Reply to "Help... EFI Engine problems"

54 pound injector sounds real high. I am running a 351W stroked to 427 and it runs just 36 pound injectors in a multi-port setup on a vic Jr manifold running fuel rails.

The pulse width as indicated in a prior post is a critical measurement in the injectors load factor. If they are being over worked, or perhaps in your case, under worked, it could create fuel issues. Use this to judge the right sized injector, Like a carb too bad is as bad as too small.

You will need to use your laptop and look at every sensor. TBS, Man pressure etc, if one of the sensors is off or acting up it could create an inbalance. Also how does the fuel map look, nice and smooth with no peaks or valleys? Did you play with the spark map? Are you dialing in too much advance or retard at that RPM/Manifold pressure?

The good and bad about fuel injectors is the tunability too many knobs to twist.