Fuel Issues

1999 FORD EXPLORER
206,400 MILES
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RMOORE09
  • MEMBER
  • 132 POSTS
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?
Jul 14, 2012 at 6:23 AM
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RMOORE09
  • MEMBER
  • 132 POSTS
Also the MPG has not been affected.
Jul 14, 2012 at 6:24 AM
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WRENCHTECH
  • CAR REPAIR CONTRIBUTOR
  • 20,761 POSTS
Take a fuel pressure measurement and post what you find.
Jul 14, 2012 at 1:11 PM
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DJCL
  • CAR REPAIR CONTRIBUTOR
  • 767 POSTS
a quick thing to try is to remove and maf sensor and clean the thin wire with cleaner
Jul 15, 2012 at 1:52 AM
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