Touareg: 2004 V8
Join Date: Mar 2010
Location: South Carolina
Second Vehicle: Still looking
Thanked 0 Times in 0 Posts
Not Limp Mode, but car stalls at high speeds
When I drive for a long trip (like 2-4 hours) my car has started to stall at 80MPH. It usually happens after 2-3 hours driving, then reoccurs every 10 - 20 minutes. I have changed out my gas pumps and filters, bought a rebuilt alternator from O'Reilly's Auto (installed myself), and replaced the old wire from the Alt to the power terminal under the hood. I have also changed out the temp sensors (2 yrs ago) and the timing/waterpump.
What worries me is that I still don't get 14V on the dash (13V to 13.5V), but show 14V (according to Advance Auto) on the terminal.
The odd part is that nothing really happens other than the car just stops pulling. There's power in the car everywhere (radio, dash, etc) and I don't get an error on the VCDS. I just feel a drop out in power and no gas on the pedal. I roll to the side, stop and restart the car. Then I can drive for another 10-20 miles.
So it seems like an over-heating issue since it happens only at high speeds and on long runs. I actually stopped it from occurring more frequently when I wrapped the wires in the headlights that were showing (may need to check again). Obviously, there's no overheating on the dash and when I drop down below 80MPH I can "usually" stop it from occurring.
Any thoughts on what this could be? I searched power drops and other terms and nothing seems to match. Also, I had the problem before I got the alternator and replacing it fixed the problem for 4 months. Now its back again and I'm frustrated.
Sarcasm...Forget it, it's new.