Nojoi|Antisaint

So, my car was sitting for four days, I go to pick it up and start driving. About three miles into the drive, the CEL starts blinking, then goes off. Then comes back on after accelleration. On, off, on, off on, then I pull into my tuner's shop and leave it. What's up with the CEL going on and off. I was under the impression that it would go on and stay on if there was coil damage? Anyone know about that? TIA.

ex-quattro PETE

sounds like your CP wasn't sure whether it wanted to go or not :-)

icos6

no it actualy blinks

Nojoi|Antisaint

Right on, it was blinking on and off. But it stopped and would come back on under any accelleration.

silver rain

sounds strange, when mine went it was a constant blink.

Hokie_Audi

A coil going bad will sometimes manifest as misfiring under heavy throttle with no CEL at all. Then it progresses to more severe misfires with flashing CEL, if you back the CEL will sometimes go away entirely, along with the misfires.

When a coil has totally gone you'll get a solid CEL on startup and a flashing CEL if you try and drive it.

I've had three coil failures so far... each one of them has presented this way, some moving to "totally bad" faster than others.

smovea4

should still have it replaced.

Nojoi|Antisaint

Thanks for the info.

skabaru

under full throttle it would flash, and as soon as the car dropped speed and RPMs dropped (IE I had JUST pulled over) the flahsing would stop and all would be ok... so I would nail the gas to get BACK into freeway morning traffic going 70mph, and it would flash again...

one thing to try would be to reseat each coilpack. just pull them up and push them back down again. That worked for me for a while, but it would still hiccup under full boost.

I eventually just bought a new CP at the VW dealer for $28 or whatever... the audi dealer wouldn't swap it unless it was DEAD DEAD... and I wasn't waiting for that...