Cuts out at WOT

[WhiskeyGN]

finally got my GN plated and was driving it around today, at about 7/8 consistent throttle, no problems, acceleration, no knock. If I slam it to the floor though it'll cut out about 2 seconds later. No knock, 800mV. What gives?

 

[SHADOWII]

Are you still running the boost control valve? Usually attached to the valve cover on the passenger side. I would toss the hyper chip and purchase a TT chip. Boost level?

 

[WhiskeyGN]

No to the boost valve. I'm running an adjustable boost controller. 13 lbs and 41lbs of f/p hotwire etc

 

[BEATAV8]

what spark plugs and what gap?

 

[turb0buick57]

My moneys on the hypertech chip if your still running it. Had 2 older technology chips from the 90s that would do the same exact thing. New chip, problem solved.

 

[SHADOWII]

No to the boost valve. I'm running an adjustable boost controller. 13 lbs and 41lbs of f/p hotwire etc

Is the fuel pressure set w/vacuum line off? and it should rise 1# for every #of boost. =54#'s @ wot. Most chips require 43-45#s f/p w/line off.

 

[BGNeXtreem]

My bet is on the tranny flaring if you let out of the throttle and ease back into to it does it pick up and go?

 

[spooledyou]

check ur fuel pressure at wot, if it starts dropping while under boost , its ur fuel pump.

 

[WhiskeyGN]

It's increasing pressure as it builds boost, but its not doin it just at WOT now, its kinda random. I'm not losing f/p when it happens either, it just kinda stumbles for a second. So ill hammer it on time and itll be fine, but ill cruise at like 1/4 throttle and itll stutter here and there.

 

[turbo nasty]

Fuel filter?
Verified risen rate fuel psi?
Whats your maf coumts during this?
Last time tune up?
Ic hose connections?

 

[TurboBuRick]

Sounds ignition related.

 

[WhiskeyGN]

My moneys on the hypertech chip if your still running it. Had 2 older technology chips from the 90s that would do the same exact thing. New chip, problem solved.

That's exactly what it was, put the old ecm back in and now its fine. Thanks guys