PCM swap

1998 FORD F-150
377,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
No it does not. It could be wiring, the solenoid or a valve body issue.

Roy
Sep 4, 2020 at 3:46 AM
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JAMESBURROW
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  • 46 POSTS
When the engine is cool it will shift into 1st 2nd and 3 but when it warms up it will only shift into 1st and 2nd.
Sep 4, 2020 at 9:11 AM
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JAMESBURROW
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  • 46 POSTS
And sometimes it will jerk when it's in 2nd.
Sep 4, 2020 at 9:12 AM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Okay, we are off track here. Your original issue was with the PCM and engine.

We are off on the transmission and that will require you to start a new post as we can only deal with one issue at a time per question.

On the engine issue, what did you do about the low compression?

Roy
Sep 4, 2020 at 9:17 AM