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HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 5564
Experience:  25 years Auto experience, Ford ,GM, Chrysler, Asian & European
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Mother-in-laws car 2002escort zx2 idles low when warmed up,

Customer Question

mother-in-laws car 2002escort zx2 idles low when warmed up, w/or w/o.air on.put on new I.A.C.vavle. Take it out of drive idles goes up. Put air on ok for a min.then drops to 600 rpms. and shakes violently.
Submitted: 1 year ago.
Category: Ford
Expert:  HDGENE replied 1 year ago.

Hello was the check engine light on that prompted you to replace the iac valve? No vacuum leaks?

Customer: replied 1 year ago.
Light did come on no vacuum leaks
Expert:  HDGENE replied 1 year ago.

Was the code a P1506 or what code did you have?

Customer: replied 1 year ago.
I think it was 1504
Expert:  HDGENE replied 1 year ago.

Ok the most common problem that causes codes in this series is a collapsed pcv valve hose or the pcv valve itself is bad. Inspect thehose for being collapsed or sucking in air and replacing the pcv valve and hose if needed. clear the codes and recheck,