I bought a used comptech supercharger with aftercooler about a month ago. I installed it and have about 100 miles on it since i installed it. I took a cruise this morning and the car started to stall when i hit the gas. I got up to about 5000 rpm when it started to do it. I parked it right away and let it sit for about a half hour. I again tried starting it and started to stall right away without even pushing on the gas. Im thinking its the spark plugs since im still running the stock ones but im not sure. Any suggestions anyone?

 

what psi belt/pulley?

 

I got a stock comptech pulley and a gator belt on it.

 

check your belt, soldered connections, oil level and spark plugs.

running stock ones are ok FYI.

 

The belt is fine,connections are fine,the oil level is right up to the top line,and i replaced the spark plugs and the car is still stalling.

 

Are you tuned?

Take a picture of your FPR (fuel pressure regulator). It's the red thing. You may be running rich and fouling your plugs.

Especially if the previous owner was running a slightly different psi or plugs.

 

Here the fuel pressure regulator:

 

DAMN!!! That screw is backed out a LOT. If you screw it down (allen wrench) it richens things up. It depends on whether that's the stock screw (because there are different FPR screw options).

I'd check your spark plugs to see if they're white or black. It'll tell you if you're running lean or rich.

I'd recommend changing your plugs anyway (NGK coppers $1.50 each, only takes 15 minutes with standard hand tools).

Then going to get it tuned before something bad happens.

I'd consider screwing that allen bolt in almost all the way down, then pulling the ECU fuse to reset it in the meantime.

 

The stock plugs where white which is running to lean correct? Well, ill screw the bolt all the way down and then pull the ecu fuse to reset it.

 

Personally, I wouldn't touch anything without an A/F gauge of some kind (a dyno will be best).

You might have an aftermarket screw in there and by screwing it down all the way, you might flood your engine with fuel.