hi my 96 wrx has recently started to missfire when cold from starting
like i say you start it ok as normal then it seems to rev low,on any throttle application it misses for a sec then all is fine,also all is ok at speed and when warm,just seems to miss when revving from idle
any ideas before i run it into the garage?

 

mine did this and was cured when i changed from tesco 99 to optimax.
it has done it on optimax once or twice. its to do with the amount of ethanol in the fuel i think. too much is bad for cold starts and tescos use more than optimax.

 

its running on v power as almost allways,never had any issues before?

 

anyone?

 

been told today it is possibly maf????does this sound right to peeps on here?

 

could be lots of things, you'll just have to write a list and go through them one by one

 

Could be the plugs needing changing. Mine does it due to running a GEMS ECU but if it gets worse I change the plugs which improves it decently.

 

if i was you i'd change the maf first, my old car messed about when cold and then i changed the maf and it was 100% better. may not be the same but worth a try first.

 

leading to my next question,how much is a green label maf?

 

about £40 off of here or ebay mate.

 

i have seen some at £250 so £30 is much better cheers