FUEL ISSUES

  • Tiny
  • rmoore09
  • 1999 Ford Explorer
  • 206,400 miles

Hello, the engine is knocking like it has an octane problem. Also, it has a really rough start when starting cold as well. It will start up fine when warmed up. It seems to have no driving issues although it seems like its runs rough when taking off. There is no check engine light and the fuel filter has been replaced. The injectors have also been cleaned. Any ideas?

Saturday, July 14th, 2012 AT 6:23 AM

3 Answers

  • Tiny
  • rmoore09
  • Member

Also the MPG has not been affected.

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Saturday, July 14th, 2012 AT 6:24 AM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,840 posts

Take a fuel pressure measurement and post what you find.

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Saturday, July 14th, 2012 AT 1:11 PM
  • Tiny
  • djcl
  • Expert
  • 786 posts

A quick thing to try is to remove and maf sensor and clean the thin wire with cleaner

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Sunday, July 15th, 2012 AT 1:52 AM

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