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Old June 30th, 2006, 02:15 AM   #1
Arnie897
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Default Crown Vic won't idle

Friends old boxy LTD Crown Victoria won't idle and dies when it's warm out. It has the EFI 5.0. Just did a basic tune up and that didn't help. Any 5-oh guys know what the problem may be?
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Old June 30th, 2006, 09:07 AM   #2
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does it throw a CEL?

Does it idle any better in N?
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Old June 30th, 2006, 01:03 PM   #3
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HAHA the VIC! my best friend had a crown vic that was passed through the family when they lived at home...man...that car brings back some memories and good stories!

sorry for the tangent :tonka:
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Old June 30th, 2006, 02:39 PM   #4
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Quote:
Originally Posted by Bones
does it throw a CEL?

Does it idle any better in N?
I don't think that car has a working CEL. Neutral is same as park and drive.
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Old July 1st, 2006, 04:12 PM   #5
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Have you cleaned the throttle body and the throttle plate?

Also there is a filter under the pcv in the rear of the lower intake. these filters plug and cause excess blow-by into the tb, coating the throttle plate.

I can get you the motorcraft part number for the filter tomarrow.

Adam
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Old July 1st, 2006, 04:30 PM   #6
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Wonder if that was one of the not so wonderful motorcraft ignition module years...
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Old July 1st, 2006, 05:02 PM   #7
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Check your vaccum lines.
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Old July 4th, 2006, 06:21 PM   #8
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Check the EGR vave.
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Old July 4th, 2006, 06:36 PM   #9
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What is the best way to check a EGR valve or a vaccume line?
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Old July 5th, 2006, 06:27 AM   #10
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Listen for hissing. There is a T-shaped vacuum fitting in the very rear of the engine towards the passenger side that is known for going bad. Take a look there.
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Old July 26th, 2006, 08:48 AM   #11
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What year crown vic? I have an 83 with TBI 302 while the newer ones (85+?) where TPI 5.0's


*edit* Whoops, sorry. reading Pwns me.
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Old July 27th, 2006, 12:41 PM   #12
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My Crown Vic was a little newer, but I had an idle problem and replaced the TPS (throttle position sensor). Never had a problem after that. My 94 Bronco had the 5.0 also and I had to replace the same sensor on it. It would die everytime I was coming off the highway, especially if I had the cruise on. Nothing like driving 65mph and your engine stalls abruptly.

Roger
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