Hey I need some advice. my car between upshifts ie second to third or heel toe down shifts completely cuts out like someone reached in and turned the ignition off! Have to pop the clutch to get it going. This had started to happen during a track event and now even on the streets.
Also noted a very powdery grayish/white junk on the exhaust tips.
This was my first outing with no cats and straight pipes at the track? Only other mod is a REVO ECU flash. All hoses look ok and no CEL's
Any ideas before I limp it into the dealer?
Running too lean, need a 5 bar FPR? cant think of anything else, any advise would be appreciated!

tom
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Hmm weird, sounds definitely like something is up with your tuning!

 

Wait- do you have a after market clutch? LWFW?

 

thanks guys I'm thinking tuning but not sure. ran fine with the REVO before I took the cats off (and already had the LWFW prior)
well to the dealer tomorrow!

 

Are you running straight pipes with no cats? Maybe your Revo program wasn't written with that in mind.

 

tom, it takes awhile before your ECU will try and adjust/learn to the "new condition". it's not an immediate change if you change exhaust it's an adaptive change.

 

Khalid....copied this from the REVO web site....


Revo Stage 2 software has been specifically developed to attain the best possible performance from cars with more extensive bolt on performance modifications. The Revo Stage 2 software is tuned on vehicle applications using a 4 bar fuel pressure regulator, a quality aftermarket performance exhaust system and a good air intake induction system. Furthermore, our Stage 2 software can be used with a de-cat exhaust for race or track use. The tuning style is more aggressive than the basic Revo performance software, and will typically yield 10-15% more useable power.
Working in conjunction with an optional SPS device, Revo’s Stage 2 software can be finely tuned to each customer’s preference of drivability.
Stage 2 software produces 10-15% for power when used with:

• An aftermarket performance exhaust system
• A 4 bar fuel pressure regulator
• An optional aftermarket diverter valve

I had done the all but the FPR as the dealer said it wasnt necessary?!

Hopefully that is all it is and I will have one put in tomorrow, but for some reason I doubt it?!

Oak, I didnt know that! I just dont want to hurt the car. Its driven mostly at the track, and was taken to the track after the cats were removed. I hope I have a smart ECU!



thanks again

tom

 

tom, you do know that the turbo comes with a 4bar fpr from the factory. not sure why REVO thinks that it's an upgrade?!

 

The factory one is 3.75 bar

 

Oak, I agree and thanks Neil also, I did check and found out about the 3.8 factory regulator.

I guess a better question if you or anyone knows is does it matter what FPR to go with ie the full continuous 5 bar or the 1:1 variable.

I was going to go with the variable as it seemed to make more sense. But then Viper Bob said yeah that's great but then your dealer will have to calibrate it! So not sure? Any preferences???

thanks again

tom

 

tom, not sure about the REVO programming, but unless it's programmed for 5bar and you have changed out your fuel injectors, you are pissn in the wind.

 

thanks for all your help oak, I'll let ya know!!!