Runs rough

Tiny
ED W.
  • MEMBER
  • CHEVROLET
1989 s-10 pickup with 2.5ltr 4cyl TBI single injector.

Have replace plugs, fuel filter and air filter. Checked all vacuum hoses and fittings. Good vacuum to Map sensor.
Smell fuel when shutting off. Still runs rough idle through high rpm. No codes coming from computer.

Please help.

Many thanks,

Ed
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Thursday, December 28th, 2006 AT 8:32 PM

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Tiny
KENVCR
  • MEMBER
Fuel pressure regulator. Replace it.
I have dealt a lot lately with this same issue for a lot of people.
Use a good quality gas (min 87 octane).
When you take off the old one be very carefull to remove 100% of the old gasket. Be sure that any pieces that fall into the plenum area are picked out or you will encounter new problems soon.
Good luck.
Kenvcr
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Sunday, December 31st, 2006 AT 1:04 PM

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