How do I find the problem

5

Asked by Mar 29, 2015 at 07:07 PM about the 1990 Ford F-250 2 Dr XLT Lariat Standard Cab LB

Question type: Maintenance & Repair

My 90 f250 will start but will not idle.

1 Answer

98,515

The most common on these Fords was the ISC unit, they either got dirty and the port wouldn't open or the DC motor just failed, pull it off, clean the ports on the valve and manifold, put it back on and then check to see if it idles, if not, then try pulling the codes to see if something else is causing the problem.

Your Answer

Ford F-250 Experts

  • #1
    tennisshoes
    Reputation
    660
  • #2
    F_O_R
    Reputation
    360
  • #3
    dandyoun
    Reputation
    350
View All

Related Models For Sale

Used Ford F-150
2,131 Great Deals out of 181,877 listings starting at $1,000
Used Ford F-350
300 listings starting at $6,949
Used GMC Sierra 1500
782 Great Deals out of 67,756 listings starting at $1,350
Used GMC Sierra 2500
155 listings starting at $4,800

Used Cars For Sale

1999 Ford F-250 For Sale
28 listings starting at $1,295
1997 Ford F-250 For Sale
130 listings starting at $4,995

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.