Every morning when I come to start my car up it starts but runs on 3 cylinders, so as a process of elimination I take the leads off 1 by 1 to see which cylinder the mis-fire is on. Once ive found which one I clear the mis-fire by giving the throttle a few blips with the HT lead slightly off the plug. After this the car runs and starts fine and never misses a beat until I leave it over night and im back to square one. Ive taken plugs out to have a look and they are powdery black so its overfuelling and im booked in for a setup in 2 weeks so this will be resolved. Would the overfuelling problems have anything to do with morning startup issues??

Any help is much appreciated cheers

 

Yeh too much fuel in on cold start will flood all or one plug etc and miss, until the fuel burns off, which your doing blipping the throttle, We got one in the same at the moment! lol

When cold, its ber ber ber ber ber ber, rev then cleared! lol

Your set up should sort it

 

so its only doing it in the morning becuase its on cold start mode? would un-plugging the cold start valve help me out until I have it setup?

 

I never had my cold start connected. Quite a few people dont run them. The setup should sort this tho.

 

if its got black plugs then its over fueling on start up.

unplugging the cold start valve might help, have a go and report back fat lad


you decided where your taking it for a tune, bit far to bring it up here

 

LoL @ FAT LAD ive lost more weight il have you know.
anyway id bring it upto you if it was free and there was free digs lol then the petrol cost wouldnt be too bad as it would be the same as paying for a setup lol

 

is it same cylinder each time? Leaky injector

does it do the good old bang when you turn it off sometimes a few seconds after?

Havent you gone EFI yet!

 

Mine is the same when i start her up on these cold mornings, sounds like its running on 3 untill i keep the revs up for a bit! And my cold start isn't connected made no difference with it connected.

I just put it down to mfi being its usual self, and mine isn't overfuelling plugs are a nice normal brown colour.

 

no its always a different cylinder
and no i havent gone efi yet no funds!!!

you still got them poly bushes you want to donate to me

 

ive got the same thing this has helped me loads thanks lads...it was realy getting on my nerves.does it smoke a bit when its running on 3 cylinders?.and is your tickover a bit up and down?

 

tickover is fine once the misfire clears and it only ever happens first thing in the morning or if its been stood for longer than a day

 

when the van was mfi, it used to fire up on 3 then clear stright away after a few revs.

never got the the bottom of it, before i went gotec.

did you unplug the cold start valve today?

 

An MFi setup should not be used without the coldstart valve plugged in and working.

Your system will need to be setup and in tune for the cold start setup to work correctly.
Most people blame the injector for their engine being out of tune and disconnect it. You should have your engine setup to cure the problem not randomly disconnecting sensors or components etc.

There are many reasons why the engine would do this on start up.

But by disconnecting the cold start valve will not help you find the reason and easier.

Take it to a tuner and have it setup correctly or do some research and read a setup guide which i have put together for people like yourself.

Regards