Bad Misfire at WOT

[sleepydsm]

Hey guys and trannys,

I've got my 92 AWD, e85, Linked, Hx40d 30psi, blah blah

At WOT the car misfires BAD

No knock CEL (link activated)

Wideband A/F is fine (well, when it isn't missing)

Boost leak test OK

Visually checked plugs, fine (didnt check gap lol)

Wires are newer.

Did not have issue last year, problem started this year and has been getting progressively worse. I have a link log and I haven't even looked at it yet.

Car drives fine and normal all other throttle areas but WOT/High Load.

Any suggestions?

If you need more info rhan above, I'll add as needed.

[goodhart]

Whenever I have had this problem it has been some part of the ignition. plugs, wires, coil.

Maybe try a different coil pack?


Also, maybe make sure your plugs are gapped properly...haha

[turbotalon1g]

is there a certain RPM point this happens or load or boost level?

Log?

If you are close to blaine swing by, I would like to take a ride help u figure it out.

[sleepydsm]

I will upload a log on Link Forums!

[jhaan_dude]

boost leak test?

[4seasons69]

boost leak test?

he already stated that the test was ok

[Alpha D]

My Problem Was A Knock Sensor Going Bad & Ignition Timing Being Of. I guess its suppose to be 5 Degrees instead of 10 degrees like just about every other car. My car would get like 27 counts of knock above 5 grand WOT now it knocks close to about 6500- 7k im running pump gas though so im not positive if this will help. just something to check.

[Kevin 1G Drummer]

Throw a set of new plugs in it and gap them correctly. I'd bet your problem is ignition related.

[blackrosenova400]

I had similar issues, tried new plugs at very low gap, went away for a day then came back, very frustrating. Tried spare spark plug wires, problem completely dissapeared. I probably moved the wires around a bit when trying new plugs, then it went away as wherever the wires were arcing at moved apart.

Also since my recent episode with a cracked wrist pin, while pulling my cylinder head off, I noticed my dam injectors clogged with that black crap! Also it left a nice puddle of black crap where it sprays in the cylinder head.
I guess before I get my car running again im gonna switch my fuel lines over to achohol compatible fuel lines as I think the black crap is eaten away rubber.

Maybe worth pulling yours if you run e85?

[sleepydsm]

Tp respond to everyone:

I have cleaned my injectors once, last year. I may have to do it again. I had black goo on mine, 120 seconds in gasoline and they are good.

The plug wires are OEM replacement NGK, probably have 10,000 on them.

To Alpha D. I have a nearly brand new OEM knock sensor. And my ignition timing is correct.

I got a box of plugs I'll toss in and see what happens.