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linemanforthecounty
New User
Aug 29, 2013, 8:40 AM
Post #1 of 6
(1699 views)
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2001 Escape 3.0 V6 2WD
I have been chasing a rough idle for a couple weeks now. No CEL and no codes from the PCM. I can hear a "hiss" coming from the rear intake so now it is just a matter of locating its exact location (PCV, Brake Booster?). I have seen lots of opinions on both sides of the aisle about spraying carb cleaner back there (I do not have a propane torch or smoke machine to use instead, though I realize those are both probably safer) to catch a leak. Will carb cleaner be fine or am I risking my eyebrows? Visual inspection showed no collapsed lines so i am suspected a hairline crack or bad elbow.
Notes: Idle worse with A/C running. In addition to the rough idle I get a hiccup and RPM loss when slowly accelerating through 40-50mph
Already Done: Plugs, IAC, Fuel Filter all replaced, TB cleaned
Any and all help would be much appreciated!
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 29, 2013, 8:50 AM
Post #2 of 6
(1697 views)
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Carb cleaner will be fine. Just don't spray it at a spot that you are already seeing unexplained sparks like one other fool did here.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 29, 2013, 4:34 PM
Post #3 of 6
(1672 views)
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I'm surprised this hasn't triggered any trouble codes.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 30, 2013, 11:30 AM
Post #4 of 6
(1649 views)
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? Rough idle and you can hear vacuum leaking. Why is that so hard to locate? Plain water would find that - just mist suspect area or if carb cleaner watch out for what you are spraying it. Kaboom if all wrong,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 30, 2013, 2:52 PM
Post #5 of 6
(1638 views)
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No, you have to use something flammable so it will richen the mixture when drawn in through the leak. That's the only way the engine is going to respond.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 30, 2013, 4:03 PM
Post #6 of 6
(1630 views)
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If loud enough to hear it would stumble. Shouldn't really need anything but wiggle hoses or a finger (away from hazards) on a bad leak and it would change/stop maybe,
T
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