Rough Idle
Thread Starter
|
Senior User
Joined: Sep 2001
Posts: 198
Likes: 0
From: Howard Lake USA
Rough Idle
My truck idles real rough, the idiling stays at about 1000 rpms. Once it warms up some times it will all of a sudden jump up between 2000 and 2500 rpms, then it will go back down and be fine, then all of a sudden it will jump back up.
It is a 1984 F150 4x4 300 L6, 4 speed manual.
It is a 1984 F150 4x4 300 L6, 4 speed manual.
Posting Guru
Joined: Jan 2000
Posts: 1,899
Likes: 1
From: Cullman Alabama
Rough Idle
Sumpin's wrong in your emissions tubing. Vacuam leak is a good guess.
One of the Thermal switches is opening/closing causing the High Idle solenoid to pull up and drop out.
Check all those hard plastic lines for Vacuam problems. Look at the Vacuam tree the front of the Rocker Cover.
One of the Thermal switches is opening/closing causing the High Idle solenoid to pull up and drop out.
Check all those hard plastic lines for Vacuam problems. Look at the Vacuam tree the front of the Rocker Cover.
