Chevy_enthusiast23

Just today i was getting in my car after work and was driving out of the parking lot, didnt get into the throttle or boost too much, but when i turn on to the main road to get rolling with traffic, i ran it through 1st and into 2nd.. Full throttle in second reaching about 4k RPMS it quiet literally fell on its face.. The car stopped all acceleration instantly.. Very violent. And every since i cant run up a gear past 3500RPMS without experiencing this issue, mostly when you try to go full throttle.. Does anyone have an idea of what it could be? Im think the spring in the BOV.. The car pulls fine when you avoid WOT. Drives just fine when you short shift.. You can get into about 10psi of boost before it will start to act up.. Im running GSM1.. Any ideas.. Any help would be much appreciated.

footballplaya3k

iTrader: (1)

Boost blow out? How are the plugs?

63 Nova SS

iTrader: (3)

So you are on a gms1 tune and are running a bov? For how long? Didn't know you could do that.

turbocharged717

^ I believe that is no good until big turbo

Chevy_enthusiast23

No no, my mistake.. Not a BOV.
All the car has done is GMS1. Everything else is stock.

Chevy_enthusiast23

Bpv*

tomj77

iTrader: (2)

Here is ur first issue. DONT get on ur car right after u get into it. I'm sure ur car didn't have enough time to get to running temp on ur drive out of the parking lot. U keep that up Ull break more stuff

blueLNFftw

iTrader: (16)

You are losing boost readings to the PCM.
Scan for pending codes.
Clean your MAF.
Clean your MAPs.
Make sure your GMS1 pig tails were connected properly; soldier and heat shrink if they are spliced in.

tomj77

iTrader: (2)

Let me guess u had a flashing engine light when this happened? Massive misfire check for pending codes.

nismopowerdqg

sounds like your hitting a fuel cut, possibly big boost leak and running to rich as you get higher into rpms, boost leak test it and go from there. take it to a shop and get them to run smoke through it and see if it come out anywhere.