ive got a 91 ford L6 sometimes it will starrt other times it wont. my fuel pumps are working my starter solinoid is good ive got good voltage. when i turn the key to the on position the fuel pump SHOULD run for a few seconds then stop when the fuel pump relay should click on and shut it off but it it doesnt . the fuel pump relay will click erraticly along with other sensors. ive replaced all the ones that are clicking but to no prevail. im at a dead end and dont know where to go. please help.

 

So what is the condition of the wiring to the EEC and fuel pump relays?

I'm assuming when you say L6 you mean the 300 inline?

Adrianspeeder

 

the wiring is dusting but intact, nothing is exposed or touching where it shouldn't be, and the same for the relay. I cleaned out the relays that were clicking with an electrical cleaner and saw no improvement. I keep coming back to the Idea that my ECM might bad but I have very little knowledge of the ECM systems and cannot find anything on how to test if they are bad. is there a way?

yes I do mean the 300

 

Well I don't have my wiring diagrams with me on a TDY right now, but in the haynes manual has the diagram. You would want to check for power from the fuseable link off your fender solenoid to the eec relay, the 12v that is triggers the eec relay from the ignition switch, 12v out of the relay to power the eec itself. Then right next door the fuel pump relay also is powered from the fuse link bundle and is triggered by the eec.

Adrianspeeder

 

my meter died have to get another one. my Grampaw suggested changing the EEC relay, which worked.. for a bit, then my fuel pump relay started ticking again..

 

It has gotta be a loose socket or intermittent connection that worked while you forked around with it.

Head over to napa and get these pigtails and relays. Swap both the FP and EEC and you should be good to go.





Adrianspeeder