Crown Vic won't idle

[Arnie897]

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?

[Bones]

does it throw a CEL?

Does it idle any better in N?

[wakebabe]

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:

[Arnie897]

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.

[frdboy]

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

[Tonka]

Wonder if that was one of the not so wonderful motorcraft ignition module years...

[max5p33d]

Check your vaccum lines.

[Big Daddy Rubicon]

Check the EGR vave.

[Arnie897]

What is the best way to check a EGR valve or a vaccume line?

[GreaseMonkey]

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.

[smasheromalley]

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.

[Calvynandhobbs]

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