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View Full Version : Stop my "Cold Starts'?



biketsai
06-26-2009, 10:22 PM
So everytime I start my car, if I havent started it like 4-6 hours before, it will have a NASTY cold start at 1200rpm. It wasnt always like this, any way to end this? Or what causes this?

Answer: Turns out I just needed a new coolant temp sensor!

walky_talky20
06-26-2009, 10:47 PM
1200 rpm is not too high for a cold start, is it rough or misfiring when it starts cold? If so, it could be a failure of the coolant temp sensor - and the car not performing the cold start properly. It may not be adding enough extra fuel for the cold condition.

Nebone
06-27-2009, 06:46 AM
^I second that.

biketsai
06-27-2009, 09:37 PM
Doesnt misfire at all. But it just sounds SOO RASPY. Its nasty when I have to go to start it in the parking garage.

AudiRacerS4
06-28-2009, 12:08 AM
exhaust leak?

biketsai
06-28-2009, 12:10 AM
exhaust leak?

Nah, it goes away once the car comes back down to 800rpm. Ill make a video tomorrow or something.

MOtown A4
06-28-2009, 07:57 AM
i've been having the same thing happen to me. revs 1200 at idle on cold starts, then returns to 800 a little while after.

Bfiver
06-28-2009, 09:49 AM
not to thread jack but my 01 a4tq does a cold start when its freekin 90 degrees out ???? is this normal ?? I never thought about it until now lol

booost
06-28-2009, 10:49 AM
I have the same problem. Leaving work after 9 hours it's SOO loud in the parking garage it's embarrassing. I do however, have a hole in my flex pipe which has a clamp on it so I realize why it's loud, it gets much quieter when it drops to 800 rpm.

Note: My car always "cold starts" at ~1200 rpm if i haven't driven it in a while (usually 4+hours), this is normal though right? My old 2.8 did the same thing, as well as my gf's beetle.

big_greasy_taco
06-28-2009, 11:46 AM
not to thread jack but my 01 a4tq does a cold start when its freekin 90 degrees out ???? is this normal ?? I never thought about it until now lol

90 degrees isnt anywhere close to operating temperature. So yes that is perfectly normal. All vehicles should have cold starts built into the tune, and the car should not be driven until its warm. I honestly dont believe the cold start in production cars are sufficient. They shorten the coldstart I would guess because people are too impatient to wait. We have cold start programs on our Formula Car race motors, and its dumping more fuel in until about 70 degrees celsius (160 degrees) which is not even operating temperature, and that takes around 3 to 5 minutes depending on the outside temperature

BrokeDown[20V]
06-28-2009, 09:18 PM
Its just an 01 thing, as mine does the same. Its loud as hell when I have my dump open too.

k0mpresd
06-28-2009, 09:47 PM
its not just an 01 thing.

onemoremile
06-28-2009, 09:57 PM
Mine has always done that. So does the S4 and my old VR6.

maxspeed
06-28-2009, 10:07 PM
mines always done that...