The Hits Just Keep Coming :(

[KrazyKong]

Some weeks back my heater core let go and drained into the cabin. Finally after getting everything back in the car after having to strip it, dry it out and find/install a new core, the car has now developed a spasm. I haven't driven it in a month due to taking my time with various things on the car from the heater core incident. After the initial freak out of discovering my car had little to no coolant in it, as it had leaked into the car, I filled it the next day and took it for a drive. It seemed to run fine. In the month it's been parked it hasn't leaked anything either. So hopefully that rules out any serious damage to the car.

But this spasm is very odd. That's really the best way I can describe it. It's like a hiccup, spasm or a twitch. The car used to run so smooth you'd never feel any kind of vibration. What happens is you feel this shudder in the car, then the revs drop, then climb back up. It seems to happen more when the car is warm. At first I thought it was simply air and bubbles left in the engine due to the heater core disaster. So I bled it out nicely today, and it's still doing it.

[R.3.2.G.T.R]

clean ur afm

[Rolls]

possible the coolant got into the loom or ecu?

[KrazyKong]

Will check the AFM but I only just looked at it recently when doing my FMIC install. Can't imagine it got clogged up while not being driven.

The ecu looks fine. The coolant leaked out in direction which wasn't close to the ecu. It left a white residue mark on the rubber firewall covering. The loom is up high under the dash I believe. The coolant was absorbed by the thick underlay mostly, so there really wasn't a whole lot of free standing coolant anywhere.

[KrazyKong]

Just got back from a dyno place and from the sound of things, it's looking like the coilpacks might be stuffed.

Things to note is the shudder and spasm happens when in "D" (I have an auto) more than in Park or Neutral. Happens alot more when the car is warm/hot too.

Maybe the coils got cooked when the engine was low to nearly having no coolant in it when the heater core crapped itself.

Does this sound more like my problem at all?

[Rolls]

stock coilpacks always shit them selves, replace them either way

[KrazyKong]

For sure Rolls. However money is extremely tight for me right now. So I want to find out 110% it's the coil packs before replacing them, as in all honesty the stock ones up to recently were performing just fine. I don't need super duper 800hp ones, just ones that work - and most importantly not buying new ones when the problem isn't the coil packs.