rough idle problem and can't find solution

1996 FORD RANGER
197,100 MILES
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Have you checked for vacuum leaks? Has the check engine light come on? Have you tried a fuel injector cleaner? Have you checked fuel pump pressure?

Let me know.

Joe
Mar 9, 2017 at 2:19 PM (Merged)
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AGLABANZAT
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I purchased an OBD2 3100e to check the engine codes. I replaced the fuel filter and received the following codes P0302, P0113, P0122, and P0511. I don't have the tools to check the fuel pressure.
Mar 9, 2017 at 2:19 PM (Merged)
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
It sounds like the engine is running rich. Have you checked the O2 sensors?
Mar 9, 2017 at 2:19 PM (Merged)