: Rough Start in the morning

09-12-06, 09:23 AM
Every once in a while my 99 Catera will start very rough in the morning. Is this a common problem? It seems to be fine after the initial start.

Also, I often have problems accelerating right after I start the car. Would this have any connection to the rough start?

As I said before, everything seems to be fine after the initial start.

Thanks for your help

09-12-06, 01:04 PM
search the archives for "rough start" or "lumpy idle" or something like that.

are you getting any CE codes?

i had that condition and a new MAF sensor cleared it up, as it has for many others.


09-13-06, 02:18 PM
well also you might want to check spark plugs, fuel filter, but more then likely it is your mass air flow sensor but never hurts to check out the small stuff too to keep the car running nice. one way to check if it the MAF sensor is to unplug it then start the car and see if the bad idle is gone if so then you found the problem.

09-15-06, 07:46 PM
i would have to say no to the MAF sensor, i just replaced mine like 3 weeks ago and since we are having a cold weather spell, my car has gone back to the rough idle when starting cold. My car runs perfect except for this problem, so i wouldnt worry too much.