Quote Originally Posted by 34_40 View Post
Sounds like you're on the right track. Read the plugs and try to isolate the offending cylinders. Maybe investigate the value of say, 4 injectors, then the cylinders that are questionable, replace those and see if you were right.

Sometime back, maybe in the summer..??..?? there was some discussion of adding acetone to gas and reportedly it does help clean injectors very well. I think there is/was a couple of videos on U-tube where guys fabbed a simple tester / cleaner setup fwiw...
Yeah, I guess this will be another learning experience. Looking at Summit, the 35# Edelbrock injectors are $57 each, or $336 for eight which is a savings of $15 per injector!! I was a little shocked. As I understand them at this point the injector has a needle valve (pintle) which is closed by spring pressure, and opened by a strong little solenoid coil. That coil has a duty cycle of a few milli-seconds, so if you power them "ON" to "test" them you can burn them out in a heartbeat. I had thought that the pressure was holding with the ignition "ON", but that's not the case. The system primes, pump goes "OFF", and rail pressure falls. Now I'm thinking that if I prime the system and let it bleed down several times, then pull the plugs I'm going to find some wet plugs in the offending cylinders. Hope I'm not over analyzing this....