Spark plug fouling

[eschaider]

Originally Posted by twobjshelbys

Ed, I respectfully disagree. It seems that every time this comes up you're trying to sell a new system. This engine ran when it left Roush. Fix the external issue and the ECU will do a fine job given his location and usage.

I don't necessarily disagree with the find the issue and fix it approach, Tony. In this situation one of the components is old and its function (which may be the source of the whoops) could easily be compromised. The diagnostic tools other than a remove and replace approach are pretty thin for that generation of EFI system

I normally only encourage replacing an EFI system for a more current system if it was antiquated or severely damaged. 169mph appears to be wrestling with either an early (antiquated) Accel DFI system or an early FAST system. The replacement rationale looks like this ...

Irrespective of the manufacturer, the diagnostic and tuning tools available are more limited because it is an early-generation EFI system that is misbehaving. The probability of a compromised 'successful ending' that would result in a replacement purchase after the fact is high. The monies spent following that solution path would be more, and the result would be the same as abandoning the antiquated system at the front end and using a current technology replacement..

I am attempting to encourage 169mph to pursue a solution that will provide a similar (likely better) result with less frustration, less time and less money spent.