1997 Ford F-150 won't start

CHUCK EVANS

MEMBER
1997 FORD F-150
4.2L
6 CYL
AUTOMATIC
167,000 MILES

Pickup started cutting out some then wouldn't start. I couldn't hear the fuel pump so I replaced it and the fuel filter. The pickup started, I drove it a few miles and it ran good but after I turned it off it's doing the same thing, it turns over but wont start. I checked the fuses and the fuel shut off switch and they're ok, could you please tell me what I need to check now. Thank you for any help you can give me!

Sunday, April 5th, 2015 AT 2:23 PM

3 Replies

JDL

MECHANIC
16,098 POSTS

Before you replaced fuel pump, did you check proper voltage and ground at the pump? Did you use a gage and check fuel pressure, engine cranking.

With engine cranking, did you visually check for spark at the spark plugs and fuel injector pulse? If your missing all three, check for rpm signal.

Some fords have trouble with maf sensors. I'm not saying replace anything, you need to do some more testing.

Can you check for applicable trouble codes?

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Sunday, April 5th, 2015 AT 2:54 PM

CHUCK EVANS

MEMBER
16 POSTS

Well someone stole all of my tools, so im pretty limited with what I have to work with right now. I haven't been able to check the codes but I'm trying to find a code reader I can borrow. Im not getting any fire at the plugs, I checked the crank sensor with a multi meter and the ohms reading was around 35-35. Is that OK or could that be my problem? Im trying to get answers for you to your other questions and ill let you know what I find out as soon as I can! Hopefully tomorrow! Thank you very much for your help!

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Monday, April 6th, 2015 AT 7:38 PM

JDL

MECHANIC
16,098 POSTS

Sorry for the late reply.

At the coil pack, red wire with lt green tracer is voltage, goes hot with the key on. Any voltage there? The other three wires at the coil pack are grounds, one ground for each coil, each coil fires two plugs.

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