Discussion Starter · #1 ·
Working on a 92 4.9. It is flooding badly. It will not run more than a minute before stalling. I went through the manual and checked out the great post in Tech on the FPR. The vacuum line is open. No fuel is evident at the nipple. Fuel pressure initially is 42 and slowly leaks to 0 over say 25 minutes. The injectors are new OEM. I did not get to try capping the return off and checking pressure drop. (We had a little car and air show in town and I ran out of time) But I did pull a vacuum on the FPR diaphragm. Or tried to. I noticed someone asked if the FPR was bad if the diaphragm would not hold a vac even with no fuel at the nipple. I didn't see an answer. This one won't even go into a vacuum! I can check the one on my car. But if someone knows offhand it'll save me some time. Thanks.