Car has been fine, last night we wired up the ApexiSAFC and found that there is a dodgy earth pin on the ECU (not the main earth but the one the SAFC goes to). We are gonna redo the connection on sunday - and everything works fine in the car.

 

Im driving down to plymouth today in HEAVY rain, and when i give it 100% throttle it gets to about 5000 rpm and starts misfiring, in every gear. I slowed down and gave it about 50 percent throttle and it went right up to 7000rpm no problems.

 

It might just be a coincidence with the fact we fiddled with the ECU last night, or it might be damp somewhere, but i wondered if anyone else ever had this problem ?

 

Also, im running twin turbo Iridium plugs in the car, which im going to inspect in a few hours (when its cooled down a bit) - dont know if this would cause a problem ?

 

It was fine a full chat till i hit the motorway, then i started really badly misfiring at full throttle - which makes me think WET - but surely on coil packs this shouldnt be a problem ??

 

Any help would be greatly appreciated - Mike

 

PS. Its an NA

Just been informed this could be water getting sucked through the AFM as it was so wet ! Sounds good to me

yeah i think "water on the cone" is the most common cause of misfire at high rpm. the air filter is far too vulnerable where it is. :(