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1989 Ford F-150 starting problem

Tiny
CATMASTER500
  • MEMBER
  • 1989 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
I have a 1989 ford f150 5.8 litre with 150000 miles on it. Reciently it blew a head gasket. So I bought a rebuilt motor & put it in. Im having a starting problem with it. It's not a new problem, it was doing it before I replaced the engine. It starts fine when its cold, but after getting up to normal tempature it turns over like it has a dead battery.I load tested the battery. It tested fine. I replaced the starter, alternator, all the battery cables, the selenoid. I also checked & double checked the timing. Im at a loss here I have hundreds of dollars into it & cant figure this out. Can someone help me please.
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Thursday, March 25th, 2010 AT 8:47 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Is the starter protected from the exhaust? It could be getting hot and causing this to happen.
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Thursday, March 25th, 2010 AT 9:20 PM
Tiny
CATMASTER500
  • MEMBER
  • 3 POSTS
Yea I thought of that too. No it didnt have anything so I put some insulation off of a junk car to try it,
& see what it would do & the stuff I put on didnt make a difference. Im gonna try to get a metal heat shield & try that. Thanks
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Friday, March 26th, 2010 AT 6:01 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Are you sure it is like a dead battery or could it be a timing issue?
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Friday, March 26th, 2010 AT 7:13 AM
Tiny
CATMASTER500
  • MEMBER
  • 3 POSTS
I load tested the battery & double checked the timing! I even went as far as taking the battery out of my wifes van & trying it in the pickup with no luck. That should of eleminated the thought of a battery. Like I said im at a loss here. I just got a huge chilton's manuel from the library yesterday. Its pointing me towards a fusable link or ignition switch. That is what im gonna try next. Thanks
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Saturday, March 27th, 2010 AT 4:39 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It could be the ignition switch, but it if makes contact, I don't know why it would cause the starter to turn slower. Regardless, let me know what you find.

Joe
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Saturday, March 27th, 2010 AT 8:08 PM
Tiny
CATMASTER500
  • MEMBER
  • 3 POSTS
Yea im sure about the timing & all the obvious stuff, I just found out what it could be I just have to find time to check it out. A mechanic just told me it could be the fuel pressure regulator. I thought he was nuts, but I talked to another mechanic & he verified that he has seen fords do this also & it turned out to be the fuel pressure regulator. But thanks for your help! Jon
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Wednesday, April 21st, 2010 AT 3:34 PM

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