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

86,515

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

Add photo

Related Questions

Search Ford F-250 Questions

Ford F-250 Experts

#1 tennisshoes
tennisshoes
Reputation 580
#2 FordNut
FordNut
Reputation 510
#3 dandyoun
dandyoun
Reputation 340
View All

Related Models For Sale

Used Ford F-150
2,884 Great Deals out of 212,656 listings starting at $1,000
Used Ford F-350
340 listings starting at $1,500
Used GMC Sierra 1500
931 Great Deals out of 62,271 listings starting at $1,395
Used GMC Sierra 2500
200 listings starting at $5,995
Used Ford Mustang
399 Great Deals out of 44,403 listings starting at $1,000

Used Cars For Sale

1999 Ford F-250 For Sale
25 listings starting at $3,500
1998 Ford F-250 For Sale
15 listings starting at $3,990