If you run a log and capture your MAF readings when hitting redline in third gear you should see a minimum of 950.

I'd leave it alone for now, but keep in mind that you can still drop it a little if desired (lowering usually gives you more fueling- lower it too much though and you'll get deceleration stumble). Good, making progress here! That IQ was clearly wrong.

It did drive better today since I changed the IQ back to default. I did run it to redline and the highest number it went to was 490. Not sure but it seems to be matching what is specified? In measuring blocks group 10 Air System & Charge Pressure Control, the MAF (Actual) read the same 435 and then dropped to 270 which is within range. In adaptation under channel 03 EGR, MAF (Specified) called for 280 mg/str and (Actual) was 435 mg/str So I looked at all the data again on VCDS when I got home while the car was still at operating temp. I had to go back and look at my previous post from January when it would hard start while cold and the timing was retarded. Must have had a brain fart and typed that. My timing was never 'way advanced' as I typed earlier. This seems closer to the 3-ish you were suggesting. I went ahead and set the value back to default 32768 and the IQ dropped to 3.6 mg/str. Yes, 32768 is the default value (IQ, not EGR)- I'd leave it set at that and hammer mod until you drop your IQ to around 3.0.Ĭlick to expand.I am not modded, for some reason it was not set at the default value of 3275 which put me at 6.4 Dropping from 6.4 to 3.0-ish is too great of a leap to do with VCDS. Why are you set at 6.4? Are you modded? If not, then a more 'natural' number is around 3.0 to 5.0 (3-ish tends to be closer to what folks find work). There are other things that can be checked if the MAF gets ruled out, but now's not the time to be leaping ahead of things. Was the discovery of the timing being 'way advanced' before or after the shop did the TB? I have found that advanced timing generally tends to help with cold starting.

No, belt stretch doesn't come into play to any real measurable degree: the TB tensioner will take it up movement of your cam or IP gear, however, affect timing, and if those are properly tightened then the only real way for the belt to introduce timing differences is if it were to toss off a few teeth, which equals 'BAD' (TB event). Timing set midway to upper line should be fine. Yes, 32768 is the default value (IQ, not EGR)- I'd leave it set at that and hammer mod until you drop your IQ to around 3.0. Click to expand.Why are you set at 6.4? Are you modded? If not, then a more 'natural' number is around 3.0 to 5.0 (3-ish tends to be closer to what folks find work).

Vcds measuring blocks list maf