YoureATowel |
10-02-2020 02:54 PM |
Like Bravo99 said, you may need to check your vacuum lines. A good way to do this is to spray little spurts of brake cleaner in areas to see if the engine revs up a little bit. Sometimes this doesn't work but usually it does. If it doesn't do anything a vacuum line could be collapsed in on itself. To check that I would just gentle squeeze the vacuum lines to see if they are soft (can be done with or without engine running). If you know anyone with a good scan tool that can read data values, then I would look into the TPS (Throttle Position Sensor) and the IAC Valve (Idle Air Control Valve). These two items can cause a rough or high idle without setting any codes.
If the engine returns to normal operating speeds and doesn't have an issue with the idle while in park or neutral, I would also look into the transmission pressures and torque converter lock up values. If the torque converter is starting to go bad it will cause a rough idle in gear and when it goes bad, the engine will stall when put into gear. If the idle is rough or high in any gear I would highly doubt the torque converter is your issue.
|