Fuel flow problems

[rwenner]

Paul

I have settled on the by-pass valve in the Aux pump as the problem. We recently checked the flow of each Aux pump (gravity flow into a bucket) and found the flow was considerably less thru the front aux pump, so we switched the aux pumps front to rear. The problem moved with the pump to the rear engine. I just finished installing a new aux pump in place of the one with low flow. ground check and low alt flt. test were ok, but that is not the conditions I was having the problems with. I will be going to Houston this week and will let you know the results. I did note a difference in the mixture controls this last flt....they are evened up again for the same gph flow where as before I had to leave the front set higher to get the same gph flow