Question about 1998 Mercury Tracer

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99 grand marquis error code p1506 check engine light on how to fix problem engine idle speed 700 rpm

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: high idle speed

Check for a cracked or lose vaccumme line

Posted on Jul 26, 2008

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emissionwiz
  • 80668 Answers

SOURCE: 99 Grand Marquis won't stay started when engine cold.

Here is the most common cause of this stall, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) 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

Posted on Nov 06, 2008

  • 12 Answers

SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Posted on Feb 07, 2009

  • 2 Answers

SOURCE: engine stalls after cold start-up & release from high speed idle

I had a similar problem.  I found the filter cartridge below the pcv valve had carboned up, and after the crank case pressurized, oil was forced out the pcv supply line to the throttle body.  The idle air control valve solenoid got oil in it and caused my problem, but only when it was cold.  The pcv cartridge is accessed by removing the pcv valve and the rubber fitting that the pcv valve mounts in.  It can then be fished out with a pick set, and it is a pain because you can't see it, but you can get you hand back there.  I hope this helps you.

Posted on Feb 28, 2009

  • 1 Answer

SOURCE: Aveo 1.5 L engine, RPM is high and reaches 2500 at idle speed

you may try to isolate the TPS and IDLE and MAP inputs from the fuse box make a direct connection from control ouput to the fuse box this operation will require a professional technical
you may feed me back if it works

Posted on Apr 11, 2009

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1 Answer

CHECK ENGINE LIGHT IS ON


This Code is about the RPM not matching the idle settings. A Vacuum leak is tricking the engine into making adjustments based on a lean O2 reading. Correspondingly the O2 sensors are demanding more fuel to eliminate the lean readings. Then the engine realizes the amount of air going by the MAF is not matching the IAC settings(Because the air leak is increasing rpm) and blames the IAC which is a Code P1506.

With the engine running, use an old spray bottle and fill it with water. Spray the seams, vacuum lines and solenoids until you notice a change in RPM. Lastly, spray the EGR pod if the diaphragm is torn it will leak vacuum.

Wherever you find the leak, fix it, then clear the computer and drive it.

Feb 19, 2014 | 2000 Mercury Grand Marquis

1 Answer

Code p1506


P1506 - Idle Air Control (IAC) Overspeed Error This DTC is set when the PCM detects engine idle speed that is greater than the desired rpm.
  • IAC circuit short to GND
  • Damaged IAC valve
Disconnect IAC valve and look for little or no change in engine rpm as an indication of a stuck or damaged valve.
Ford Idle Air Control IAC valve test how to adjust minimum idle speed
Ford Idle Air Control Valve Diagnostics High Idle DTC P1506

Dec 05, 2017 | 2000 Ford Explorer

2 Answers

Code P1506, 2002 ford taurus wagpn


P1506 Idle Air Control
Overspeed Error

IAC Valve--Bad
Vacuum Leaks
IAC Stuck Open
Failed EAVP System

Disconnect the valve--if little
or no change in RPM,then
Valve is stuck or bad

Mar 16, 2011 | 2000 Ford Taurus

2 Answers

1999 gran marq has new alternater,fuel pump and filter,spark plugs and boots but still skips while idleing and mostly while accelerating,,,getting worse also


I will try to add a few things to check. It sounds like bad plug wires or a coil going out. Sometimes if you water mist the coil and wires with a spray bottle you can see the sparks jump. It will be easier to see in a dark area with the motor running.

The Intake manifolds were changed from metal to plastic to prevent carbon buildup in the EGR passage. This would be under the Metal Airhorn and under the gasket where it attaches to the top of the Intake. There is a groove to clean that carbons up and throws bad codes and interferes with the engine running good. 8 bolts and a $10 gasket and 1Hour of your time to fix it.

You have not mentioned any codes or testing results. Your onboard computer can be checked for free at Autozone or Oreillys. Your "check engine" light should start setting defect codes if your misfires are getting worse. Also, if you can remember a wet plug when you removed your old plugs, that would be a good indicator of a bad wire for that cylinder.

Let me know if you have been fixed.

Oct 28, 2010 | 1999 Mercury Grand Marquis

1 Answer

What does code p1506 mean?


P1506 - Idle Air Control (IAC) Overspeed Error This DTC is set when the PCM detects engine idle speed that is greater than the desired rpm.
  • IAC circuit short to GND
  • Damaged IAC valve
Disconnect IAC valve and look for little or no change in engine rpm as an indication of a stuck or damaged valve.

Oct 17, 2010 | 2000 Mercury Sable

2 Answers

Check Engine light code 1506


Dear Sir,

P1506 error refers to Idle Air Control System Overspeed Detected.
So solution is check your Air control system wires,and check air control speed once again.
If this not solves your problem back with the result,leave a feedback we happy to help you.


Have a nice day

Good luck


Sep 16, 2009 | 1995 Mazda 626

1 Answer

Will crank up and will not idle, cuts off. had fuel pump replaced


There are to many things that can cause your blazer from idling.
Go to Auto Zone or Parts Source and they can scan your blazers computer. There should be a DTC code which should make you understand why your having the problem.
I believe they both scan for free and may have the parts you need to replace and give you the how to do it your self instruction for the repair:
 Good luck and hope this helps, here are some codes that control ther idle speed of your engine. It's the air idle control valve that may have gone bad or it just may be a dirty or stuck EGR valve. The scan should let you know.

P1505 Idle Air Control At Adaptive Clip

P1506 Idle Air Control System Over speed Error

P1507 Idle Air Control System Under speed Error

P1508 Idle Air Control (IAC) System - Low RPM

May 05, 2009 | 2001 Chevrolet Blazer

1 Answer

1999 f150 4x4 , p1506


P1506 Idle Air Control Overspeed Error


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.


TESTING PROCEDURE


  1. Turn the ignition switch to the OFF position.
  2. Disconnect the wiring harness from the IAC valve.
  3. Measure the resistance between the terminals of the valve.

Due to the diode in the solenoid, place the ohmmeter positive lead on the emphasis type="medium" VPWR/emphasis terminal and the negative lead on the emphasis type="medium" ISC/emphasis terminal.
  1. Resistance should be 6-13 ohms.
  2. If resistance is not within specification, the valve may be faulty.
Please rate and god bless:)

Apr 25, 2009 | 1999 Ford F150 Regular Cab

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