For a couple of months now my 01 Ford Focus has had a very rough idle coming from a cold start, sometimes it has a hard time turning over to turn the car on. After about 10 to 20 minutes of driving in the city or on the freeway the sound seems to get better at idle. Also the engine sounds a little rough coming from a stop and accelerating but seems to dissipate when driving at a constant speed.
Rough Idle from a cold start on 2001 Ford Focus
by wallst1 in Pleasanton, CA on October 18, 2011
ANSWER by mastertech6371 , October 18, 2011
i would get the injectors cleaned. they may be your issue. if it was plugs, it would do it all the time. Roy
ANSWER by Hal... , October 19, 2011
You didn't mention the mileage. You might just need a tune up. Dublin Auto's right in your backyard. Call Jon at (925)828-0243
ANSWER by ccsmog , October 19, 2011
What you are describing sounds like a classic vacuum leak problem. Check the back-side (firewall side) of the engine for a bad hose or a hose that may have been inadvertently left of during maintenance check. We find this to be common on the compact Fords. If you have any problems, we are a dignostic shop. Andre / Bart 925-947-2555
ANSWER by BoggsTR , April 03, 2013
Check your PCV valve and the hose attached to it. Common issue on the Focus. Cleaning the mass air flow sensor , air filter replacement , plugs ,wires and coils are the other likely gremlins.