Neil
2003 Mercury Marauder - DBP/DC
#195, Eaton Swapped, Waiting for an Engine
2003 Mercury Marauder - BLK/DC
#2821, 80K Mile Tagalong 2 - Wife's Daily Driver
2004 Mercury Marauder - DTR/LF
#963, 316K Miles, Aviator Engine, Daily Driver
1964 Mercury Marauder - BLK/BLK
390FE, 4D HT, Staggered 18's, Tuna Boat
1986 Buick Regal Grand National
Stock Block/Heads 11.08 @ 122.39mph, 25psi
Originally Posted by Zack 
The only diagnosis is changing it.
I have one if you need it.
The AEM pumps don't burn up FPDM's
Diagnosis at my house is inspecting wires. Drink a beer. Talk about what to do next. Drink a beer. Call Jaydees to bring over his spare FPDM. Drink beer waiting for him. When he shows up with the part look at it and say hold my beer while I get in the trunk. Replace part. Cannot test drive because............ Diagnosis.