misfiring and fowled plugs

FORD MUSTANG
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VIKINGDADDY1
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  • 3 POSTS
Hello I have an 1988 mustang GT 5.0.... It runs great BUT I am having trouble getting it to idle. It idles high then low then high and then tries to die . You can also hear it misfiring and the plugs get fowled up after a while Any thoughts on what could be wrong. Would an EGR or O2 sensor do this?
Apr 9, 2007 at 11:49 AM
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VIKINGDADDY1
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  • 3 POSTS
Anyone? No one...Please help
Apr 11, 2007 at 12:22 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Last major tune-up? could be the idle speed control/throttle body coked-up/throttle position and MAP/BARO sensor.

Or fuel pressure problem
Apr 11, 2007 at 12:35 AM
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VIKINGDADDY1
  • MEMBER
  • 3 POSTS
Just did a tune up 3 weeks ago. And I tested the fuel pressure at the fuel filter it was 80
Apr 11, 2007 at 5:40 AM
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