davidgoodwin1803

hi guys my car is running really lumpy when its cold, mis firing and holding back, kangarooing up the road.

as soon as the car is warm it all stops.

i should add that the fans do not come on when i first start the car
(coolant temp sensor) and there is no cell light.

Thanks David

swisstonihasher

Its probably the engine temp sensor(s) for the ecu, these tell the ecu if the engine is cold and then ecu adds fuel to match and control running - I'm no expert though but know fuel injection cars are/can be like this.

Fans shouldn't be running from cold, only kick in when hot.

davidgoodwin1803

the reason i said about the fans it that it is a sign of the temp sensor failing when you start the car and the fans come on.

as i dont have this problem could it still be the temp sensor

myblackwrx

iTrader: (1)

Yes a few weeks after i got my impreza it had similar symptoms and the CEL wasn't lit ,changed it and it cured the problem.

davidgoodwin1803

thanks paul i will get one from triton next wekk.

Thanks david

StickyMicky

did mine a few weeks back, helped mine loads when it was cold

myblackwrx

iTrader: (1)

Only costs about £25ish fairly easy to change as well (which makes a change )

davidgoodwin1803

thanks again paul.

David

davidgoodwin1803

changed the temp sensor and all working fine now.

harrisonl84

im having a simular problem... is it easy to change a temp sensor?

harrisonl84

also does not like starting when cold in the morning sometimes have to use the throttle to get it to start?? any ideas