EEC-iv or fuel pumps

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Dec 21, 2008 | 11:31 AM

trismo14

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EEC-iv or fuel pumps

hi I am only getting 4.5 volts at my fuel pump is this normal? I tried replacing the relays for the fuel pumps and also the EEC. then did a ohm check on the pump and they are also good, and also inertia switch was checked. any suggestions

Dec 21, 2008 | 11:42 AM

quicklook2

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From: Lakewood, Ohio

i have said it before and will say it again:

less info means less help.

more info is needed from you.

Dec 21, 2008 | 12:09 PM

trismo14

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ok here is what i have sone so far
i checked both relays (fuel and eec and replaced both)
replaced the inercia switch
checked the fuel pump on the rail and it is good and also checked the front fuel pump and that is also good.
I was wondering if the volts at the fuel pump on the rail is to be 4.5 or over 10.5

Dec 21, 2008 | 12:23 PM

quicklook2

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From: Lakewood, Ohio

year, engine etc. for truck is needed.

when did this start?

what was it doing?

Dec 21, 2008 | 12:23 PM

Lazy K

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What truck, what year, what engine?

Dec 21, 2008 | 12:27 PM

trismo14

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sorry about that its an 1987 f150 with a 302 efi. I just bought the truck used the guy told me it needed a fuel pump but they are good

Dec 21, 2008 | 08:34 PM

EPNCSU2006

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From: Concord, NC

Start at the relay and work your way back to the pump, checking the voltage at each junction until you find where it drops significantly. Then you will know roughly where the problem is. Are you forcing the fuel pump relay to activate when you are testing voltages?