I had a search through the threads last night and it sounds exactly like this except mine shudders and ****ters when i put my fot down
"HELP !- losing a cylinder in the rain
As topic states:
losing cylinder(s) when parked outside in the current Sydney weather for 6 hours on an otherwise stock ECR33. after a while (quite a while) & some heat it comes good. The plugs are newish and the Datto has never missed a beat.
Are S1 RB25's prone to this ??
has anyone else experienced this ??
It's kinda spooked me... "
Yup, adam's spot on. it'll sound like a WRX just off idle & runs about as bad as an engine can without stalling !
Swapping the pos of the coils on the alloy mount... well I'm dead certain the moisture was between the coil & mount and that by simply removing/inspecting/cleaning/silicone spraying/replacing (with sighted good ones) the known faulty ones came good !!
Also I eyeballed the sus coils arcing (up to 12mm !!) to the alloy mount from their bases which was a bit of a giveaway.
I reckon seeing is believing, & there's been a lot of threads about coil pack testing involving swapping coils and tossing the failing ones. So how many perfectly good ones get tossed !!
Using the "Crank & Eyeball" test, if the coil is good you should see a spark, but NOT necessarily at the plug electrode !
If no spark do the GraemeW test. Many have questioned the validity of this test, but if it fails it's well & truly dead. I know from searching these forums that other members coils' have passed the resistance test but got binned anyway, consequently the rumour exists that this test is unreliable - methinks not !!
P.S. I gapped the plugs to .75mm and no more miss under load @4500rpm above 8-9 PSI with stock ECU. Jay95 posted about this in another thread & I give it the full thumbs up.. gap 'em down with confidence.
so do you think it could be the coil packs?