GEN4 Cat remove and computer issues ?

[Schulmann]

We have removed the cats and installed Belanger headers on several GEN4 Vipers. One of them (2008 ACR) is having strange computer issues. At full throttle (any rpm) suddenly the computer cuts and the engin starts severly hesitating. The car doesn't have CATs at all. Can this issue be caused by the missing cat simulator ? Usually the problem related to missing Cats is only check engin light but on this GEN4 Viper the hesitation is terrible.

We have changed leaking injectors and all spark plugs. Car is running pure 94 oct fuel.

Is there any glitch know in the 2008 computer leading to engin hesitation after full throttle ?

 

[JonB]

'''''''Can this issue be caused by the missing cat simulator ? Usually the problem related to missing Cats is only check engin light .....''''''

That is not a small issue!

You need the Mopar Stage I PCM

It can also be caused by a bad ground

 

[Schulmann]

Jon, can we fix the issue with just Cat sims ?

 

[Viperless]

Jon, can we fix the issue with just Cat sims ?

Spark plug anti-foulers work fine. I am speaking from experience. No issues with the PCM on my '09. I think your problem lies elsewhere.