Question about 1995 Chrysler Sebring

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Possible timing issue.

I know the computer controls the timing but is there a setting that the engine must be maintained at in idle and at say 2000 rpm?

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There is no setting on the idle for the timing. There is not an idle ajustment for this car.

Posted on Mar 03, 2009


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My 2000 new beetle dies when I turn the a/c on

I recommend you test the idle air control valve. See procedure below. If this is not the problem, please read additional possibilities at the link below.


The Idle Air Control (IAC) valve controls the amount of air that bypasses the throttle valve, which controls the engine idle speed. The IAC valve consists of windings, an armature, a return spring, and a rotary slide. The engine control module (ECM) pulses the voltage to the winding, the opposing forces on the armature by the return spring cause it to maintain a fixed position, adjusting the amount of bypass air to maintain the correct idle speed.

Removal & Installation

Turn the ignition switch to the OFF position.
Disconnect the idle air control valve harness electrical connector.
Using a suitable tool, remove idle air control valve.
Installation is in reverse order of removal.


Checking Idle Air Control Valve (IAC) Triggering
Check IAC valve is electrically OK.
Slide up boot on the IAC valve connector.

Fig. IAC Connector
Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger the IAC valve - N71.Connect VAG 1527B voltage tester, or equivalent, between terminal 1 and engine ground (GND). Voltage tester must flash.Connect VAG 1527B voltage tester, or equivalent, between terminal 2 and battery positive voltage (B+). Voltage tester must light up.If specified results are not obtained:Connect VAG 1598/19 test box, or equivalent, to ECM harness connector.Check the wiring between harness and connector terminal 1 (in engine compartment) to test box socket D11 . Then check the wiring between harness connector terminal 2 and test box socketD9 using wiring diagram. Repair as necessary.If the wiring is okay, but triggering still does not occur, replace the ECM.If the triggering signal and the wiring are okay and the valve does not react, replace the IAC valve. Checking Mechanical Function
Remove the idle air control (IAC) valve.Visually check the surface of the rotary slide (arrow) for signs of wear.

Fig. Showing the IAC Valve

Do NOT check for ease of movement by prying on the rotary slide with a screwdriver or other tools that could cause scratching or other damage.

Reconnect the IAC valve, while still removed, to the harness connector.Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger IAC valve - N71.Check whether rotary slide moves freely from stop to stop.If there are signs of scoring, or if the rotary slide does not move freely in both directions, replace the IAC valve.If the IAC valve does not respond (not triggered) during the Output Diagnostic Test Mode, check triggering. Resistance Test
Remove the idle air control valve harness connector.Use a suitable Digital Multimeter (DMM) to measure the resistance between the 2 terminals of the idle air control valve.The correct measurement should be 7-11 ohms. If not, replace the idle air control valve.
At room temperature, the resistance value will be lower. The resistance value will be higher if the Idle Air Control (IAC) valve is measured at under-hood operating temperatures.

Reconnect the idle air control valve harness connector.The idle air control valve should hum and vibrate slightly when the ignition is turned 'ON'. If not, the ECM or harness may be defective.

Do It Yourself Diagnosis and Repair

Aug 03, 2017 | Cars & Trucks

1 Answer

My 1998 Jeep wrangler is idling high I replace IAC Valve and still high, cleaned the throttle good still high, and the engine light is on.

hot engine or cold or both,? and how high is high?
which engine.???? USA car, not the Export? 2.5 or 4.0L
why ignore that CEL lamp. the PCM is trying so hard to communicate to you, so plug any scan tool on earth in that port, 16pin USA OBD2 port. (USA car?)
scan it , and get the codes. DTCs.
The car has MAP based system , called speed density.
all pro machinics knows that phrase.
the reason is Map BASED EFI , all race fast with air leaks.
what happens is the air leak is detected (the brain is clueless as to where) and the brain matches perfect fueling to said total air.
bam you are an expert. easy huh?

air leaks 101 (its is complex in diagnosis but IS simple physics.)
  1. why not state what too high is 801 rpm 1000, 2000 RPM.
  2. The plenum vacuum at near 20 inches.?
  3. All vacuum hoses leak free, or worse missing or fell off
  4. did you pinch all vacuum lines to find the leaker (rpm drops)
  5. is the throttle cable set tight? it must not ever be so.
  6. is the Throttle valve full of gunk blocking is close up.?
  7. the key to finding this is blocking all air paths 1 by 1.
  8. The engine coolant never reaches and holds 180F + temp.
  9. The fast idle input to the PCM is true.
  10. Some one hacked the throttle stop(factory set?)
  11. see magic below:

the IAC motor never fails but does love to stick
cleaned my 3 jeeps like a 100 times. in 500k miles total.
its just a simple stepper motor.
keep in mind fast idle speed is a feature of the ECU.

