View Full Version : cold start sputtering

09-30-2009, 04:18 PM
I got another problem now just seeing who can help. I start the car in the morning and it's starting to get cold so the tack goes to 12-1300 rpm and sputters a little while doing so. The SAI kicks on about 30 seconds later and is so loud and whines for about 20 seconds, this whole time the car is sputtering slightly. After about 2 minutes the car slows down slightly and goes to a normal rpm of about 800 and no more sputtering. My gauge reads 18 on vacuum. Car info is in garage and has a 2-3 month K04/Giac Hammer install.

09-30-2009, 04:50 PM
have you done anything new to the car lately, i had a similar problem but only because i used a seafoam treatment, which pretty much efd everything up, but let me ask you this is it a sputter or more like a knock

09-30-2009, 05:20 PM
Nothing different besides the K04 about 2-3 months ago nd it was fine. It's definatley like a sputter because as soon as the car warms up it gone.

09-30-2009, 05:45 PM
For starters, I'd check the coolant temp sensor reading, log the MAF, and check for boost/vacuum leaks.

09-30-2009, 05:49 PM
I upgraded the coolant temp sensor about 2 yrs ago, and this is the 3rd fucking maf I've gone through, it better not be the maf. I have logged the maf readings and I have a post somewhere on here with the readings. I checked and the maf readings seem to be normal. I have checked and checked for leaks and can't find any, but yes I think it's a leak somewhere too I just don't know where. Why does it only happen on cold start up and when warm it's good?

09-30-2009, 08:59 PM
I'm having the same issue and so is at least one other person currently.

Check this (http://www.audizine.com/forum/showthread.php?t=310724&highlight=annoying+cold+start)

As I mention in my last post. I'm thinking it might be something with the combi valve usually thought to be the EGR valve.

10-01-2009, 12:39 AM
ya sounds to me like a vacuum leak somewhere,