I've got the strangest problem that my independent Subbie mechanic cannot fix.
The car has about 116,000 miles. It had been running like a top. About 3 weeks ago as I was exiting the freeway, the car had a hard downshift. As I drove down the off ramp it stalled. It restarted easily with somewhat of a rough idle. At this point the Check Engine light came on. OK
1. The OBDC indicated a bad TPS.
2. Replacing the TPS cleared the code but made no difference.
3. This engine has a MAP sensor but no MAF sensor. The MAP sensor seems to be fine.
4. If I start the engine in neutral with my foot on the brake on a slight hill, the engine will idle all day long. But, the absolute instant I take my foot off the brake, the engine stalls.
5. If I can get the car moving by giving it gas, the engine keeps running but there is a lot of shift shock. Most times stopping at a red light, the engine stalls.
6. Out on the freeway the car will run very smoothly at 65 mph. If I slow down to about 40 and put my foot into it, the trans will not downshift. However if I put the lever into 3, the trans does downshift.
7. At this point the Check Engine light is off and the scanner shows no codes.
8. Using the "magic sequence" and the trans oil temp light, the trans reports no problems with the trans.
9. My mechanic has replaced the TPS twice and even tried a brand new VIN matched ECU. No change. He traced all the wiring between the engine and ECU and trans and the ECU and found no issues.
10. He has conferred with a friend who is the top mechanic at the Subaru Dealer where the car was purchased. They have run out of ideas.
Help!!!!
Thanks, HeartMan
The car has about 116,000 miles. It had been running like a top. About 3 weeks ago as I was exiting the freeway, the car had a hard downshift. As I drove down the off ramp it stalled. It restarted easily with somewhat of a rough idle. At this point the Check Engine light came on. OK
1. The OBDC indicated a bad TPS.
2. Replacing the TPS cleared the code but made no difference.
3. This engine has a MAP sensor but no MAF sensor. The MAP sensor seems to be fine.
4. If I start the engine in neutral with my foot on the brake on a slight hill, the engine will idle all day long. But, the absolute instant I take my foot off the brake, the engine stalls.
5. If I can get the car moving by giving it gas, the engine keeps running but there is a lot of shift shock. Most times stopping at a red light, the engine stalls.
6. Out on the freeway the car will run very smoothly at 65 mph. If I slow down to about 40 and put my foot into it, the trans will not downshift. However if I put the lever into 3, the trans does downshift.
7. At this point the Check Engine light is off and the scanner shows no codes.
8. Using the "magic sequence" and the trans oil temp light, the trans reports no problems with the trans.
9. My mechanic has replaced the TPS twice and even tried a brand new VIN matched ECU. No change. He traced all the wiring between the engine and ECU and trans and the ECU and found no issues.
10. He has conferred with a friend who is the top mechanic at the Subaru Dealer where the car was purchased. They have run out of ideas.
Help!!!!
Thanks, HeartMan