Have a 1988 crown vic, recently it started to idle very fast when letting off of gas pedal. I was in line at bank when it revved up. I put it in neutral and rpms must have increased to 3000.

Asked by Dec 01, 2013 at 07:15 PM about the 1988 Ford LTD Crown Victoria

Question type: Maintenance & Repair

When I put it in drive the rpms went back to normal.  this has happened several times.  It almost seems the throttle has stuck open.  I have also noticed that I can let off gas at 45 miles per hour and the speed will be maintained for mile or more or until I put on brakes to turn into drive.  What could be causing engine to just speed up while idling?

4 Answers

114,235

I would check for a vacuum leak.

1 of 1 people found this helpful.
15

i have a 86 crown vic lTD and my car did the same thing,there is cooling lines that go into the throdle body i by passed it and it has not done it since! all so could be EGR valve sticking

25,595

dandyoun has the right idea. 3000 RPM seems like a lot though. Your 302 (5.0L) is susceptible to vacuum leaks at the intake manifold too. Another thing to look at is the IAC valve and throttle body. They get a big build-up of crud over time and should be cleaned on occasion. (Another concern caused by the poor placement of the EGR)

2 of 2 people found this helpful.
15

yes i pulled my EGR off to clean, it was pretty drity carboned up

1 of 1 people found this helpful.

Your Answer

LTD Crown Victoria

Looking for a Used LTD Crown Victoria in your area?

CarGurus has 16 nationwide LTD Crown Victoria listings and the tools to find you a great deal.

ZIP:

Ford LTD Crown Victoria Experts

  • #1
    Tracy Hooks
    Reputation
    250
  • #2
    Michael Tutty
    Reputation
    150
  • #3
    F_O_R
    Reputation
    110
View All

Related Models For Sale

Used Ford Crown Victoria
4 Great Deals out of 1,182 listings starting at $1,496
Used Mercury Grand Marquis
35 Great Deals out of 1,768 listings starting at $1,950
Used Ford Mustang
714 Great Deals out of 38,332 listings starting at $895
Used Dodge Charger
454 Great Deals out of 28,014 listings starting at $1,979
Used Lincoln Town Car
36 Great Deals out of 1,762 listings starting at $1,500
Used Ford F-150
2,325 Great Deals out of 184,535 listings starting at $699
Used Chevrolet Caprice
194 listings starting at $10,595
Used Ford Taurus
257 Great Deals out of 16,468 listings starting at $1,850
Used Ford Bronco
195 listings
Used BMW 7 Series
152 Great Deals out of 5,828 listings starting at $2,999
Used Lincoln Continental
18 Great Deals out of 4,287 listings starting at $35,788
Used Chevrolet Camaro
425 Great Deals out of 30,917 listings starting at $3,550

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.