I replaced both transfer/main fuel pumps and main still whines on 1993 Volkswagen Cabriolet

I originally put new main pump on which started whining after a week of driving and got hot and quit. I just replaced both transfer and main pump and after idling about 10 mins the main pump got hot and started whining. It will go away after a few seconds and pump will cool then start heating up again and whine. I replaced both pumps with quality parts. I don't know where to go next

by in Sidney, NY on July 23, 2014
1 answer 1 comment
ANSWER by on July 23, 2014
Check wire connections at the pumps, got to be clean and tight! Car running ok?
COMMENT by on July 23, 2014
Car runs fine. I'll check connections. I checked plug at fuel pump and it's fine. Put a new gas cap on and oem filter. Just ran it and main pump is still getting hot. I did check flow on new transfer pump and is well within specs. Any ideas would be greatly appreciated Good news the fuel pressure regulator was bad.

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