Backfire/transmission not shifting properly

200,000 MILES • 5.9L • V8 • 4WD • AUTOMATIC
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TERRY.MULLEN
  • MEMBER
  • 1 POST
Drives fine. Shifts from first to second then when you would expect it to shift to third it starts to backfire and miss. Back off the throttle a bit and it will shift to third and then it is fine.
Jun 10, 2018 at 10:02 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,540 POSTS
This is a classic misfire problem. I would do a full tune up with plug wires. Use all OEM spark plugs and wires. Here is a guide to help you:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Please run down this guide and report back.

Cheers, Ken
Jun 12, 2018 at 3:42 AM
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