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rpmdiag
rpmdiag, Tech and Instructor
Category: Ford
Satisfied Customers: 7355
Experience:  Since 1975
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2005 Ford Escape 3.0L front wheel drive. I have a pooping

Customer Question

2005 Ford Escape 3.0L front wheel drive. I have a pooping sound coming from my throttle body. It only happens after the engine warms and only at idle.
Submitted: 8 months ago.
Category: Ford
Expert:  rpmdiag replied 8 months ago.

Hi, welcome to Just Answer. I’m Ron and I’ll be helping you
today.
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

Sounds like a bad throttle body, but let's try a re-learn on it first. See attachment.

Thanks, Ron

Customer: replied 8 months ago.
Forgot to mention, I already did that.
Expert:  rpmdiag replied 8 months ago.

You did this EXACT procedure? Did you read it yet?

Ron

Customer: replied 8 months ago.
I read it, and yes that is what I did except I left the cables connected for longer than 15 minutes because I was doing other things. The Ford manual also tells you how to do that.
Customer: replied 8 months ago.
I can do it again in about an hour.
Expert:  rpmdiag replied 8 months ago.

No, that's not necessary. Are you certain the noise is coming from the throttle body? Is the engine rough when this happens?

Ron

Customer: replied 8 months ago.
if you remove the air filter cover you can hear it really well. Yes the engine idols rough when it does this. Looks like the rpm's range from 640 - 820.
Expert:  rpmdiag replied 8 months ago.

Then you need to check engine compression for a valve issue, That's what's wrong.

thanks again and please remember my 5 star rating:)

Thanks, Ron

Customer: replied 8 months ago.
When you disconnect the IAC valve the popping sound stops. I would think if it were a valve it would continue to do it no? I have replaced the IAC valve twice, I suppose it is possible that they were both bad but not likely.
Expert:  rpmdiag replied 8 months ago.
I didn't know that. This may be a computer issue then.
Thanks
5
Expert:  rpmdiag replied 8 months ago.
The iac needs to be tested with a scan tool in bidirectional mode yo confirm it.
Thanks
Ron
Customer: replied 8 months ago.
I worked on it some more this afternoon and noticed that if I manually increase the throttle about 100 to 200 rpm's the popping stops.
Expert:  rpmdiag replied 8 months ago.

That iac port must be filled with carbon and the pintle valve on the IAC is hitting it. Clean the ports real good.

Ron

Customer: replied 8 months ago.
Are you referring to the port on the valve or throttle body? The iac valve is brand new.
Expert:  rpmdiag replied 8 months ago.

The whole behind the IAC valve needs to be clear. You can change valves all day long, but if the port behind the valve is plugged, this valve won't work.

Ron

Ron

Customer: replied 8 months ago.
The link below shows what my valve looks like. It is a complete unit. Did you want me to clean the port area that it bolts to?
https://www.amazon.com/Standard-Motor-Products-AC469-Control/dp/B001DCGSDM/ref=sr_1_2?s=automotive&ie=UTF8&qid=1471266458&vehicle=2005-54-659-656--9--5-8026-2101-1-1-742-10-3-0&sr=1-2&ymm=2005%3Aford%3Aescape&keywords=iac+valve
Expert:  rpmdiag replied 8 months ago.

YES, Please rate me now too.

Thanks, Ron