What can I try next?

Asked by Jan 21, 2016 at 05:54 PM about the 1991 Ford F-250

Question type: Maintenance & Repair

I have recently replaced the battery. Every time I want to start it, I have to
boost it. It won't idle down just races like crazy even if I let it run for 10-15
minutes. And after I shut it off I have to boost it again. It started doing this
about 2 or 3 months ago.

2 Answers

71,425

Check the alternator sounds like it is bad,the idling issue could be a vacume leak.

107,745

First off you have a major draw on the battery, recharge the battery and then do the battery draw test to find the culprit that is killing the battery, as with all Fords start by electrically disconnecting the alternator, if the test light goes out then bingo you have your culprit, if not then proceed. After you fixed the draw then set the park brake and block the wheels, start the engine and then put it in gear if an automatic, if not an automatic push in the clutch and hold, then turn everything electrical on and let it idle, the idle should start to come down and stabilize after a few minutes, if it doesn't then look for a major vacuum leak and also check the ISC unit, it maybe stuck.

Your Answer

Ford F-250 Experts

  • #1
    tennisshoes
    Reputation
    690
  • #2
    F_O_R
    Reputation
    400
  • #3
    dandyoun
    Reputation
    350
View All

Related Models For Sale

Used Ford F-150
3,206 Great Deals out of 226,353 listings starting at $1,250
Used Ford F-350
285 listings starting at $6,900
Used GMC Sierra 1500
1,229 Great Deals out of 63,095 listings starting at $1,200
Used GMC Sierra 2500
164 listings starting at $4,200
Used Ford Mustang
457 Great Deals out of 42,831 listings starting at $1,488

Used Cars For Sale

1999 Ford F-250 For Sale
24 listings starting at $4,295
1997 Ford F-250 For Sale
126 listings starting at $2,900

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.