Slow And Smokey Nm35

[brizzi]

Hi people, this car is really starting to do my head in! Car has never thrown a cel or missed a beat. Here goes car has new hi flow turbo, new plugs, pressure tested intercooler set up new intercooler claps etc etc . new big trans cooler , full trans flush. Does not use oil. Big dump pipe, hiflow cat 100cel. Car use to pull like a train, but not any more its sad. All it does now is bellow grey black smoke and lucky to out run a hyundai xcel.. Im lost for ideas??

[Ben C34]

Boost leak is the obvious one, but you have checked for that.

Try another afm

Edited July 31, 2014 by Ben C34

[brizzi]

Should'nt that throw a cel but? Plus it surges on and off on boost.. Like the gate on turbo opening and closing constantly even holding your foot on throttle at the same point. Should your waste gate actuator have a tension spring on it? Mine does:-/

[scotty nm35]

It has one of my high boost actuators on it by the sounds of it, what other mods have been done? Sounds like it's in limp mode. Is the engine lamp lit?

[brizzi]

no engine lamp ....

[brizzi]

Turbo, dump, cooler, stainless intake, 3" exhaust.

[PN-Mad]

So you have pressure tested the intake system since the fault has occurred?

[brizzi]

Sure have held 30 psi

[Ben C34]

Cleaning the afm is quick and easy. I would do it.

[brizzi]

Cleaned it like 3 times now i think with the 24 dollar a can maf cleaner :-/

[Ben C34]

Comp test.

[Sinista32]

" bellow grey black smoke and lucky to out run a hyundai xcel"

I'd of thunk Turbo

Edit: make any unusual noise engine or turbo ?

Edited July 31, 2014 by Sinista32

[brizzi]

sounds great, no unusual noises :-) only un usual thing is constant wastegate flutter on boost goin up hills under load some times without lifting foot off the throttle..

[scotty nm35]

Wastegate flutter? You have a screamer pipe? How would you hear it otherwise?

I would drop a new AFM into it.

[Equilibrise]

Probably is the bov making noise, not the waste gate. Is it misfiring while it does this? If the entire intake from afm to engine holds 30psi then it is most likely afm or a misfire issue ie fouled plugs, coil packs, poor compression. Eg. Mine has had Intake leaks, fouled plugs and faulty coil packs and hasn't thrown a code. I believe others have had their afm die without throwing a code also.

[brizzi]

Flutters to much! and you can feel it.. no screamer pipe.

[PN-Mad]

Do you have a stock plumbed BOV or aftermarket to atmosphere?

[Brick]

Sounds like a after market bov with out the restricter taken out of the standard pipe

[brizzi]

All sorted :-) Had turbosmart boost controler on pipe from intercooler pipe to tb, totally blocked so no pressure getting to wastegate. And hose from cam cover to turbo inlet cut off and pointing to the ground:-0 Im guessing till you get to pressure off vacuum car can suck un metered air until pcv shuts.. if im correct??

[brizzi]

Drives so much better but should factory boost gauge be way off the scale:-/ But my constant under load stuttering has gone:-) Could someone please post up a pic of factory boost controller piping:-)