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Gloria Pratt Posted on Jan 24, 2020
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Where on the throttle body is the IAC of a 99 Mercury Grand Marquis?

1 Answer

Jeff Armer

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  • Mercury Master 3,418 Answers
  • Posted on Jan 24, 2020
Jeff Armer
Mercury Master
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Joined: Oct 21, 2018
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What engine does it have ?

  • Gloria Pratt
    Gloria Pratt Jan 24, 2020

    It has 4.6 L engine, V8

  • Gloria Pratt
    Gloria Pratt Jan 24, 2020

    It is a '99 Mercury Grand Marquis LS

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5 Related Answers

emissionwiz

Marvin

  • 85242 Answers
  • Posted on Dec 15, 2008

SOURCE: 2007 Mercury Grand Marquis required oil weight

If u have a moderate climate, 10W-30W, if cold climate 5W-30W, do not use any heavier weight of oils.

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Anonymous

  • 783 Answers
  • Posted on Feb 21, 2009

SOURCE: emergency fuel shut off switch for 1992 mercury grand marquis

It is in the trunk I can remember which side on a 92 but it will be behind the side trim panel almost straight down from the trunk hindge.

s60six

  • 328 Answers
  • Posted on Feb 28, 2009

SOURCE: mercury grand marquis

it is on the fender near the battery and is also referred to as the starter solenoid (if you follow the large wire from the positive terminal of the battery at the other end will be your relay/solenoid)
hope this helps!

Anonymous

  • 87 Answers
  • Posted on Mar 10, 2009

SOURCE: rear shocks on a 1996 Mercury Grand Marquis

2 bolts on the top of shocks and 1 bolt on the bottom but the top 2 bolts are a pain in the neck

Anonymous

  • 564 Answers
  • Posted on May 08, 2010

SOURCE: how to replace starter +1993 Mercury Grand Marquis

disconnect battery,,jack car up,,put jack stand on frame,,take starter bolts out,(may not be easy),,take wires off starter,,hoped it helped,,

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Related Questions:

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Where is the IAC VALVE located on a 1992 mercury grand Marquis

Should be attached to throttle-body. two wire connector, wire colors, red, and white with lite blue tracer.
iac 1-d0y1d1jyikdpmr2b2xh0kfds-4-0.jpg
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Where is iac on 92 grand marquis

ecdf7be4-6e36-43a6-ae01-e1e123cd0f24.jpg iac valve for 92 grand marquis $40 - $112. is by the throttle body.
1helpful
1answer

1993 Mercury Grand Marquis Idle air control valve hose makes a buzzing sound. I replaced the IAC and it seemed to be better for a short period of time, after a couple of drive cycles, now there is a...

I have replaced many of these valves for the same noise problem, only one thing comes to mind the throttle body is full of sludge and restricting airflow, clean it with throttle body cleaner and a soft rag, then disconnect the battery for 5 minutes to reset learned idle strategy, if that doesn't clear the problem you either have a defective valve or you have the wrong part, there are about 4 of these valves, the correct valve for your car looks like this one below. I also will include Motorcraft part #

MOTORCRAFT Part # CX1660
emissionwiz_206.jpg
1helpful
1answer

How do i remove and clean the IAC

Operation

The Idle Air Control (IAC) valve adjusts the engine idle speed. The valve is located on the side of the throttle body. The valve is controlled by a duty cycle signal from the PCM and allows air to bypass the throttle plate in order to maintain the proper idle speed. Do NOT attempt to clean the IAC valve. Carburetor tune-up cleaners or any type of solvent cleaners will damage the internal components of the valve.
The Idle Air Control (IAC) valve adjusts the engine idle speed. The valve is located on the throttle body. The valve is controlled by a duty cycle signal from the PCM and allows air to bypass the throttle plate in order to maintain the proper idle speed.
Removal & Installation

  1. Disconnect the negative battery cable.
  2. Detach the IAC solenoid connector.
  3. Remove the two retaining bolts and remove the IAC solenoid and gasket from the throttle body.
  4. Installation is the reverse of the removal procedure. Use a new gasket and tighten the retaining bolts to 71-97 inch lbs. (8-11 Nm).
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Need electronic control unit for 1995 grand marquis

There is a throttle position sensor and ther is also an iac (idle air control) module. The iac failure usually results in a very high idle
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92 Grand Marquis chugs and dies when at an idle. Also jerks alot

The throttle speed control valve must be cleaned. The valve is located near the throttle body throat. It has an oval flange with two bolts. Unplug it, take it off and clean it out with throttle body cleaner. You will notice a big difference. This is a common issue with this engine.
Please remember to rate this fix.
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