Fuel pump question
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New User
Joined: Oct 2005
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Fuel pump question
I drove my daughters truck ('96 F150) to the store earlier today and it drove fine- no different than it ever does. Tried to crank it to go home and it turns over like it's going to crank, but won't. Seems like its not getting any gas. Maybe the fuel pump? Any suggestions? Anyone know if the fuel pump is in the tank of a '96? It got dark before I could look at it. Any help would be appreciated.
Senior User
Joined: Dec 2001
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From: Michigan
You say it turns over like it's going to crank. Does it turn over? but won't start. Is your foot off the gas pedal, if not the throttle position switch will not feed it gas. When you turn the ignition switch on do you here the fuel pump run for a second.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
The fuel pump(s) are in the tank(s). One of them will run for one second when you turn the key to on, have someone lesson when you do.
From then on you need a PIP pulse from the Distributor to the PCM for the PCM to ground the Fuel pump relay to turn on the pumps again.
From then on you need a PIP pulse from the Distributor to the PCM for the PCM to ground the Fuel pump relay to turn on the pumps again.
Post Fiend
Joined: May 2004
Posts: 11,289
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From: Lakewood, Ohio
fuel pump is in tank.
does it have two tanks?
check relay in power dist. box by air cleaner relay #2
also in same pow. dist. box fuse #16
spray ether into throttle body, small amount to see if it starts.
also the fuel cutoff switch is behind or above pass. side kick panel.
does it have two tanks?
check relay in power dist. box by air cleaner relay #2
also in same pow. dist. box fuse #16
spray ether into throttle body, small amount to see if it starts.
also the fuel cutoff switch is behind or above pass. side kick panel.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Originally Posted by 51frrdtrk
Is your foot off the gas pedal, if not the throttle position switch will not feed it gas.
Would you mind explaining what you are talking about, as this is the first I have ever heard that the TPS tells the PCM to turn on the fuel.
The PCM uses information from the TPS plus other sensors to adjust the amount of fuel the injectors inject after it is running.
