Car Jolting When Hitting Boost

[klenn]

Hey guys took my car for a bit of a blat on sat nite through some mean windy roads on the boost, on the brakes, on the boost,on the brakes etc went for quite sometime probly half an hour not absolutly ringing my car out but not taking it that easy either. near the end my car started joltiong as soon as it came onto boost so I pulled over and my turbo was glowing red like a peice of metal when you heat it up with a gas torch. I take it this is bad and I was giving my car abit much?......

So when the car goes to boost on high boost now it jolts but no lights or anything come up on the dash so nothing seems to be cutting out, idles fine etc. It is a series 1 gtst with standard turbo fmic bigger fuel pump etc. When the car jolts the boost jumps back from 12 to 5 psi.

Just wondering what you guys think and if this is the turbo which I think it probly is?I will check all the hoses etc incase of boost leak.

Cheers guys any help on this would be much appreciated.

Edited June 17, 2007 by klenn

[Ultimategtr]

wont be the turbo. any sign of smoke? whining etc?

i would chck plugs to see what cond they are in

[klenn]

wont be the turbo. any sign of smoke? whining etc?

i would chck plugs to see what cond they are in

Cheers man the plugs were checked not long ago but I will check them again. could it be the airflow meter if the hot hot air was blowing back into the filter? no no noises but normal boost noises and no smoke that I could notice it was at nite tho.

[Ultimategtr]

turbos get very hot by their sheer nature.. it could be the afm but i wouldnt place my life on it..

how bad is the jolts.... does it feel like a misfire? or more like a afm/boost cut(r33's only have afm cuts)..

does it still jolt if u ease up the throttle while driving or if u only floor it all of a sudden?

[klenn]

turbos get very hot by their sheer nature.. it could be the afm but i wouldnt place my life on it..

how bad is the jolts.... does it feel like a misfire? or more like a afm/boost cut(r33's only have afm cuts)..

does it still jolt if u ease up the throttle while driving or if u only floor it all of a sudden?

There quite noticable, like you jolt in your seat. it feels more like a afm/ boost cut.....

If this is the case im saying its the computer cos thats ratted out once before and the autosparkie repaired it.

[bubba]

If you think that is the case have you checked ecu plugs? also maybe check AFM plug? something could be moving around a little when you jump on the gas.. does it do it at any particular point you have noticed? (i.e. 4250rpm with 10psi and half throttle? etc etc) If you can narrow down when it is actually occuring and in with what conditions it might help these keyboard cowboys with their diagnosii

[Ultimategtr]

lol @ keyboard cowboyz.