Fuel System doesn't react to mani pill changes

That all depends on what your former ignition system was putting out -------- maybe your spot on tuneup was with a weaker mag/coil, bad coil wire ,what did you change and when did you change it ?

 

check valves

You don't have your pump saver and idle check valves switched by mistake do you?

 

Is this happening to all three motors?

 

I did flow the whole system and hindsight, since it was intermittent problem in the beginning, I happen to flow it when it we working fine. Keep in mind it takes me about 3 hours just to get everything off the engine and onto the flowbench, not including running it and then putting it all back to the engine. Between 9,000 miles, 29 events (in a 90 day time frame), 5 engines, a real job and wife/kids, I need to be efficient with my time...

Pumps, I did flow and yes the first one was going away, but was it from sucking air or from something else. Enderle has now told me it probably won't hurt the pump to suck air.

I have now made 4 runs in a row, after changing the pump inlet fitting o-ring, and the problem is gone. I will definitely pay more attention to that o-ring from now on

PS I have wore out pumps on the flowbench and for every question I answer I create 2 more... I guess this is called learning.

I'd like to thank everyone for there suggestions and ideas!

 

ITA=great help with lots of info !!!!!!!!