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Is it normal to have a rough idle and brake in time on a 150 mercury four stroke motor in the break-in .

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: 98 Mercury Tracer idle drops at a dead stop and

Check your PCV valve tube (to the right side of the top of the engine. When mine did this, the tubing for the PCV valve had dry rotted and cracked, thus losing pressure and stalled the car. Ford parts department has these at any dealership if that is the problem.

Posted on Jun 20, 2009

thunderalley
  • 432 Answers

SOURCE: 1994 Nissan Altima GXE Engine miss

check your EGR and for vacuum leaks

Posted on Oct 03, 2009

  • 532 Answers

SOURCE: 2001 ford 4.6 liter idles rough sometimes dies

may need 1 0r more coil packs replaced,or it could be what happened to my 2000 4.6---1 lifter expanded out and wouldnt collapse,causing the rocker arm to fall out of place and the valve could never open...try unplugging 1 coil pack at a time while running and listen for a change in the way it runs,if there isnt a change then its probably a bad coil pack,find a cylinder that runs and swap the coil packs,if no difference then its probably the valve staying shut.

Posted on Nov 22, 2009

  • 57 Answers

SOURCE: 1999 Mercury Sable 24v OHC engine, starts normal

this is a difficult one..
check for vacuum leaks by possibly a visual inspection and then spraying starting fluid around hoses , intake and so on..if any change, you might have found a vacuum leak/bad gasket.
otherwise, DO clean the Idle Air Control Valve 1st.
then check and clean EGR valve next..

Posted on Sep 30, 2010

  • 6468 Answers

SOURCE: 2006 ford focus idles rough and stalls when braking. Any ideas?

clean the throttle body

Posted on Aug 30, 2012

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Mercury 150 hp 2 stroke 2003 everything runs fine with idle throttle lever engaged but when you put motor into gear i stalls idle to slow how do you adjust it thanks


If someone changed props this can cause this problem. You need to be careful that any adjustment is made for throttle rod and not for carbs if not an injected engine. You do not want to fool around with air mixture. Some throttle cables use threaded linkage and length of rod is adjustment for rpm. Others use a stop screw or hex head to move the throttle lever away from the housings.

Apr 01, 2017 | Mercury Cars & Trucks

1 Answer

2000 mercury villager, runs a fast idle. whether cold or warm the idle remains at a high idle speed, it even pulls with the brake applied.


Could be a vac leak, or a dirty throttle body, or a faulty idle air control valve. The computer controls idle speed by regulating the amount of air into the intake. Could also be something pulling on the throttle cable such as the cruise control.

Sep 28, 2012 | 2000 Mercury Villager

2 Answers

I have 1999Chevy suburban with 6.5 turbo diesel motor.it idles up and down and when driving the gas pedal is real touchy Wat is the problem and were do i locate the problem


Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html---------
Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
-------Complete loss of brake pedal then all gets normal? http://repairhelpcenter.blogspot.com/2012/01/complete-loss-of-brake-pedal-then-all.html
------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
--------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?

http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

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After replacing brake rotors and pads, brake pedal remains on floor? http://technoanswers.blogspot.in/2012/02/after-replacing-brake-rotors-and-pads.html

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accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

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will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

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runs lean and idles rough?

http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

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Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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This will help.

Thanks.

Mar 01, 2012 | 1999 GMC Suburban

1 Answer

I have a 1994 Honda Accord 4 door v6. I have rough idle when in drive and smooth idle when in neutral. Also rough take offs from a stop or slow speeds. If I pump the gas pedal a few time the rough take...


  • does the engine miss? bumps is a rythmic pattern?
  • an engine miss will appear to diminish at higher rpm due to centrifical force.
  • other possible problem broken or flat motor mount.
  • is the idle rough in reverse?
  • if not
  • open hood
  • start engine
  • Left foot on brake (hard)
  • start engine
  • watch engine as you select drive
  • still holding brake with left foot / throttle gas with right foot
  • does engine dramatically move?
  • if so replace motor mount on offending side
  • if not possible engine miss or transmission problems

Jul 10, 2010 | 1994 Honda Accord

1 Answer

How do I know when it's time to replace a timing belt on my 2003 Sorento? A local mechanic said it idles rough because the teeth are breaking off on the belt. How would he know that by just replacing spark...


It's unlikely that the cam belt would cause rough idle!!
normally you would change the cambelt after so many miles Mine are always changed after 30k miles regardless. The mechanic was purley guessing.

If the idle is rough then it will be an electronic fault like air flow meter,EGR valve, Idle control unit. etc

Get back to me if you need more info.

Regards

Dan

Feb 01, 2010 | 2003 Kia Sorento

2 Answers

1987 mercury topaz that has a rough idle and then stalls, the car will not stay on


Three things come to mind.

First is it a rough idle at normal rpm level which could indicate the throttle body needs cleaning.

Second is you have a faulty Idle Air Control valve (IAC)'

Third is you have clogged or dripping injectors. Injectors should have a smooth cylindrical spray pattern.

Jul 14, 2009 | 1987 Mercury Topaz 2 Door

1 Answer

My 1999 Ford escort idles rough when the car is in drive and im on the break.


While this can come from several sources, a 'normal' misfire from a single plug can cause that. Another possibility is the idle air control may not be functioning as it should.
You didn't mention it but we can assume you have an automatic transmission. Standing with the brakes on and the tranny in drive, does load down the engine somewhat (drag) so nearly anything out of whack can cause the rough idle.  

Mar 26, 2009 | 1999 Ford Escort

1 Answer

Rough idle


have this car taken to an auto repair and ask for a engine oil flush and engine oil change, that mught help

May 27, 2008 | 1999 Mercury Grand Marquis

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