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Discussion Starter · #1 ·
Hello Escort fans!

I have an issue with the idle of my 1994 LX model (1.9 engine) where the engine idle "surges" or "lunges" once it is warm. I've replaced the EGR valve but this has had no effect. I'm thinking that it may be the EVR solinoid, which has a vacuum line from the EGR valve and the valve cover, but I would like someone elses opinion/theory. I'm new to the EGR system and kinda guessing at this point....

thanks!
 

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I think if you disconect the EGR vac line, the EGR valve will stay closed. Then run the and see if it continues. It is still runs bad with the EGR valve shut, then it's somting else. (assuming the valve is'nt stuck half open) (and plug the other end of the vac line you disconected.

Double check all the other vac lines, and main intake hose. The intake manifold gasket can leak also.
 

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Discussion Starter · #3 ·
I removed the hose from the EGR valve but this had no effect. However, when I removed the vacuum hose from the valve cover, this seemed to improve the idle. Does this mean that its the EVR solinoid? I've read other posts that speak of an "IAC"....what is this unit, and could it also have something to do with my problem?

Thanks again
 

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Discussion Starter · #4 ·
Surging idle problem solved!!!!!

Hey guys/gals!!!

Wanted to let everyone know what I did to solve this problem:

First, my 1994 1.9L escort has 160K miles on it, so I thought that perhaps the problem was the EGR valve. I replaced the EGR valve but I still had the problem.

Second, I started tracing all of the vacuum hoses for cracks/holes and found none. As I did this, I trimmed off the ends of each hose so that I was sure to have a good seal. However, I still had the problem!

Third, I checked the intake manifold for looseness, and I did find a couple that were a little loose, but even after all of that I still had the problem!

Finally, I read on FEOA some posts that stated they had cleaned the IAC valve, located on the throttle body, with electronic compoent cleaner. So, I took my IAC off and sure enough it was pretty dirty. I took the cleaner and began the cleaning process. After this, I installed the newly cleaned IAC and...........SUCCESS!!!!! It's running like a new car!!!!

Thanks FEOA!!! Couldn't have done it without ya!!! :D
 
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