1994 Ford Ranger pcm

BLADEMAN7

MEMBER
1994 FORD RANGER
6 CYL
4WD
AUTOMATIC
156,000 MILES

Removed PCM, reinstalled jumed fuel pump and it ran. Shut the truck off and won't start, even if I jump the pump. Have power to injectors and coil. Thinking PCM? Also the part number on the PCM does not show up anywhere.

Saturday, June 19th, 2010 AT 6:58 PM

5 Replies

RACEFAN966

MECHANIC
5,029 POSTS

Ok if I understand correctly the truck don't run and you are not getting power to the fuel pump? Do you have a digital multi meter? What is the numbers on you PCM? Get back to me and we will run a couple of tests and see what it up.

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Tuesday, June 22nd, 2010 AT 10:45 AM

BLADEMAN7

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8 POSTS

F37F 18T 806 AC

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Tuesday, June 22nd, 2010 AT 2:11 PM

RACEFAN966

MECHANIC
5,029 POSTS

OK you didn't answer my other questions. Do you have a digital multi meter, are you getting power to the fuel pump and are you comfortable running some tests if I walk you through them? The part number is a 93 ECM so you need to look for one under a 93 you must have an early model Ranger. The important part of the number is the F37F AC.

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Wednesday, June 23rd, 2010 AT 9:25 AM

BLADEMAN7

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8 POSTS

Yes I have a meter and can do the test.

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Thursday, June 24th, 2010 AT 12:56 PM

RACEFAN966

MECHANIC
5,029 POSTS

I need you to check for power at the pump. This is the pink wire with the black stripe. You should have battery voltage there for 3 seconds when you turn the key on and then if you go to crank it power should come back. Now did you check the inertia switch to make sure it didn't get activated?