89 Ford F150 4X4 starting problems


Old 07-23-05, 09:01 PM
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Question 89 Ford F150 4X4 starting problems

My truck has been sitting for a year. I have replaced low pressure pump in tank. It seems to be pumping fuel, but not reaching the chamber. It is an EFI 300 six cylinder. The engine turns over, but will not start. Do you have any suggestions?
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Old 07-24-05, 08:58 PM
Join Date: Dec 2001
Posts: 2,538
does it have spark?
also check to make sure the small ground wire at the negative cable is not broken as this will cause a no start condition.
if it has spark will it run for a second when starting fluid is sprayed down the intake?
if it does not run on starting fluid check for fouled plugs and check compression cylinders may have to be oiled to bring up compression if its been sitting for a year.
if it runs on starting fluid check fuel pressure at test port and check injector pulse at an injector using a noid light.
Old 07-12-06, 06:43 AM
Join Date: Jul 2006
Posts: 1

When the Truck is cold. Turn key on fuel pump will run constantly. Truck will not start. After turning it off and on 30 40 times truck will start. It runs Ruff for 5 mins then runs smooth and if you shut it off and turn back on, Fuel pump run for about 3 seconds and shuts off and truck will start. Fuel pressure 55 not running 50 when running holds 50psi in off position.
Dual Tank system rear Tank pump not working.
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