no, will not effect the ac system

temp should be outside temp. it needs a 8 hour off time. then it has to heat up to normal operating temp, be in overdrive or high gear and the fuel tank between 15 and 85 percent. you cannot turn off the motor either while setting. the car needs to be at 55mph, high gear, temp up and fuel tank at proper level.

Roy

Answered by ASEMaster6371 (expert)
24,973 answers provided

Thanks, I'll give that a shot. The parameters I have are slightly different:

- fuel 1/4 to 3/4
- pre-startup ECT < 2*C (cold start)
- ECT warmup to at least 70*C before moving
- drive around for at least 20 mins before test
- a few more little things that don't matter

Then the test initiation goes like:

1. Start & warmup engine
2. After 20 min driving, accelerate to 30-50mph and maintain for 3 min.
3. Decel to 0mph and hold brake for 1 min while in drive (auto trans)
4. Accel to 40-45mph for 1 min.

So far no luck but I'll try the 55mph speed you suggested after my engine cools down again.

Response from rublej
1 question asked

now that motor is hot, it will not run. it has to have the 8 hour soak. tomorrow is another day

Roy

Answered by ASEMaster6371 (expert)
24,973 answers provided