Running problem
 

Cars fine when cold but as it warms up it starts misfiring and when i stop it cuts out, when moving in a high gear with low revs you can hear it struggling and missing slightly

The cars an 03 STi with a 2.5 conversion


Thanks
James

dunno u checked fault codes

Its on a Simtek... so cant check for codes ;)

I'm not sure,but this is similar problem,which have before my friend with Simtek,but this has been related to anti-lag(which this friend have mapped and enabled all the time).

Coils or shagged plug Angus?

Think I have a set of 7's in the garage if you need them?

Steve

Pulley? Just seen Paulo P's thread about his car and makes me think maybe just maybe?

Steve

It's running too lean. Is the 2.5 conversion new, still running in? If so the Simtek will need remapping to suit, even for running in. Otherwise I would say it needs to be looked at by the mapper.

I know the engine has been run in fully for some time now (correct me wrong Angus mate) etc.

Why would the map go tits up if it was ECU related?

Steve

Does sound fuel related :) when cold it's getting more of the good stuff.

2.5 ?

that'll be head gasket failure then...

dunx

P.S. Coolant sensor failure ?

Not OEM 2.5 engine Dunx. Has been build partly by APi/Zen and TFS Racing I understand.

I'll get the tosser to log in quick to confirm. lol

Steve

Its a API built 2.5 that was rebuilt after it blew 2 pistons by TFS after SMG had checked the block was ok


I checked the airfilter and it looked ok, but after running out of ideas i went for a drive without a filter and it ran smooth without fault

Thanks for the replies :thumb: