Start-Up Issue
 

Ok, I have had a rough idle at start-up for the past 6-8 months.

I have done the following, it has helped, but it has not gone away yet:
-Fuel filter
-CCV (cold weather kit)
-Vanos seals, valve cover, cleaned ICV, cleanded MAF

Here is the current symptom:
At cold starts, I turn the key. The engine takes a bit longer to turn on, once on, it immediately goes into a rough 300-500 rpm idle. The second I tap the gas, the engine fixes itself and idles smoothly for the rest of the ride.

No fault codes on the PEAKE tool...

I have 88K on the car.

Anyone else have this issue, and if so, how did you fix it?

Bad ECU flash? Clogged catalyst? I'm just throwing that out there.

Give this a try: Turn the key to on and wait 3 to 5 seconds. Then start the car. Please let me know if this helps.

^ that wouoldn't eplain the rough idle, but my car doesn't want to fire up until the check light has gone out...

It might be soemthing like a leaking injector or possibly a valve seal i.e. fluid is leaking into the cylinder which takes a blip of the throttle to clear.

Rich

I will try the key thing today and let you know.

As far as something leaking into the cylinder, I have eliminated that as a possibility. If I turn the car on, and it goes into a rough idle, it will continue until i tap the gas. I have let it go in rough idle for as long as 30 second, after that i cringe and can not take it any longer.

I should also mention it does not happen all the time, but at least 3 times a week.

I will see how i can check the ECU flash and catalyst.

Could it have anything to do with the MAF sensor? I have cleaned it, but maybe it is going bad and a little jolt of air, from pushing down the gas puts it back in check? I have already taking apart and inspected the intake lines, clean with no cracks.

Does anyone now how to check a MAF sensor? Can it be done with a simple volt meter?

Richy Boy was right.... http://forum.e46fanatics.com/showthr...600&highlight=