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rpmdiag, Tech and Instructor
Category: Ford
Satisfied Customers: 7740
Experience:  Since 1975
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It stalls out or rough idles intermittently when coming to a

Customer Question

It stalls out or rough idles intermittently when coming to a stop. It is a 2005 Ford Focus ZX4 ST manual with the 2.3.
JA: Is the check engine light on?
Customer: No
JA: Are you fixing your Focus yourself? What have you tried so far?
Customer: I have replaced the idle air control, checked all the spark plugs, and did a smoke test for vacuum leaks.
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 9 months ago.
Category: Ford
Expert:  rpmdiag replied 9 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 9 months ago.

When there are no codes and still a problem,it's time to attach a scan tool and start monitoring all the PID's to see what is going on.

O attached a re-learn procedure for you too to try and see if this fixes it.

Thanks, Ron

Customer: replied 9 months ago.
you're telling me to attach a tool to monitor it? I already googled and tried the relearn procedure prior to trying the idle air control.
Customer: replied 9 months ago.
then again after the idle air control.
Expert:  rpmdiag replied 9 months ago.

Yes, we're trying to find the problem and you are not getting codes so we need to monitor the PID's to see where we're off if the re-learn didn't work. This isn't odd, we see this all the time.

Thanks again and please remember to rate me 5 stars and keep this link for when you need me again later on.


Customer: replied 9 months ago.
I feel you aren't telling me anything other than what a google search would. If I had a tool to use to connect and monitor what the car is doing, I wouldn't really need to ask for help finding out what the car is doing.
Expert:  rpmdiag replied 9 months ago.

Our goal here is to assist you in the repair of your vehicle by
supplying you with well educated information. We may not always
have the exact fix you wanted to hear, but our job is to get you on
the right track, which we always do. We can’t hear, see, smell or
touch your vehicle from where we’re at, so your understanding of
that is greatly appreciated. There are no magical or miraculous
answers, but we do our best to guide you in the right direction.