Idle racing after a IAC replacement. How do I slow this thing down to normal?

Asked by Oct 03, 2015 at 08:40 PM about the 1997 Ford E-150

Question type: Maintenance & Repair

I replaced an IAC valve on a 97 Ford E-150 with a 4.6L v-8 due to it
making an annoying, loud humming noise. After replacing the valve on the
first attempt to start the engine the humming got worse and was constant.
I took the valve off again and then checked the gasket then reinstalled the
IAC. Started the engine again and this time there was no humming but the
engine was racing at idle. What can I do to stop this?

2 Answers

325

sounds like the iac passages are stopped up , id try and take iac and clean the passages out , it will get rid of the humming also, good luck, or you have a big vacuum leak,

1 of 1 people found this helpful.

Turns out the auto parts store gave me the wrong part. The box and number were correct but the part inside was wrong. So now I wait for the hopefully correct part to be shipped in because no one carries the part in stock.

Your Answer

Ford E-150 Experts

  • #1
    Tracy Hooks
    Reputation
    530
  • #2
    kbro
    Reputation
    440
  • #3
    tennisshoes
    Reputation
    400
View All

Related Models For Sale

Used Ford F-150
3,301 Great Deals out of 224,490 listings starting at $1,200
Used Ford E-350
214 listings starting at $4,995
Used Dodge Ram 1500
413 Great Deals out of 11,096 listings starting at $1,500
Used GMC Sierra 1500
1,226 Great Deals out of 64,898 listings starting at $999
Used Ford F-250
447 listings starting at $2,500
Used Toyota Tacoma
722 Great Deals out of 45,870 listings starting at $2,500
Used Chevrolet Express
83 Great Deals out of 5,438 listings starting at $2,995

Used Cars For Sale

1997 Ford E-150 For Sale
13 listings starting at $3,999

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.