Turbo Issues

[Nliiitend1]

I have a hard time believing that this is a wanted "failsafe" effect from the ECU. This is not knock retard...

 

[WTF MATE]

It's not a failsafe effect, it's a combination of the turbo being in an inefficient area of the matrix and poor tuning. The car is dumping fuel that isn't being used.

 

[Nliiitend1]

Well if there was simply excess fuel, would the car fall flat on it's face?

 

[WTF MATE]

Yes running excessively rich for a split second will cause hesitation, loss of power, stuttering, etc.

 

[AutoEuphoria]

Boost cut/fuel cut. Sometimes, even on a completely stock car, the boost will build higher than the ECU wants its to and will stay there (over 18psi) for longer than the ECU thinks is safe, so it immediately cuts power and the car jerks.

Do you have a gauge or DH?

 

[Nliiitend1]

No I don't have any sort of logging device or a boost guage. It just seems odd that I'd have crazy boost that would necessitate the car cutting power when short-shifting into second or briefly hitting the gas at a relatively low RPM.

Also, this wasn't a "jerking" type power cut. It was more of a "bog" where it just didn't accelerate (until I lifted the throttle and then re-applied).

 

[AutoEuphoria]

Ah, ok. I misunderstood. Well, I believe the ECU limits boost in 2nd, doesn't it? So that might cause that bogging. You might also be seeing some knock retard for some reason, I know that feels like you're dragging a parachute behind you.

 

[Nliiitend1]

I really wish the OP would see this thread and chime in about whether or not the dealer found any issues with his car after he took it in...

 

[AutoEuphoria]

I wouldn't hold your breath.

Last activity: 10/08