Cars bucks then shuts down as I'm easing into boost

[Dennisn]

So just recently having an issue with the car. If I ease into the throttle as she starts to make boost the car will buck (pretty violently). Then die and won't restart until I do a kam reset. When it happens it'll show wrench light and car won't do anything. Showing no codes via the sct. Originally thought maybe a wheel speed sensor might be acting up but disabled the nannies via pulling fuse and it's still done it. It's also as soon as the tires would start to break loose. (Again only easing into gas about when the boost kicks in).

I've tried datalogging when it happens but it just flatlined the whole log when it happened.

Was talking to a guy mentioned he'd heard something like this with boost and load at part throttle. Anyone experience any similar issues?

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[Tommy V]

I had that happen,my car would not shut off though,but would buck bad.Especially in track mode,if i left in in normal mode is was not as bad.When looking at my logs my pedal position sensor was reading50% percent throttle and my actual throttle was reading wot.It was going to wot before it could get to full fuel enrichment.Jon adjusted my tune and it seems good now.

 

[Dennisn]

I had that happen,my car would not shut off though,but would buck bad.Especially in track mode,if i left in in normal mode is was not as bad.When looking at my logs my pedal position sensor was reading50% percent throttle and my actual throttle was reading wot.It was going to wot before it could get to full fuel enrichment.Jon adjusted my tune and it seems good now.

That's kinda what the guy I was talking described happened to his car. Same thing his wouldn't die though. Not sure if it's same issue I'm having. Mine feels driveline related but I can't say for sure. Still not sure if mine might be a hardware issue though. I'm guessing there are a number of things that could potentially cause my problem. Diff or trans messed up. It's bad when it happens.

 

[Tommy V]

That's kinda what the guy I was talking described happened to his car. Same thing his wouldn't die though. Not sure if it's same issue I'm having. Mine feels driveline related but I can't say for sure. Still not sure if mine might be a hardware issue though. I'm guessing there are a number of things that could potentially cause my problem. Diff or trans messed up. It's bad when it happens.

Yea with it shutting off i would check all your electrical connection.I would not think its the diff or trans.Do your logs show anything when it happens???

 

[Crackerjack17]

Funny you guys are talking about this, because just today I was in heavy traffic on i81 and kept inching forward in 1st gear and all of a sudden I heard a what sounded like a backfire in the intake and the car started bucking, struggling to idle, threw the wrench up on the dash and shut off. Pulled over, shut it off. Checked the codes, I didn't write them down, but it was like couple codes for torque management, etc. Cleared them restarted it and drove fine. Now the last time it did this to me was when I first installed the kit and one of the hoses popped loose. I checked all the connections and can't see anything loose. Did a pull and hit ~6 lbs boost, so I'm pretty sure nothing loose. Gonna look it over when I get home.

 

[Tommy V]

You probably spun the wheels a little and traction cut in just as u were building boost and caused a backfire.If u have the procharger tune even with traction control off the car still uses quite a bit of torque mangment.U should be fine,check all your piping though.

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