Question on loosing fuel pressure going down track.

[cmracing]

Originally Posted by Ed Wright

Been doing this many years, (not just my race car) I have never encountered that.
Misfires do look lean.

Pull a plug wire off sometime and watch the wideband sensor. You will see the same thing happen as if you unplugged a fuel injector instead of pulling the plug wire.

The too rich showing lean though, that can be tricky to diagnose. A N/A engine will typically be falling on it's face though, but on a forced induction it can be misleading, therefore plugs and collectors are the best thing to determine the root cause.