- Joined
- Aug 4, 2021
- Messages
- 1,336
2001 Grand Prix SE with 3.1-liter motor.
After I started my Grand Prix when cold, and drove it about 30 miles, and came home, it started idling high, around 1500. After it started idling high it started shifting noticeably late. If I shut the engine off and immediately restart it, it started idling fine again temporarily. But I was sitting there in park, with a normal idle, but all at once, she would kick up to high Idle again. Almost felt like the older cars did, when say, you would turn the A/C on, or a high electrical load.
Engine had normal power and runs smooth and idles smooth.
It had/has no codes.
I had just changed the oil, thought maybe l bumped a vacuum hose off or something, but l drove it right after the oil change, and it idled and shifted normally that day.
IDK? Must'a took a fit yesterday? I opened the hood and did a good visual inspection, saw nothing amiss. Took it for at least a good 20-mile drive, everything is acting normal ATM.
After I started my Grand Prix when cold, and drove it about 30 miles, and came home, it started idling high, around 1500. After it started idling high it started shifting noticeably late. If I shut the engine off and immediately restart it, it started idling fine again temporarily. But I was sitting there in park, with a normal idle, but all at once, she would kick up to high Idle again. Almost felt like the older cars did, when say, you would turn the A/C on, or a high electrical load.
Engine had normal power and runs smooth and idles smooth.
It had/has no codes.
I had just changed the oil, thought maybe l bumped a vacuum hose off or something, but l drove it right after the oil change, and it idled and shifted normally that day.
IDK? Must'a took a fit yesterday? I opened the hood and did a good visual inspection, saw nothing amiss. Took it for at least a good 20-mile drive, everything is acting normal ATM.