Question about 2004 Ford F150

1 Answer

2004 ford f150 idle goes up and down also when you brake at a stop rpm goes very low to almost shutting down

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 74 Answers

Hi, i would venture to say that you have an air leak somewhere, ie; a split in a vacumn hose or the like check all your hoses on the intake side for bad fit or splits. hope this helps, thanks for useing fixya!

Posted on Feb 21, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

High idle at start up 2200rpm then slowly drops but always seems high have to ride brakes to stop


Long High idle after start up - YotaTech Forums

www.yotatech.com/f116/long-high-idle-after-start-up-246386/
Dec 20, 2011 - aviator's Avatar ... When the high idle is no longer needed the piston retracts and the throttle ... Sometimes the piston gets gunky and slow to react... clean the ... you are already idling higher then normal the idle up will only be worse... for ... it takes to kick down when I first start it up, high idle is at 2200 RPM it ...Missing: lincoln

High idle at start up - F150online Forums

www.f150online.com/forums/v8.../306364-high-idle-start-up.html
Oct 27, 2007 - ... King Ranch · Lightning · Lincoln Blackwood & Mark LT · SuperCrew · SVT ... my 2000 when its been sitting goes up close to 2k then drops down in seconds. ... so what your saying is when it's cold outside I can expect it to start andidle at 2200 rpm. sounds pretty off to me. ... Vehicle: 2004 Ford F150 5.4L. 4.6l Intermittent High Idle. Why?
Jul 12, 2005
Dual remote oil filters????
Jun 29, 2001
More results from www.f150online.com

Nov 30, 2015 | 2004 Lincoln Aviator

1 Answer

My Ford F150 engine stopped running at low RPM.. I wonder if it's bad gas? Clogged Fuel filter?


The first thing to check is the Fuel pressure at the Fuel Injector Rail schrader valve. You can get an inexpensive test kit at Harbor Freight. The pressure should be between 28 and 45 psi with the engine running. If it is lower than that you can replace the filter. If that doesn't cure the pressure problem then the pump is next. Fuel Filter Change Ford 150 250 How to Replace Fuel Pump

Oct 27, 2015 | 2004 Ford F150

1 Answer

On my 2005 F/expdn, if I am on red light stop, when rpm goes under 50 x 1000 my car shutdown. If I keep it above 50 by pressing accelrator is OK, pl suggest


1st your car should not idle below 110 rpm even in gear

idle problems on these are caused by both broken or open vac ports or a dirty throttle body the A/F ratio cant get a correct reading

Feb 18, 2015 | 2005 Ford Expedition Eddie

1 Answer

Why should the truck shut down at a low idle or when u apply the brake to it the idle slows down an it cuts off on a 1992 ford f150


In some cases, the throttle body is dirty or the iac valve is faulty.
I would start with those two things.

Oct 11, 2012 | 1992 Ford F150 SuperCab

1 Answer

04 ford 5.4 lariat skips and now shuts off when accelerating idles fine low and high rpm until u put in gear. This only happens when hot. No codes


check all vaccum lines connected to the engine, then possibly replace the ignition coil to cap wire

May 06, 2012 | 2004 Ford F150

1 Answer

My idle is a little shakey as well as very low on 1990 ford truck


check throttle position sensor and or the idle air control valv both are on the throttle body

Apr 20, 2010 | 1990 Ford F150

1 Answer

I have a 1996 F150 4x4 with a 5 liter/302 engine, manual tramsmission. When I push the clutch in to shift the engine races and the tach goes up then after a few minutes it will idle down. I have replaced...


Check the PCV valve and the PCV hose where the elbow is near the TB. It may be stuck open and the hose may have a crack, Squeeze it while engine is running. Also are you sure its not brake related. The check valve on the booster can fail. Does the RPM change when you apply just the brake ??
Also spray some brake cleaner around the base of the TB looking for a RPM increase. Spray around any vacuum source.

Apr 14, 2010 | 1996 Ford F150 Regular Cab

1 Answer

2004 ford f150 ranger shuts off during operation tach stays up arround 2000 rpm while in gear engine does not rev when pushing on pedal out of gear nor does the rpm change when in gear. few seconds later...


Is this a diesel?If it is check the fuel filter.If it is a gas burner,check the air flow(air filter,and filter box)for a plastic bag or paper sack sucked up in the intake duct.If this checks out fine ,have the cat.checked to see if it is stopped up.

Aug 29, 2009 | 2004 Ford F150

2 Answers

When i turn on the A/C my f150 will not idle. At traveling speed, runs fine. Stop at red light, truck dies


Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Jun 26, 2009 | 1999 Ford F150 Regular Cab

Not finding what you are looking for?
2004 Ford F150 Logo

Related Topics:

492 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Fordexpert

Level 3 Expert

5331 Answers

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

Answer questions

Manuals & User Guides

Loading...