93 4.0 fuel pump runs with key off?


87RangerXLTct

15+ Year Member

Joined
Aug 20, 2009
Messages
196
Points
3,101
City
Connecticut
Vehicle Year
1987
Engine
2.9 V6
Transmission
Manual
Total Lift
Stock
Total Drop
Stock
Tire Size
235/75/r15
Alright so a few things I’m dealing with. I bought this truck not running supposedly the shop I bought it from had it running, they said it needed a fuel pump and injectors. It was sitting for like 20 years. Just put a new pump and injectors in it. The truck won’t start off the ignition key, it’s a manual transmission I’m thinking the safety switch on the clutch pedal is causing that? No big deal I jumped the solenoid with key on. The pump runs continuously even with key off, I tried swapping relays with the a/c relay and it still does the same thing. I noticed the fuel pump relay was getting hot so I’m assuming the contacts are stuck closed?
Only other thing I can think of is maybe it needs a new ecm?
Kinda not sure of where to start troubleshooting this?
The new pump is a Delphi unit.
Any help is greatly appreciated!
 
Should’ve probably posted in the fuel systems forum, not sure how to change that
 

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