1988 ford f250 won't start
#1
#7
First put a fuel pressure tester on the fuel rail, see how much if any fuel pressure you have.
See if it falls within spec,
Engine off - 35 to 45 psi.
Engine running,
Fuel pressure reg vac line on - 30 to 45 psi.
Fuel pressure reg vac line off - 5 to 10 psi increase.
Volume test - low pressure pump - 6oz in 5 seconds.
Static pressure leakage check - remove power, verify that the fuel pressure remains within 5 psi of spec for 1 minute.
That should get you started, find an issue with any of the above let us know and can go from there.
Does the truck have spark?
See if it falls within spec,
Engine off - 35 to 45 psi.
Engine running,
Fuel pressure reg vac line on - 30 to 45 psi.
Fuel pressure reg vac line off - 5 to 10 psi increase.
Volume test - low pressure pump - 6oz in 5 seconds.
Static pressure leakage check - remove power, verify that the fuel pressure remains within 5 psi of spec for 1 minute.
That should get you started, find an issue with any of the above let us know and can go from there.
Does the truck have spark?
Trending Topics
#8
Do all the tests that Danr said first. I just bypassed mine because I only have 1 tank. I took mine apart and found a rubber o ring half out of place on mine. If youre going to pull the selector valve you're better off installing a new one as these do have problems and do go bad. But start with replacing the cheaper things first like fuel pressure regulator and fuel filter if your fuel pressure is out of spec.
#11
Well the Ignition Coil, PIP – Profile Ignition Pickup and TFI – Thick Film Ignition module would all be suspect.
Your TFI module, it mounted on the dizzy? if so that be higher/highest on the list first best "guess".
Couple quick tests, verify power to the coil, should have battery voltage to it key in start and run positions.
Remove spout jumper and test for spark.
Your TFI module, it mounted on the dizzy? if so that be higher/highest on the list first best "guess".
Couple quick tests, verify power to the coil, should have battery voltage to it key in start and run positions.
Remove spout jumper and test for spark.
#13
See> Ford Ranger/Bronco II TFI Ignition Diagnostics
Yea yea yea I know, its for a ranger/bronco 2, came up in a quick search for a link with a diagram showing location and basic diagnostics procedures, its the same for yours.
Yea yea yea I know, its for a ranger/bronco 2, came up in a quick search for a link with a diagram showing location and basic diagnostics procedures, its the same for yours.
Thread
Thread Starter
Forum
Replies
Last Post
eaglesface123
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
05-02-2016 11:25 AM
79f-250custom
1994.5 - 1997 7.3L Power Stroke Diesel
7
08-16-2011 06:16 PM