need help
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Senior User
Joined: Dec 2006
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From: churchville, ny
need help
i'm usually pretty good at these problems but now i'm baffled. i had to tighten my header bolts today, then added ground from starter bolt to frame. now truck won't start. made sure no broken wires that i could see. i have spark. checked inertia switch. the only other thing i did was grease u joints. what am i missing? you can hear fuel pumps.
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From: shelocta, pa
do you have any power? maybe knocked a wire loose on the starter? or battery cable playing with the headers?
never mind I can't read today. are the fuel pumps kicking on? als why did you place a ground at the starter?
never mind I can't read today. are the fuel pumps kicking on? als why did you place a ground at the starter?
Last edited by wrenchturner; Mar 10, 2007 at 08:47 PM.
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Senior User
Joined: Dec 2006
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From: churchville, ny
i have been trying to fix my problem of not charging properly. new starter etc. tried running a ground to alt. bracket. starter works ok. spark ok. will try to get a fuel pressure reading tomorrow. i have looked for broken wires etc. no luck. i have tightened header bolts many times before with no problems. turns over ok, it seems like i'm missing something that would complete the circuit to let the engine keep running.
Last edited by str8racing; Mar 10, 2007 at 09:05 PM.
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From: Easton,Ks
The frame is not used as a ground unless you are using it for a ground for your trailer or taillights. There are a few static ground straps from the body to the frame if the truck came with a factory radio.
It sounds like you may have lost the body ground at the radiator support for the PCM Computer. Body grounds are very important, make sure the body is well grounded not the frame.
It sounds like you may have lost the body ground at the radiator support for the PCM Computer. Body grounds are very important, make sure the body is well grounded not the frame.
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From: churchville, ny
Originally Posted by subford
The frame is not used as a ground unless you are using it for a ground for your trailer or taillights. There are a few static ground straps from the body to the frame if the truck came with a factory radio.
It sounds like you may have lost the body ground at the radiator support for the PCM Computer. Body grounds are very important, make sure the body is well grounded not the frame.
It sounds like you may have lost the body ground at the radiator support for the PCM Computer. Body grounds are very important, make sure the body is well grounded not the frame.
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Joined: Jul 2006
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From: Central PA
Originally Posted by str8racing
don't you have to ground the engine to the frame? mine did not have any ground to frame from the engine or should it be to body?
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Fleet Owner
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From: Easton,Ks
Originally Posted by str8racing
don't you have to ground the engine to the frame?
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From: Concord, NC
The 94 F150 I pulled my 351 out of had a lug crimped on the ground wire mid-way between the battery and the engine block that was bolted to the frame. My 87 does not have this as far as I can tell.
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From: Easton,Ks
Originally Posted by EPNCSU2006
The 94 F150 I pulled my 351 out of had a lug crimped on the ground wire mid-way between the battery and the engine block that was bolted to the frame. My 87 does not have this as far as I can tell.
But do not ground the engine to the frame or body unless you use a cable as large or larger than the battery cables. If you do you can cause a fire or do other damage if the battery cable loses ground on the engine block and you engage the starter.
As I said above it does not serve any useful purpose to ground the frame other than to discharge static or to use for running a ground to a trailer through the frame. If you do use the frame for a ground I think I would run a better ground wire to the frame from the battery and not trust what is there now.
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From: Easton,Ks
Originally Posted by str8racing
i used a 4ga. from engine to body.
I would remove that wire before you take out the PCM Computer or any thing else. Battery to body ground good, Battery to frame good, engine to body bad.