Question about 1989 Ford F 150

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We changed out...

The ignition module and still its seems like theres no fuel pressure

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You said you have no fuel pressure, so I assume the truck is fuel injected. I'm not sure why you thought changing the ignition module would restore the fuel pressure.
If you look in the engine compartment and find the diagnostic test connector you will find another connector close to it that should be marked "fuel pump or F.P.".It will be back by the firewall usually in the same area as various relays including the fuel pump relay
are located.
Connect a wire from that connector to ground and turn the ignition switch to run. If the pump is working you will hear the relay click and the pump running.
If you don't keep touching the wire to ground so you can at least locate the relay, then check to see if the fusible link for the fuel pump is burnt out.
If you find that the fusible link is ok but you don't hear the relay click then the relay is probably shot.
If your truck has recently been in an accident or someone bumped into it hard, the first thing to do is check to see if the inertia switch needs to be reset.

Posted on Jan 07, 2009

5 Suggested Answers

djicenova
  • 319 Answers

SOURCE: NO START

Check the wiring to the coil, it may have an intermittent short

Posted on Feb 27, 2009

  • 753 Answers

SOURCE: Chevy S-10 Start problems

If hall effect switch was bad you wouldn't get any spark.What year 2.5L is this?Is this a 2 injector Throttle Body? The pink wire on top of injectors comes thru a 20Amp fuse controlled by the Ignition switch you should have battery voltage with key on The dark green and dark blue wires come from the pcm which are called injector drivers the drivers supply a pulsating ground if you crank the engine with a test light between either pink/dk green or pink/dk blue test light should flash dimmlythat would mean injectors are being driven but there isn't any fuel at the injector or the injectors are bad no pulse means either a bad computer ( which these drivers are known for going bad)or the computer isn't being commanded to fire the injectors.

Posted on Aug 25, 2009

BCAS1298
  • 3092 Answers

SOURCE: I have a 93 Eagle Talon with good fuel pressure and no spark

WILL THE CRANKSHAFT SENSOR AND IGNITION MODULE COME WITH THE DISTRIBUTOR NEW OR REMFD, CHECK ALL FUSES, ALSO CHECK FOR INJECTOR PLUSATION WITH NOID LIGHT WHILE CRANKING ENGINE, IF O.K CHECK FOR VOLTAGE AT COIL PACKS THERE SHOULD BE TWO COIL PACKS, IF YOU HAVE VOLTAGE YOU COULD HAVE A DEFECTIVE DISTRIBUTOR

Posted on Nov 13, 2009

roniecon
  • 6826 Answers

SOURCE: 86 Astro Van - Increasing miss with speed

You may have some contaminated fuel,use a additive called heet,for moister,and lucas fuel treatment,these are premium additives,do not just use any brand,these I know will fix the problem if it is in the fuel.

Posted on Jan 25, 2010

roniecon
  • 6826 Answers

SOURCE: I have a 1988 Chev. 1500 Truck 350 motor. I have

Check the throttle position sensor with a ohm meter to see if it has a dead spot in it,and then there is the map sensor ,I think it is mounted on the passengers side valve cover,or the breather rectangle in shape and black in color,has one vacuum line going to it,and a three wire connector.Also check the fuel pressure regulator,it could be the problem,and make sure the return line to the fuel tank is clear,and not restricted.

Posted on Jun 04, 2010

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