Weird but not huge problem during startup
 

hey all, when I start my car up in the bone cold(10-20 degrees) it will start up fine, but idle rough backfiring quite alot. Then after its warming up for a min, it will like kick in kinda, the intakes and air pump make a weird noise, it sounds like a sudden rush of air is sucked in, and my idle smooths out,and the backfiring dissapears.


Is it my air pump not engaging right away causing overly rich idleing?

Its not a big problem or anything, and it only happens when I start it very cold.

Steve

booga booga

My car does kinda the same thing, only when it's 10'ish out... Fires up fine, but after idling a min the idle drops a tad and I do hear a sound like air rushing in but I get some oil smoke at that time but clears up after about 20-30 seconds and smooths out.

its the car telling you toi move somewhere warm.

lol thanks.

Mine just kicks in, the idle doesnt drop, it goes up like 200 rpms and the backfiring smooths out alot..

I dunno it will probably go away when its warmer.

It's funny you mention this today since it being 20 degrees here in NY. I had the same thing.It was fine starting up and when i got ready to drive, the car kind of stuttered and even though I was accelerating, the car kind of bucked, and dropped rpm's (even though i'm on the gas). I don't know if it's the double throttle / butterfly that says the car isn't warmed up yet, so it's not opening fully. - This is just a guess. Anyone know if this is a true assumption ?
This has happened a few times before when it was this cold. In nice 40+ weather this never happens.