95 LT1 idles and runs great during normal driving but under WOT the engine almost shuts down like a govenor until you lift. Happens most often at higher rpms. Motor is stock except intake and headers. Any ideas?

 

Could it be anything other than optispark after changing plugs/wires/coil?

 

My car did the same thing. I would mash the throttle and it would go then just shut down like i hit the govenor. I replaced the MAF and it was fine. The reason the MAF went bad was becasue I had a nitrous backfire and it fried the sensor.

I might just get a friends MAF and hook it up to see if that is the problem. BTW, the MAF is pretty common with different GM cars so you could find one at a junkyard off a truck cheap.

 

same thing happens to me b/c of my MAF. but y my MAF went bad i do not know

 

OR if you want, I have a ram air box that should be here on monday, it will come with a MAF and I will sell you one of them. PM me if your interested.

 

Thanks - I will try swapping the MAF.
Anyone know the cross reference for these MAF's (I have a 95 LT1) - if not the dealer should be able to help.

 

Any 94-97 Fbody MAF will work. You can unplug your MAF and the car will go into speed density mode. I'd just unplug it and seeing if that fixes your problem. If it doesn't then plug it back in and it must be something else.

 

yeah i unhooked my MAF and it doesnt do that anymore, so my prob is def MAF or electrical,

 

call a salvage yard. that is where I got my replacment and they said that MAF was on just about every 350 motor in any GM car. (truck, van, car)

 

They won't all work. I know the MAF off an LT1 cadilliac I got the motor out of was a much smaller diameter MAF.

 

Wasn't the MAF - back to the drawing board I guess.
In the meantime a new fuel pump when in and injectors were replaced 3 months ago. The only sensor that hasn't been replaced in the last year is the MAP sensor - can you unplug this one too as a test?

 

Sorry I was being too broad with my statement. But if you ask a salvage yard they will tell you which ones are the same.