Return to the Cars Forum | Post a Follow-Up

 o
93 crown vic

Posted by drewhon (My Page) on
Fri, Nov 18, 05 at 20:37

1993 crown vic the problem is when you first take off in the morning.The car has a miss and makes a poping noise in the exhaust right below the driver and passangers feet and the car does some mild jerking.Then it clears up in 2miles and runs great. If you let the car sit for a few hrs and go to drive it the problem is back for 2 to 3 more miles then clears up again..123,000 miles on the car if that helps?
Thanks DREW


Follow-Up Postings:

 o
RE: 93 crown vic

Knowing the car's mileage helps a little.
Assure that all the maintenance and service work are up to date.
When cold, one or two plugs are not firing - causing the popping and the miss..But I would say that the plugs are OK at this point.
Or some hydraulic lifters are not functioning well when cold. But this may also yield an audible underhood ticking sound....


 o
RE: 93 crown vic

How about getting back with us, Drewhon, and relating as to what caused the problem - and the solution..


 o
RE: 93 crown vic

At 123,000 miles, some valve/valve-stems may be worn allowing some valves to tip sideways a bit due to a small amount of side thrust from the valve actuator mechanism. These valves do not seal well. In other cases, some valves may be sticking giving the same result.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Cars Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here