Will not start?

1990 FORD F-150
85,789 MILES • 6 CYL • 2WD • AUTOMATIC
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TMF94
  • MEMBER
  • 1 POST
Went to leave work an hour ago and my truck won't fire. The battery is good spark plugs and wires are good, fuel pump is coming on. What could be the problem?
Feb 10, 2023 at 7:23 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

If the starter is engaging, chances are you either lost fuel pressure or ignition spark. Here is what I need you to do.

First, see if it will start using starting fluid. If it starts and then stalls, we know it is a fuel-related issue. If there is no change, I need you to check for spark at the plugs.

Here is a link showing how that is done:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Try this and let me know what you find. Also, here is a link that explains how to retrieve diagnostic trouble codes. This truck has an OBD1 system that doesn't require a scan tool. Follow the directions in this link and let me know if you get any codes:

https://www.2carpros.com/articles/ford-lincoln-mercury-obd1-1995-and-earlier-diagnostic-trouble-code-definition-and-retrieval

Let me know.

Joe
Feb 10, 2023 at 1:45 PM
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