98v70dad
Active Member
- Joined
- Oct 8, 2017
- Messages
- 325
- Reaction score
- 38
- Points
- 28
- Location
- GA
- Vehicle Year
- 1996
- Make / Model
- Ford
- Engine Size
- 3.0L
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
I've been trying to bring back a slightly neglected truck to good repair. The idle is a little erratic. So far I've replaced the cam shaft position sensor, synchro, epfe sensor and tubing, plug wires and plugs and cleaned the EGR and mass airflow sensor. I currently don't have any codes.
The rpms at idle sort of wander all over the place. When the engine is cold it idles at about 1000 rpm and then drops into the 900 range after a while. When its thoroughly warmed up the rpms vary from low 800's to just under 900. It varies 100 rpm within a few seconds. So I have a couple of questions.
1) what is the idle speed supposed to be?
2) I suspect that I have a vacuum leak - are there any typical leak spots to suspect first?
3) Is there some other sensor that may not be working right that I could clean or replace that will settle down my idle?
The rpms at idle sort of wander all over the place. When the engine is cold it idles at about 1000 rpm and then drops into the 900 range after a while. When its thoroughly warmed up the rpms vary from low 800's to just under 900. It varies 100 rpm within a few seconds. So I have a couple of questions.
1) what is the idle speed supposed to be?
2) I suspect that I have a vacuum leak - are there any typical leak spots to suspect first?
3) Is there some other sensor that may not be working right that I could clean or replace that will settle down my idle?