Question about 1992 Ford F250

2 Answers

Ford truck f250 v8 motor idles high after engine heats up it idles higher cant find a vacuum leak replaced a idle air valve it didnt help

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Ford Master
  • 75,066 Answers

The vacuum leak that causes this high idle is the gasket at the bottom of the upper intake manifold runners, they **** in, done 100's. to confirm this just spray carb cleaner at inside and outside base, when u hit the leak you will hear it. see photo.

ford truck f250 v8 motor idles high - 29f44ce.jpg

Posted on May 10, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 316 Answers

Most likely your leak is the "intake plenum" gasket. The easiest way to find a vacuum leak is to get a can of starting fluid, and spray it around the intake and vacuum hoses while it's running.
Be careful, starting fluid is extremely flammable!
If you notice an accelleration, or de-celleration while spraying the starting fluid you should be able to pinpoint your leak. I have seen this issue several times on ford trucks, and it is usually a leaking intake plenum gasket.

I hope thios helps you, and I wish you luck on your repair.

Posted on May 10, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What sensors will cause engine idle to fluxuate


intake air control valve,map or maf sensor.pcv valve or leak from vacuum hose.damaged or perished air box to throttle body pipe

Dec 24, 2015 | 1996 Ford Explorer

1 Answer

I have a 2002 taurus idles high from 1000 to 1800 rpm's, 2-5 seconds when hot or cold then comes down to correct idle, happens on start up or driving. Suggestions?


chech engine light is letting you know that the idle air valve has been disconnected. looks like you have a bad idle air valve.

Aug 19, 2014 | 2002 Ford Taurus

2 Answers

Code p0507


possible causes are:

Dirty throttle body
Electric throttle control actuator incorrectly adjusted/faulty/damaged
Air leak on Intake
Poor electrical connection to the Intake Air Control valve

P0507 KIA Idle Air Control IAC System RPM Higher Than Expected

May 14, 2014 | 2003 Kia Sedona

1 Answer

Ford f250 runs ruff and will not idle


fuel pressure should be 35 - 45 psi.could have faulty tps sensor.could have intake vacuum leak or ignition timing valve timing off due to worn timing chain.do engine vacuum test replace all vacuum hoses bad leaking egr valve diaphram or gasket will cause engine run poorly.

Jul 29, 2013 | 1997 Ford F250 SuperCab

1 Answer

Idle too high


check egr may be stuck open brake booster could have a leak internally. check pcv valve and all vacuum hoses for leak

Aug 02, 2012 | Chevrolet Express Cars & Trucks

1 Answer

5.4 ford idles to high


I'm kinda guessing the "hose" you are "pinching" off is the air assist to your injectors as most IAC Valves don't have any hoses unless it's this type of system. Are you gettting any codes or is your check engine light on ? I would guess that you have a vacuum leak which would be the most common cause of this kind of thing. You can check for one by spraying some carb/thottle body cleaner on your vacuum lines and aound the intake manifold, if the idle changes as you are spraying, you have located the general area of the vacuum leaks. If you are haveing problems in the IAC valve your check engine light should come on and pulling the code(s) will help you to narrow down the problem. Comment here to let me know if you have the light on and if you are gettting any codes and what they are. This would help me to help you better. Below I gave you a description of how the system works to help you understand the system better. I would check for a vacuum leak first. I know this wasn't a whole lot of help but I hope it helped you a little bit anyhow.


1_27_2012_11_28_38_pm.jpg1_27_2012_11_28_58_pm.jpg

Jan 27, 2012 | Ford Cars & Trucks

1 Answer

96 eclipse non-turbo idles way too high, disconnect MAP sensor it goes down but then idles rough


Yes by disconneting the map sensor will drop idle and make run rough, the problem is the idle air control valve or a vacuum leak, try to clean the throtlebody with an old tooth brush and some throtlebody spray cleaner if that doesnt help then try having the iac valve checked the iac valve (Idle air control valve ) if with the engine running listen for a hissing noise that will be a vacuum leak, these are the most common reasons for higher than normal idle. hope this is helpful.

Dec 05, 2010 | 1996 Mitsubishi Eclipse

3 Answers

2001 FORD F250 5.4L HIGH IDLE PROBLEMS.CHANGED IAC AND STILL THE SAME


High idle
Changed IAC still the same, shown on scanner IAC 50-60 %, if it set to 40% the Idle is ok. What cause the PCM to set IAC too high? Is any one know?

Apr 18, 2010 | 2001 Ford F250 Super Duty Super Cab

Not finding what you are looking for?
1992 Ford F250 Logo

Related Topics:

566 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75051 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

fordexpert

Level 3 Expert

5470 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...