Hey guys, I have a question about the VATS system. I just did a TPI swap into a 68 CHevelle. When I tried to start it, it wouldnt start...it just cranks. I had a spark but it looks like no fuel is entering the engine. I have pressure in the lines and rail, but nothing in the cylinders. The engine is from a 1990 GTA. My question is about VATS. I bought the engine from a wrecked car. When I pulled the door on the ECM it had a hypertech chip in it. I was told that aftermarket chips do not support the VATS. Ironically, the engine wont start, and it appears that I have no pulse from the injectors. Do you think I need the VATS bypass even though I have an aftermarket chip. Anyone else ever run into a problem like this?

 

There's a good tech article on VATS linked from the thirdgen.org homepage.

 

I have a TPI specialties speed density prom for an L-98 with vats delete if you interested.

 

in response, I know exactly the way the VATS works. My question is does an aftermarket chip eliminate the VATS coding? I was told it does but it seems like thats the problem. Everything else is working fine. I didnt look into it too much after it didnt start because it was getting late. I have a VATS bypass module but thanks anyway.

 

all the hypertech chip does is alter timing curves i believe the vats is programmed into the computer or you could burn your own chip to disable the vats but the bypass module is the easiest way to go

 

fyi, it was the bypass module...no big deal...thanks