I have a built gsr turbo tuned on C16. Car was making just over 500whp on stock ignition components. Dyno tuned great, no issues, made 5-10 passes no issues. 11th pass in the water box at part throttle car was cutting out, almost sounded like detination. I made the pass, in 4th gear car cut out completely almost like boost cut.. I changed the distributer, spark plugs, tightened the gap, new fuel... Problem is getting worse. Tune looks good on the computer/chip, had it back on the dyno, could not duplicate the problem...

Any thoughts?

 

maybe its just blowing out the spark...whats your gap?

 

.0015

 

Sounds like ignition is going. Stock can only last so long based upon the use (and subsequent abuse) of the ICM and Ignitor. Might be time to upgrade if you're going to continue to put the ignition through this kind of pace.

 

Thats what I was thinking also, I replaced the diz and it didnt make a difference.

 

You need more than that now... its time for UPGRADED ignition not just "dizzy swaps".

 

Get a M&W kit from T1 and save yourself the headache with blown ICM's. Good luck

 

one time i thought i had the same problem... it would be fine when cold, but once it got warm it would start to do what i thought was ignition cut or some kind of ignition problem.

turned out to be valve float and i busted a retainer and dropped a valve.

 

Try a new OEM igniter/coil first.
You mean .015" not .0015" I hope

 

What kind of map sensor do you have?