Question about 1988 Ford F 150

4 Answers

1988 F150 wont start

My fuel pumps, volt meter and i think my spark all went out......when i hot wire my pumps they work but then my truck still wont fire on the fuel that it is getting....i went out and spent $100 on the relays on the driver side fender....what should i do....i got some advise about a fuse wire??? is this right

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  • circleburner Jun 18, 2008

    well i checked the fusable links and i do have power on both sides of them. Is the ignition module supposed to click twice when the truck is turned on (it is the grey box mounted there rite?) another little tidbit about the truck is the fact that it was wired for propane use before i aquired it and although it had already been changed back there is still a switch that can be used to kill my truck. But, as it stands that switch was not touched when my truck quit on me. I was driving down a backroad home (gravel) got to an intersection and the darn thing died....Any other suggestions by chance?

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4 Answers

The kill switch is under the passenger side dash on the side towards the door and the positive cable should have a little wire goin to it if that is not connected then the truck wont run mine does it too

Posted on Aug 06, 2008

The kill switch is under the passenger side dash on the side towards the door and the positive cable should have a little wire goin to it if that is not connected then the truck wont run mine does it too

Posted on Aug 06, 2008

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I think your fuel pump kill switch tripped. It has been a long time since I had my truck, so, I can't remember where it is. The best clue is the bumpy road.

Posted on Jul 21, 2008

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Check the positive side of the battery for a burnt fusible link. It looks like a wire but when it's over loaded if burns in half. Look at the pos. battery side of the starter solonoid you'll see a few of them there. Check your ignition module as well. This controls the coil and distributor and is mounted to the driver side inner fender.

Posted on Jun 13, 2008

  • Lee Quiroz
    Lee Quiroz Jun 20, 2008

    You may have a bad connection that when you hit bumps and such that it activates the kill switch. Check your ign. box. The red wire should be constant hot and the white wire is turned on by hte ign. sw. Check for power coming out of the box going to the dist. and ign. coil.

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My 1998 ford f150 xlt 4x4 V8, engine turns over but will not start, I think the fuel pump fuse is bad,or the reset switch malfunctioned . Any suggestions


What makes you think fuel pump fuse is bad or the reset switch ? ( inertia fuel cut off switch ) Did you test for B+ volt or are you guessing ? Buy yourself DVOM - digital volt ohm meter an test the fuel pump electrical circuit ! Besides fuel there is also an ignition system , is there spark ? There are some good videos on youtube on trouble shooting these systems , also on how to read a wiring diagram ! An you can view wiring diagrams for free at http://bbbind.com/free_tsb.html also check out video on basic electrical systems testing ! Remember, test don't guess !!!!!

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Have to look at a wiring diagram to figure that out

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95 astro has no spark to the coil what next


Try this tips:
1. Check the battery voltage at the battery with the digital volt/ohm meter. Set the meter to "Volts D/C" and touch the black meter lead to the negative battery post and the red meter lead to the positive post. A fully charged battery will measure 12.7 volts or more. A measurement of 12.5 volts is considered discharged, and the battery should be charged before any further testing. Any measurement below 11 volts indicates a severely discharged battery--the battery is most likely damaged and should be replaced. If the battery measures above 12.7 volts, proceed to the next step.

2. Check the starter for battery voltage by touching the red (positive) meter lead to the battery cable terminal on the back of the starter and the black (negative) lead to the chassis. The voltage reading should be approximately the same as the measurement at the battery. If the reading is lower than battery voltage, check for bad connections at the cables on the battery and the starter or ground cable.

Check for ignition switch signal at the purple wire on the back of the starter. When the key is turned to the "Start" position this wire should measure battery voltage. If the reading is less than battery voltage, or zero volts, check the fusible links (orange wires) on the back of the starter. If the fusible links are intact and not burned or broken, replace the ignition switch. If battery voltage is present at the purple wire, and the starter doesn't turn, replace the starter. If the voltage measurements at the starter are correct, and the starter cranks the engine over when the key is turned to the start position, proceed to the next step.

3. Remove the air duct attached to the throttle body, and spray a liberal amount of the carburetor spray into the throttle body. Replace the hose, and try to start the engine. If the engine starts, the fuel pump is not supplying fuel or the ignition module is not pulsing the injectors. Check the fuel pump fuse located in the under-hood fuse block. If it is good, check for power at the fuel pump electrical connector located near the rear of the fuel tank on the driver's side of the van. In the Chevy Astro van, power is supplied to the fuel pump by the the gray wire on the electrical connector when the engine is being cranked. If power is supplied, hitting the fuel tank with the flat side of a hammer while someone else is turning the ignition key to start will sometimes bump the fuel pump enough to allow it to start. If the fuel pump checks good, proceed to the next step.

4. Check for spark. Disconnect the coil wire at the ignition coil, and try to start the engine. If no spark occurs, replace the coil and ignition module. If a strong spark occurs, plug the wire back in, and remove a spark plug wire from a spark plug and repeat the test. If a spark is not present, replace the spark plug wires, and distributor cap and rotor.


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1996 f150 fuel pump


Hello;
You may have a break in the wire inside the tank to the fuel pump. I have seen the wires disconnect as the pump is installed.
Rich
RPM Northwest

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