I saw other threads with the same questions but I've also read you guys like people to start new threads.
If I'm waiting at a light the idle is quite rough, with about 300 rpm fluctuation. Runs fine at speed. Happens in Park or Drive, with or without AC. It has been gradually getting worse. The car has 100,000 KM (62,000 miles).
IIRC, the idle fluctualtion is the ECU trying to find the idle sweet spot. And AFAIK, all of the 2nd gen cars do it. It could be an engine mount going bad. How low is the RPM?
That should improve the efficiency of the motor, but I doubt it will help the idle issue. Basically the ECU is trying to lower the idle speed till it senses a stall. Then it jumps back up. Rince/repeat, causing the uneven idle.
...If I'm waiting at a light the idle is quite rough, with about 300 rpm fluctuation. Runs fine at speed. Happens in Park or Drive, with or without AC. It has been gradually getting worse. The car has 100,000 KM (62,000 miles)...
IIRC, the idle fluctualtion is the ECU trying to find the idle sweet spot. And AFAIK, all of the 2nd gen cars do it. It could be an engine mount going bad. How low is the RPM?
That should improve the efficiency of the motor, but I doubt it will help the idle issue. Basically the ECU is trying to lower the idle speed till it senses a stall. Then it jumps back up. Rince/repeat, causing the uneven idle.
I'm picking up some Mercon LV today, so tomorrow the tranny fluid and filter gets changed, the plugs get changed and re-gapped, ECU gets reset, MAF sensor gets cleaned. Will it help? Probably not but it will cost less than $200 before i give up and go to ford. At least the door locks dont seem to stick anymore.
My 1981 DeLorean runs smoother than my wifes focus. I do love the focus though. Very comfortable to drive, great on gas, looks nice inside. I drove (and still have) a 2000 Jeep Wrangler. Getting back into the Jeep feels archaic compared to the Focus.
Still haven't had time to service the car, however I've noticed the idle only gets touch when my foot is on the brake whilst in drive. if i put on the parking break and take my foot off the brake idle resumes a health 750 rpm.
The car has 100,000 Km on it and i bet these are original. We bought second hand but it goes to show you can't depend on PO's for good service history.
2. One of the spark plug wells was COMPLETELY full of oil. Is a new valve cover gasket kit required?
Thanks folks!
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Focus Fanatics Forum
5.8M posts
189.4K members
Since 2003
A forum community dedicated to Ford Focus owners and enthusiasts. Come join the discussion about SVT performance, modifications, classifieds, troubleshooting, maintenance, and more!