I have a 2005 Escape V-6 w/28K miles. Occassional - almost unnoticable -
small backfire [more of a hiccup] only when starting cold. I inspected the
TB and found it coated with soot behind the butterfly and going back into
the intake manifold. Odd.
No codes shown.
Seems out of normal.
Any idea of what I should be looking for?
Thanks for any comments.
It could be a few things. Check the Idle Air Control valve- it'll be on the
duct leading from your filter box to the throttle body. It has 2 screws
holding it on and an electrical connector. Sometimes the piston inside will
stick, giving problems when cold, and most times will not set a code. Here's
what it looks like:
You can use any electrical cleaner to clean it up, if that seems to be the
The SUV must be cherry, being 6 years old and only 28K miles on it. Does it
sit up much without being driven?? Check the air filter. Maybe mice have
made a home in the intake LOL!
With that little mileage, is it still under warranty (I don't remember the
"years" part of it)? If so, have the dealership check it out. I assume
regular maintenance has been performed on it, such as oil changes?
In Hawaii, not so much long distance driving! Such low mileage vehicles are
I changed the air filter. [No mice or geckos.]
I checked the IAC and could see soot below. Cleaned the IAC.
I had my helper start the car cold and could more of a "click" than a
misfire when the car started. This is only when cold.
I have several spare COPs that I will swap out even thouigh I have no codes.
Sound logical? Possible?
I lived on Oahu from age 7 to 9. My dad was stationed at Kaneohe. That was
back in '53. I'll bet it all has changed between then and now :-)
Does the clicking you hear sound like a spark leak? Does it keep it up for a
short while when the engine is cold, then go away? It's entirely possible
that one of the wire boots has broken down, or the grease has dried out, and
it's sparking to ground. Maybe even a crack in one of the COP's. Bad part
is, most everything around them is plastic if the '05 V6 is anything like my
'02 V6. If you take the 'beauty' cover off and start it up, can you hear
where the clicking is coming from? If you do it at night (really dark, no
street lights), can you see any sparking?
You can swap out the COP's if you want, but that's a lot of work for not
knowing if that's really the problem. If you do, I'd get new boots (if the
COP's didn't come with them), a tube of dielectric grease, and the upper
manifold gasket set (about $12 from RockAuto.com). That should eliminate
having to take it all apart again. If you haven't had the manifold off
before, here's a pretty good instruction set:
It's for a 2001 but an '05 should be quite similar, I would think.
I'm in Kaneohe. We have a mall and movies but still fairly rural where I am
beyond Heiia harbor. Taro patch nearby, etc.
I've changed COPs before but since I "think" the sound comes from the front,
I just swapped the front 3. No "beauty" cover on this 2005 so a whole 5
minute job. And these were spare good COPs from a 2001 Escape I sold.
The "click" is once only, just as the engine engages from a cold start.
Makes it hard to track down. Not "clicking" but not really a "backfire."
Odd, to me, but I assume related to the soot in the TB. I'll see in the
morning when I can do a cold start.
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