help
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New User
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help
94, 302 ext cab when it starts it does so fine will occasionally run and drive perfect stop and turn engine off and will spin forever no fire. sometimes will just out of the blue while driving lose power and not fire back up ,like mon morn on way to work ,left truck came back 8 hrs later fired a went 20 miles bam lost power in driveway . today changed ignition module truck starts like a champ let idle in driveway rev it several times to 3500 or so turn off come inside to eat return 30 min later and will do nuthin but spin over please help before the old dawg gets sent to pasture
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
When you say "no fire" do you mean won't start or has no spark as in you checked it already?
If won't start test for spark during the no start condition, if good spark is present test the fuel pressure at the rail during the no start condition.
One or the other is intermittent causing the problem, narrow down which one is lacking during the no start condition.
Could be as simple as a faulty coil, could be a dieing fuel pump. But start with the basics first find out if its spark or fuel related then go from there.
If won't start test for spark during the no start condition, if good spark is present test the fuel pressure at the rail during the no start condition.
One or the other is intermittent causing the problem, narrow down which one is lacking during the no start condition.
Could be as simple as a faulty coil, could be a dieing fuel pump. But start with the basics first find out if its spark or fuel related then go from there.
Thread Starter
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New User
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sorry , had no spark at plugs or coil wire mon roadside replaced coil 2 weeks ago wires are in decent shape plugs also popped cap off today and looks okay ,pump seems to prime when switch is turned on audible to the ear anyway have not hooked to a gauge yet ,thanks
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 12
From: Sand Lake, MI
Then I'd suspect the coil first, gets hot and quits working. Or even just a bad 12v+ battery connection to it, intermittent. Make sure the red wire at the coil is clean and tight.
If all that tests out in good working order then I'd start looking to the PIP sensor in the distributor as the possible cause of the problem.
http://www.fordfuelinjection.com/?p=25
If all that tests out in good working order then I'd start looking to the PIP sensor in the distributor as the possible cause of the problem.
http://www.fordfuelinjection.com/?p=25
