Question about 2004 Mercury Grand Marquis

1 Answer

Can a air idle conrol valve whistle when cold

I have his problem with my car whistling on a cold crank. I have checked all vaccumm lines and replaced pcv valve. Still does it, but once the engine is warm it stops. any help.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Mercury Master
  • 2,431 Answers

You are so right the IAC can make that whistling sound,

Posted on Nov 06, 2012

6 Suggested Answers

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

  • 238 Answers

SOURCE: 2002 merc cougar 2.5 liter has loud whistling

Sounds like a vacuume leak, use some carb cleaner in a spray can and gently spray the engine. When you find the leak the engine will stumble, check in that area for the leak.

Posted on Apr 26, 2010

  • 740 Answers

SOURCE: Car won't idle without revving when cold and dies when in drive

This Vehicle needs an Idle air control/Idle speed motor. Good Luck

Posted on Dec 28, 2008

  • 170 Answers

SOURCE: Only runs ruff during park and idle.

Your EGR valve shouldn't open up during idle or the engine will run rough and may even stall. Remove it and clean the plunger and port with a wire brush and some carb cleaner. Test the diaphragm with a vacuum pump. If it doesn't work after cleaning, or the diaphragm is bad, buy a new EGR valve.

Posted on Feb 06, 2009

warlock61
  • 659 Answers

SOURCE: Car not idling adn stalling when it is cold

sounds like the idle control vale is sticking when it is cold. It is located on the throttlebody right at the air inlet

Posted on Mar 01, 2009

SOURCE: 1999 tracer with an engine idle that increases and

Other than the idle control/throttle sensor the other items will not usually cause bucking or change of idle. After you drive awhile from a cold start the coolant temp sensor comes into play,then the EGR valve if vacuum is involved under load. So I quess your mechanic missed monitoring the 02 sensors after testing the fuel system. Hard to imagine. Have to road test hot for Egr and other drivability issues. You need a good drivability tech and always stick with best in their field. Hard to find. Have you ever gone for a drive with the person going to work on your car sitting in the pass seat. If they don't insist on that before they ever look at your veh or take your money--enough said. Did they call you to see if your happy with their performance? If not move on. MAF,AIT, most likely on idle and EGR on bucking. Quick look at 02 sensors You or they did a good job,Just didn't hit a home run,still on second base.

Posted on Sep 29, 2009

Testimonial: "i am not sure what the "MAF or AIT" are or what they do.I will replace the EGR valve.Thanks.."

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

I have a 2003 ford expedition with the 5.4L that whistles at 30,60, and 70 mph when its cold out


Not sure the significance of the cold part. Typically when I hear a vehicle whistling, if it's under the hood, I always suspect a vacuum leak. A late model vehicle like that should throw a check engine light and some trouble codes if it were a vacuum leak.

Jan 04, 2015 | Cars & Trucks

1 Answer

Whistling noise under slight acceleration


check for a manifold gasket / pipe leak

Apr 04, 2014 | Ford F-150 Cars & Trucks

1 Answer

2002 Pontiac grand am suddenly stopped running while driving now just hums when trying to start


run fault codes and check for cam/crank position sensor fault. check that the cam shaft is turning over ( broken timing belt) The whistling sound is probably air from compression escaping past bent valves.

Jan 23, 2014 | Cars & Trucks

2 Answers

96 ford prob gt whistling very loudly when accelerated


IAC idle air control valve is not working. Let me know how you make out?

Jun 20, 2012 | 1996 Ford Probe

1 Answer

Every morning when I switch on the engine I can hear a whistle for 10-20 minutes even when I am driving the whistle persists until (I guess) the engine gets warm or something like that. Ford Focus...


Sounds like it could be a vacuum leak or possibly the PCV valve. See if you can locate the source of the whistle with the hood up. The PCV valve could have popped out of the valve cover. Check vacuum lines where they attach to the intake. When is the last time the air filter was replaced? Just poke around and listen carefully and you'll find it. Safety first so keep in mind the engine is running. Watch the belt and pulleys and know some things will burn you instantly.

Aug 03, 2011 | 2001 Ford Focus

2 Answers

Hi, my 2002 malibu hesitate and whistle when I accelerate. It only works fine under 20mph, but when it exceed, it whistles and hesitate on accelerating. On highway, it barely goes up to 60mph and when...


Whistle noise indicates a major vacuum leak. Maybe something loose in the intake system. Maybe a vacuum hose disconnected. Will explain lose of power also.

Jun 24, 2011 | 2002 Chevrolet Malibu

1 Answer

Whistleing noise on start up sometimes unbilievably loud .i know tree lincolns that do the same noise. Not consistant.and only cold


You need a new IAC (idle air control valve). They get stuck and make a loud noise when they go bad. Their design has been updated.

94840a9.jpg

Mar 22, 2010 | 1996 Lincoln Town Car

1 Answer

My 2003 Ford Explorer has a high pitched whistle around 2000 RMPs. If I accelerate or decelerate the whistle stops. I've replaced the idle aircontrol valve, as I read this could be a possible solution to...


you may have a tensioner or idler pulley starting to go bad. They make a high pitched whistle when the bearings are on thier way.

Simply have someone slowly bring it up to 2000 rpm and listen with the end of a wooden broom handle touching the center bolt on each. Be careful not to get caught.

If you're not used to this you may be able to hear it whithout use of the "hearing aid"

Your drive belt may simply need dressing. You can buy this at almost any auto parts store for about 4 bucks. (dont use anthing else as you will cause the belt to stretch creating more issues)

Jan 01, 2010 | 2003 Ford Explorer

2 Answers

My 1994 Jeep Grand Cherokee is making a whistling sound. It whistles when I am giving it gas even coasting. But when I slow down, it stops or gets quieter. We changed the PCV valves and hoses for the...


Often a whistling sound, from the engine bay anyway, is the sign of a vacuum line that is leaking. Might want to check all the vacuum lines for cracks and such and make sure they are all connected.

Dec 31, 2008 | 1999 Jeep Grand Cherokee

1 Answer

To much air pressure im my crank case valve, i believe thats what it is called. a whistling sound comes from the car it make the idle jump and the brakes seem a bit harder to push, when it makes this sound...


sounds like you have a bust vacuum pipe somewhere possibly between the vacuum pump and the brake servo
the engine is sucking in extra air which will cause the idle to jump and run erraticly
hope this helps

Jul 28, 2008 | 2005 Volvo S60

Not finding what you are looking for?
2004 Mercury Grand Marquis Logo

250 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

75817 Answers

fordexpert

Level 3 Expert

5495 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides

Loading...