Author Topic: over fuelling  (Read 3436 times)

Offline supercharged spaniel

  • Members
  • *****
  • Posts: 1034
  • GRRRRRRR
over fuelling
« on: May 09, 2008, 10:50:51 am »
what would make a G40 overfuel on start up?  blue temp is new...any other ideas?  just trying to get my head round something.

Offline PeteG40

  • Administrators
  • *****
  • Posts: 4028
  • Housewives heart throb
Re: over fuelling
« Reply #1 on: May 09, 2008, 12:34:11 pm »
nasty chip - ecu fault?

Offline hayesey

  • Administrators
  • *****
  • Posts: 5776
  • The CV joint killer
    • ClubG40
Re: Re: over fuelling
« Reply #2 on: May 09, 2008, 12:34:15 pm »
what do you mean on start up?  How long does it overfuel for?  What makes you think it is overfuelling anyway?  There are a million and one reasons really, starting with basically any of the engine sensors or damaged wires in the loom, although they normally cause problems all the time.

Offline supercharged spaniel

  • Members
  • *****
  • Posts: 1034
  • GRRRRRRR
Re: Re: Re: over fuelling
« Reply #3 on: May 09, 2008, 12:54:23 pm »
[quote pid=1251 author=hayesey date=1210332855]what do you mean on start up?  How long does it overfuel for?  What makes you think it is overfuelling anyway?  There are a million and one reasons really, starting with basically any of the engine sensors or damaged wires in the loom, although they normally cause problems all the time.[/quote]

mmm well ive tried a different ecu.  it just smells very petrol like on intiial start up and i think thats whats causing my problems on start up with the miss fire. I do have a slight blow in the back box but im gonna get a new one this week so that would make it smell a bit i'd have thought but it wouldnt make it do owt else.

 it takes a second or so to start missing so its like an electrical fault, like the ecu is getting a bad reading and adjusting wrong..  im starting to think i may have a damaged wire  but im not too sure, just thought i would ask this to get thinking about it again.  i tried another fuel pressure regulator too..that made no difference.  would a damaged or old CO pot cause grief?  its set right but its the only sensor i havent changed.

the car will often stall if started cold and left standing.  as the idle eventually drops it'll then drop off and stall.  doesnt do this at all after a few mins driving.

Offline supercharged spaniel

  • Members
  • *****
  • Posts: 1034
  • GRRRRRRR
Re: Re: Re: Re: over fuelling
« Reply #4 on: May 09, 2008, 12:55:30 pm »
i also put a new fuel filter on but again no difference.the car drives totally problem free when its warmed up..not even fully just after a few mins driving.
« Last Edit: May 09, 2008, 12:57:08 pm by supercharged spaniel »

Offline PeteG40

  • Administrators
  • *****
  • Posts: 4028
  • Housewives heart throb
Re: Re: Re: Re: Re: over fuelling
« Reply #5 on: May 09, 2008, 12:57:55 pm »
I thought you said your valve seats might be worn - heat causing this to be less of a problem as it warms? I dunno - i've never messed with a head.