[v8klla]

I currently have a dual stage boost controller on my big16g, and when I have it set to 10 psi everything is fine...Once I hit the switch to go to 15 psi I get bad misfires only under high boost...

I don't think it is fuel cut, because I ran 17 psi last summer no problem...

I also bought new plugs and wires last summer, and recently checked my plugs and they look fine...

Any ideas what could be causing this?

Thanks much,

Chris C

 

[noreaga0221]

so your wires are a year old? i would try replacing them or looking for cracks on the boots. also do you know how old your coils are?

 

[Zelite5]

What are your plugs gapped at? That may be your problem, BUT.. I just recently ran into the same problem. I thought that maybe the gap got messed up for some reason, so I checked and made sure they're perfect at .028. It still does it. I'm guessing it's the wires. I'm buying some NGK's (currently running 2 year old Megnecor's).

 

[chuckgeo]

Misfire

I also had the same problem-- new plugs fixed it. I also put in some 8mm wires.

 

[Blackboost]

Plug wires or plugs...

 

[v8klla]

Why would it only happen under higher boost levels then? If it was a plug wire or plug wouldn't it happen all the time?

CC

 

[Blackboost]

Why would it only happen under higher boost levels then? If it was a plug wire or plug wouldn't it happen all the time?

CC

Plug wire misfires tends to happen mostly at high boost levels...

 

[noreaga0221]

there is more spark needed at higher boost and high rpms so thats why misfires usually happen then. the higher energy of that spark exposes the faults of your ignition system.

 

[v8klla]

Alrighty, I will try plugs then wires...I will let you all know as soon as I find out what's up...

Thanks,

CC

 

[v8klla]

spark plugs...

They looked good, but they were definately the problem...Now that I have the boost back up I remember why I love my car! Still have a little problem called torque steer to deal with though...

Thanks guys,

Chris C

P.S. - I never mind fixing the little $10 problems...It's the big ones that'll kill ya...

 

[autoxr37]

Re: spark plugs...

They looked good, but they were definately the problem...Now that I have the boost back up I remember why I love my car! Still have a little problem called torque steer to deal with though...

Thanks guys,

Chris C

P.S. - I never mind fixing the little $10 problems...It's the big ones that'll kill ya...

sounds like it's time for a quaife