5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Misfiring under accelerator

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Old 10-05-2007, 01:09 AM
  #1  
redemption
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Default Misfiring under accelerator

car is still missing so far ive done , new wires new plugs, new tps, new cap and rotor,check vacuum leaks and hoses, fuel pressue is 40, BUT something new i found my check engine light will flash on at high rpms and then go off as i come down the rpms so any solutions?
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Old 10-05-2007, 06:46 AM
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mjr46
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Default RE: Misfiring under accelerator

you need to run a koer/koeo test to see what the computer is picking up on.....could be a problem with the mass air meter if it's a mass air equiped vehicle and not speed density
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Old 10-05-2007, 08:04 AM
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50foshow
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Default RE: Misfiring under accelerator

my buddies 90gtwas mssing real bad in the higer rpm's he just put in a new msdcoil and it was fixed soo swap in a coil its worth a shot pretty easy thing to fix
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Old 10-05-2007, 08:28 AM
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FivePointOhh
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Default RE: Misfiring under accelerator

dont just go slapping on new parts. find your problem, fix it, then start upgrading.
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Old 10-05-2007, 12:46 PM
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redemption
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Default RE: Misfiring under accelerator

i ran codes and it says for koeo 85 and for koer 11 system ok
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Old 10-05-2007, 01:27 PM
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Default RE: Misfiring under accelerator

anyone else?
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Old 10-05-2007, 01:41 PM
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FivePointOhh
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Default RE: Misfiring under accelerator

volt meter to the coil and from the coil. what is it reading at? that will single that part out.
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Old 10-05-2007, 02:05 PM
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redemption
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Default RE: Misfiring under accelerator

theres no lip on the snout so it might not be getting a good connection
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Old 10-05-2007, 05:24 PM
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Default RE: Misfiring under accelerator

/bump is it possbile my clutch isnt in egaging all the way ?
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Old 10-05-2007, 06:14 PM
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Default RE: Misfiring under accelerator

no its not a clutch issue... check out your tfi
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