I recently had a problem getting all of the air out of the fuel system for the engine to run reliably after cleaning the fuel tank and replacing the filters. It would run for a while and then stall out after a power drop.
When I got a mechanic to look at it, he turned the lift pump on and immediately said that the problem was with the lift pump. He also commented that having the lift pump mounted higher than the primary filter was not a good thing . He used the hand priming pump on the top of the Racor filter for quite a while and was able to clear air from the system. Then it started and ran fine within about 30 seconds. Now I know the proper way to prime the system after watching him .
I am looking into rearranging the lift pump and the primary filter so that the lift pump will actually be a little lower than the primary filter. The problem seems to be that air still in the system can more easily collect in the lift pump and airlock it when it is higher than the primary filter.
Has anyone else had an issue like this or ideas on it ?
-- neal
'88 E34 KOKOMO
When I got a mechanic to look at it, he turned the lift pump on and immediately said that the problem was with the lift pump. He also commented that having the lift pump mounted higher than the primary filter was not a good thing . He used the hand priming pump on the top of the Racor filter for quite a while and was able to clear air from the system. Then it started and ran fine within about 30 seconds. Now I know the proper way to prime the system after watching him .
I am looking into rearranging the lift pump and the primary filter so that the lift pump will actually be a little lower than the primary filter. The problem seems to be that air still in the system can more easily collect in the lift pump and airlock it when it is higher than the primary filter.
Has anyone else had an issue like this or ideas on it ?
-- neal
'88 E34 KOKOMO
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