no start
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Joined: May 2011
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no start
I am a new member and have a problem maybe you can help me with.I have a 1987 4x4 f-150 , 4speed.I have a no start but cranks fine.no pulse to my coil or injectors.I have performed all kinds of electrical test,resistance,continuity,ect.After all that I got frustrated and replaced the following.Coil,Module,Pickup,Rotor, pcm. Still nothing. I have not replaced the eec,or fuel pump relay yet.The fuel pumps come on when the key is turned on and don't go off after 5 seconds that is why I replaced the pcm because that has the timer inside it for the injectors,as per a response that was posted on the forum. Any help would be appreciated.
Last edited by Ricky Racoon; May 25, 2011 at 11:32 AM. Reason: title
Elder User
Joined: Jul 2010
Posts: 960
Likes: 3
From: Saint Charles, Missouri
First off, Welcome to the forums!
If the fuel pump doesnt turn off within like 1 secong theres a problem. Replace your FPR and see if that dont do the trick, had the same problem 2 months ago.
BTW, are you getting spark after all those replacements?
If the fuel pump doesnt turn off within like 1 secong theres a problem. Replace your FPR and see if that dont do the trick, had the same problem 2 months ago.
BTW, are you getting spark after all those replacements?
Fleet Owner
Joined: Aug 2005
Posts: 23,666
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From: Easton,Ks
But the fuel pumps will run all the time even with the key off.
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no start
Well I put on a fuel pump relay and the pump still runs all the time and still no start.Do you have any other ideas? I'm out of ideas.
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Lead Driver
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misewell get 2 of em while youre there. theyre 20 bucks at my local yard. 40 is still nothin when youre losin your mind chasin down problems. the truck coulda wound up at the jy cuz the last guy had a fried eec and got tired of dumpin money in it. getting 2 minimizes this chance. my .02.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Has the fuel pumps ran all the time the key is on as long as you have owned the truck?
If so sounds like someone has rewired the fuel pump relay circuit.
You will have spark with the computer unplugged.
Maybe you have a bad PIP sensor on the stator inside the distributor.
If so sounds like someone has rewired the fuel pump relay circuit.
You will have spark with the computer unplugged.
Maybe you have a bad PIP sensor on the stator inside the distributor.
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