bczee

OK.. had sometime to look into my problem with the Vette.. found out that the VAT bypass was not the correct ohms.. my bad.. miss read the resistor. So.. corrected it and all is well..

thanks everyone for there input. As usual, it was a learning adventure and some more knowledge to try and stuff in my to small and over filled brain.

Redeasysport

Glad you got it fingered out. I still can't figure how that let you start it then die though.

bczee

I am no expert on the C4's VAT system, I do know a little bit on the Gen IV F-Body and the LSx systems.

Those system will allow the car to start up for a few seconds and then die.. this is what syptoms that I had on my C4 Vette.. so.. that is what I expected once the Starter Relay and/or VAT decode module was bypass for a start up, and then the VATS kicked in to kill the engine after two seconds or so, which is what I would expect to happen.

The VATS are designed to do the same thing, But may handle it differently than the F-Body or LSx system.

If someone can explain the sequence of the Mid C4 VAT System, maybe I can learn a few more things (go slow for me..! LOL) .. or that I am wrong on what I have stated.

Redeasysport

I thought if the VATS was enabled that the starter would not turn over. Could be wrong But I do not think so.

bczee

That is why the Start Relay bypass must be wired and/or shorting the Ground (Green wire) of the VATS Decode Module (not sure how this all ties together or works yet myself, but learning).

Redeasysport

Thats right you had not only VATS but start relay jumpered.

G.WooZ

I have a qestion

if you bypass the starter enable relay and bypass the vats decoder module by the green wire to the ground is vats completely disable ??
thanks

Surfin' Elvis

Where is the VATS Decoder on my 94?