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feul pump keeps running(help please)

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Old Sep 21, 2008 | 02:50 PM
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From: pa
feul pump keeps running(help please)
89 f250,302,with the key in the on pos. the fuel pump runs then stops then runs, and keeps doing this & doesn't start, no spark.
 
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Old Sep 21, 2008 | 04:34 PM
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From: Easton,Ks
Does it crank?
Sounds like the Power Relay is making and then dropping out.
Ignition switch maybe.
 
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Old Sep 21, 2008 | 04:45 PM
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From: pa
yes it does crank
 
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Old Sep 21, 2008 | 04:57 PM
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From: Easton,Ks
Originally Posted by towrig350
yes it does crank
Make sure the computer ground wire (black with a green stripe) has a good ground at the ground post of the battery.
If good make sure the wiring under the power and fuel pump relays is good, this seems to be a problem with your year.
If OK check to see if the power relay is making clicking sounds with the key on.
If so you may have a bad Ignition switch or its plug my be burnt down by the floor board on the column.
 
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Old Sep 21, 2008 | 05:29 PM
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From: pa
is the power relay under the hood on driveside? because their is a clicking sound with the key on. also from the dizzy.
 
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Old Sep 21, 2008 | 05:33 PM
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From: Easton,Ks
Yes the power relay is under the hood on driver side.
I do not think I have ever heard of a distributor making a clicking sound with the engine not running.
 
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Old Sep 21, 2008 | 07:13 PM
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From: pa
when it clicks is when the feul pump comes on. **** is crazy can't fig out
 
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Old Sep 21, 2008 | 07:28 PM
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From: Easton,Ks
Maybe this will help.


/
 
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Old Sep 22, 2008 | 06:10 PM
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From: pa
put a new Ignition switch on,still nothing,now fuel pump comes on one time only(like it should),tac doesn't move when cranking,shouldn't this jump?
 
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Old Sep 22, 2008 | 06:22 PM
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From: Easton,Ks
Check for power at the ignition coil with a test light, the tach side should flash while cranking and the other side should have power on it at all times the key switch is on.
Also check to see if you have power at an injector, any injector, both sides should have power with engine not running.
 
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Old Sep 22, 2008 | 07:47 PM
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From: pa
tach side goes dim when cranking
 
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Old Sep 22, 2008 | 07:53 PM
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From: Easton,Ks
Is it cranking very slow?
 
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Old Sep 22, 2008 | 08:09 PM
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From: pa
cranks over fine
 
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Old Sep 22, 2008 | 08:27 PM
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From: Easton,Ks
It should flash, maybe a bad TFI module.
 
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Old Sep 22, 2008 | 08:41 PM
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From: pa
thats new too.had them test it said it's good
 
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