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1994 Ford Crown Victoria with rough idling


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Neti
User

Dec 5, 2012, 6:28 PM

Post #1 of 6 (1853 views)
1994 Ford Crown Victoria with rough idling Sign In

Hello. I'm having a issue with my 1994 Crown Victoria (4.6L engine) in which during operation the engine idles very rough. Has about 100,000 miles. It seems to improve for a few seconds during acceleration , but goes back to being rough. I plan to check the electrical to see if that it is the problem , and other such things but so far I am baffled. Hoping it's not a stuck valve. This issue could be many things , so I apologize if this question is too vague , but I plan to do more extensive testing. Thanks for any possible help you can provide.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 5, 2012, 6:30 PM

Post #2 of 6 (1851 views)
Re: 1994 Ford Crown Victoria with rough idling Sign In

What's the status of the obvious things like plugs, wires and coil?



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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.



Mechman
New User

Dec 5, 2012, 6:49 PM

Post #3 of 6 (1839 views)
Re: 1994 Ford Crown Victoria with rough idling Sign In

Also , I forgot to add that while it is running rough , there is a very deep vibration that can be felt inside the cabin. While the car is cold or still warming up , when the heater is running there is a very slight smell of gasoline , but goes away when the car gets warmer. When the car hits high RPM , the engine runs fine for a moment , but goes back to being rough.

I do plan to check electrical , so I'll post my results when I can get to that.

Oops,sorry, I logged into the wrong account when I made this post.


(This post was edited by Mechman on Dec 5, 2012, 6:50 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 5, 2012, 6:53 PM

Post #4 of 6 (1833 views)
Re: 1994 Ford Crown Victoria with rough idling Sign In

Multiple accounts are not allowed. You need to stick with one account. I am blocking the last one



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Dec 5, 2012, 6:53 PM

Post #5 of 6 (1829 views)
Re: 1994 Ford Crown Victoria with rough idling Sign In

Also check for vacuum leaks. Listen for hissing noises. The PCV elbow at the throttle body likes to become mushy and suck itself in causing a vacuum leak.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 5, 2012, 6:54 PM)


Neti
User

Dec 5, 2012, 7:02 PM

Post #6 of 6 (1819 views)
Re: 1994 Ford Crown Victoria with rough idling Sign In

Sorry , I didn't check the rules. I'll stick with this account.






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