1998 Ford Escort ZX2 - Idle Air Control???

flyersdude24 · 11-07-2006, 09:21 AM

I have a 1998 Ford Escort ZX2 and when the car idles it vibrates like crazy. If anyone know what to do please help out. I need to know what you did or where the IAC is and how to adjust it.

Thanks

svtzx2 · 11-19-2006, 06:42 PM

Quote:

Originally Posted by flyersdude24

I have a 1998 Ford Escort ZX2 and when the car idles it vibrates like crazy. If anyone know what to do please help out. I need to know what you did or where the IAC is and how to adjust it.

Thanks

all ztech's idel rough first off i would check the pcv valve the rubber elbow likes to crack as for the iac the is no adjustment also you may want to up grade plugs and wires this will help it smooth it out a little

jhcaudill · 12-04-2006, 01:00 PM

Check this out
http://www.fcsdchemicalsandlubricant...tsb/031515.pdf

ZX2er · 03-18-2007, 01:45 PM

2 things. I don't know how, but our local Precision Lube put in 30 oz. too much when we recently got a tranny fluid change. Take out extra fluid that could damage the tranny and cause vibration.
Second, since the idle screw is glued in position, I got some lead (that's right, Pb) tape from the golf shop cut some small strips to built up the choke plate arm (about six strips thick) where it meets the idle screw to increase the idle. Getting it up to about 1400 rpm in Park will give you 1000 rpm in gear when at a stop. The engine stays smooth.

bonusbuilt 1950 · 03-19-2007, 06:09 PM

No adjustment on the IAC. They can stick over time, but usually the stall when there's a problem. There is a TSB from Ford on rough idle, but it only pertains to certain years.
You can remove the IAC and clean them with throttle body cleaner, but it's onlt a temporary fix.

Barry

xxtimlintxx · 09-05-2007, 08:48 PM

not saying i think this is your problem, but it was mine, and many others.. pcv valve and elbow leak.. the oem part is poorly designed IMO.. listen for hissing/sucking under throttle body.. the pcv valve is in the front of the engine (exaust side) and goes around right on top of thermostat housing and wraps around back under intake. my car would idle really low about 800 rpm to 1krpm.. it normally sits right above 1,100 rpm at idle..

bought new oem part.. but extended the section from the pcv valve in front of engine. now it doesn't put constant movement and strain on the elbow..

xxtimlintxx · 09-05-2007, 08:51 PM

you should not have to do that. your car should idle at about 1,100 and when you put it in gear.. drop but then come back up to about 1,000

ryanzx2 · 09-26-2007, 08:33 PM

i also have a 98 zx2 and i had the same idle problem it was terrible i checked the motor mounts they were half held together put new ones on it idles as smooth as a baby butt now u might want to check yours