How many misfire threads to we need? 1 more.... Calling the guru's. SOLVED!

[TurboJake]

New CPS installed.

No dice.

[Aahj]

ah, bummer man

[jlevie]

Swap in a different harness.

[mattdk318i]

sooo, im having the same problem. And its driving me nuts

1987 325 chassis
Miller Warchip Turbo tuning kit
M52B28
60lb injectors
Blo through MAF.

everything you have described is happening to me. New fuel pump,coils,CPS,etc. Cuts out and runs lean. I was leaning toward MAF.....

Did you ever figure anything out?

[7pilot]

Did you switch coils?


m

[imwhyteyo]

any luck with this?

[Aahj]

I had a bit of a similar issue that the OP had. For me it was a combination of two things. I took a grounded screw driver and found the spark plug wires arcing. I also took off what looked to be a brand new distributor cap and rotor after hearing spark jumping inside the cap. Replaced with a new Bosch rotor button and Bremi cap and STI wires and runs fabulous. YMMV

[TurboJake]

I haven't changed the harness. My grounds look okay. No corrosion and good contact. It's started doing the sometimes it does it every time, some days it won't at all again. Today I determined it does it on WOT, or partial throttle. No difference.

Sigh. Might just boil down to it. I really don't want to do the harness though. So those who have asked, nope. no luck yet. Might as well swap harnesses. IF the other one I have is good too....



Boy she sounds good though....

[TurboJake]

2 days solid with no backfires.

I changed my valve cover gasket because the old one had a little oil leaking on the front corner over #1 plug.. Now this....

[TurboJake]

Just wanted to bump this up for the guys who asked if I'd figured it out.

11 days, not a hiccup.

Valve cover gasket... who knew. Maybe it really was leaking a fair amount of vacuum, even though the old one was still in one piece and looked just fine, leaking only what seemed to be a little bit of oil.

Moral of the story: Get a smoke test done.

[paperplane94]

Good fix, Good call!

[_r2h]

Argh, something else to add to my list of shit to do.

[walktheboard]

this is kind of old but did the valve cover gasket really fix it? or was it temporary?
I had the same symptoms and replaced about the same number of things, but just replaced my plug wires today and seemed to fix it.

[TurboJake]

Not a problem since.
*shrug*

[imwhyteyo]

I am having this same issue.. Mean backfire, power falls flat, following a big puff of smoke. m50 nv boosted Ms 2. Found oil in 2 cyl. Going to replace the leaky valve cover gasket asap and buy new plugs. Hopefully this is the issue.