Misfire and running rough

2002 FORD RANGER
110,000 MILES • 3.0L • 6 CYL • 4WD • AUTOMATIC
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SHELBEL9
  • MEMBER
  • 1 POST
Started it one day all the sudden it was misfiring, check engine light came on, horrible fuel consumption, no pick up. Changed plugs, wires, fuel filter, coil, injectors, throttle position sensor, cleaned MAF sensor, check fuel pressure, checked catalytic converter. The check engine light on, threw a po174 sensor in bank 2. Would barely go up a hill. After doing throttle position sensor it had a lot more power and pick up but still missing. What else could be checked? I am out of ideas.
Mar 26, 2018 at 12:52 AM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good evening.

I would start with a compression test to verify the internals of the engine are in good working condition. if you still have a misfire. that cylinder is suspect.

Roy
Mar 26, 2018 at 3:12 PM
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RENEE L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 1,260 POSTS
Hello SHELBEL9,

If you decide to conduct the compression test yourself here is a link to an article from our site with written step by step instructions, pictures and video to guide you:

https://www.2carpros.com/articles/how-to-test-engine-compression

If you have any questions or need further advice please reply to this post and one of experts will be happy to help you.

Thank you for visting 2CarPros and have great rest of your day!

Renee
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Mar 27, 2018 at 4:46 PM