. Just a short piece of ~12-14 ga. wire with ring lugs on each end. If this solves the problem, then you know you have a DIS grounding problem via the intake.

 

[rendyx]

Sounds good. I'll give the strap a shot, and I will run for codes again. Actually, I'll do codes first I think, as Scott Patterson states:

"If you are able to get a spark misfire and the engine computer doesn't know about it, only the plugs or wires could cause it."

So if it were a coil or the DIS, I assume they'd give me codes?

<small>[ February 20, 2003, 08:41 AM: Message edited by: rendyx ]</small>