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Running rich and jerks on and off the throttle

Discussion in 'A3/S3 Forum (8L Chassis)' started by Mattfaced, Feb 16, 2010.

  1. Mattfaced
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    Mattfaced Member

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    Dont think its maf related, would the fuel pressure regulator on my fuel rail cause this?
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  2. tankie2ndrtr
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    tankie2ndrtr Member

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    Are the symptoms only when the engine is cold ?...
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  3. Mattfaced
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    Mattfaced Member

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    Yeah i seems to be much worse when cold, not the maf just had a new one
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  4. tankie2ndrtr
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    tankie2ndrtr Member

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    Could be a coil or wiring loom. If your only idling or crawling along the revs will be lower and the misfire will be more prominent... VAGCOM is prolly the best way to start fault finding, see if its a spark/coil problem rather than a fuel delivery problem...
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  5. Welly
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    Welly VX220 SC Driver :)

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    Sounds like symptoms of too much fuel pressure I must admit. What is the FPR - 3 BAR or 4 BAR? What engine is it?
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  6. Mattfaced
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    Mattfaced Member

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    Just an stadard agu, apart from the remap, symtoms seem to have developed since the remap
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