to prove i have leaks , on my 4.0L
i removed the IAS stepper, motor. and unscrewed (causing closed
then put it back with no connnector. and started the engine.
it hot idle screams YOU HAVE AIR LEAKS.
acid test, no engine can run with zero air supply, that is my magic.
controlling ALL that air. what ever that takes.

more data here.fsm words.
The PCM is also equipped with a memory program that records the number of steps the IAC stepper motor most recently advanced to during a certain set of parameters. For example: The PCM was attempting to maintain a 1000 rpm target during a cold start-up cycle. The last recorded number of steps for that may have been 125. That value would be recorded in the memory cell so that the next time the PCM recognizes the identical conditions; the PCM recalls that 125 steps were required to maintain the target. This program allows for greater customer satisfaction due to greater control of engine idle.
Another function of the memory program, which occurs when the power steering switch (if equipped), or the A/C request circuit, requires that the IAC stepper motor control engine rpm, is the recording of the last targeted steps into the memory cell. The PCM can anticipate A/C compressor loads. This is accomplished by delaying compressor operation for approximately 0.5 seconds until the PCM moves the IAC stepper motor to the recorded steps that were loaded into the memory cell. Using this program helps eliminate idle-quality changes as loads change. Finally, the PCM incorporates a No-Load engine speed limiter of approximately 1800 - 2000 rpm, when it recognizes that the TPS is indicating an idle signal and IAC motor cannot maintain engine idle. A (factory adjusted) set screw is used to mechanically limit the position of the throttle body throttle plate. The IAC motor through the PCM controls all idle speed functions.

Oct 20, 2014 | 1998 Jeep Wrangler

1 Answer

My 2000 Maxima stalls in cold weather when I back it out of the garage and runs rough until it's fully warmed up. Dealer changed the air meter (I think) which was ridiculously expensive at $990.00. It...

You might check the IAC valve, Idle Air Control valve. That lets the vehicle know where to idle especially when cold. Normally Air flow meter and O2 sensors will trigger a check engine light and set a code that allows the tech to try and diagnose the problem. Also, possibly check the Throttle body to make sure it is not clogged up and completely dirty inside, that too can cause issues. If this helps please give some thumbs up. Good luck.

Jan 19, 2011 | 2000 Nissan Maxima

1 Answer

Hi, I have a 2003 Buick Rendezvous with 101,000 miles on it. The car has been well maintained but recently developed a high idle issue. It appears to idle very fast, over 2000 rpms when it gets warm. ...


May 17, 2010 | 2003 Buick Rendezvous

1 Answer

Carburation & emission control?

check for broken or disconnected vacuum hose/line
also check for the fast idle sped control valve for defect

Mar 18, 2010 | 1983 Honda Accord

2 Answers

When in park honda odyssey revs up and down between 1000 and 2000 RPMs

is the check engine light on also? it sounds like the idle air control valve is bad. this controls the idle of the vehicle. when it is stuck open it causes too much air into the engine and causes it to rev. when it gets to a set rpm, the pcm cuts fuel. then it turns the fuel back on, then the engine revs, then it cuts fuel........code p0505 will prob be set

Nov 26, 2009 | 2000 Honda Odyssey

1 Answer

Stumbling idle, stalls when throttle opens

If the car is running that bad the check engine light should be on and code/s stored in the pcm along with a snapshot of what is going on at the time the code is set. A possible solution is to check the Mass Airflow Sensor or the MAP (manifold absolute pressure) sensor depending on which your vehicle is equipped with. The engine may run until the engine computer switches to closed loop fuel control (means its warmed up and the pcm is in control of the fuel trim) and then stall upon accel. Be sure you have checked all the basics first.

Apr 18, 2009 | 2000 Suzuki Esteem

1 Answer

Engine starts,reaches high rpm,then slowly returns to a rough idle, misses badly,no backfire,surges as if searching/adjusting air/ fuel/est,timing light shows mark constantly changing/erratic,engine then...

Vacuum leaks. Check all hoses and intake bolts. Leaking EGR or plugged PCV valve. Air filter plugged. Leaking head gasket. Worn timing chain. Camshaft lobes worn. Valves burned or leaking. Fuel idle control system or sensor. Good luck!

Apr 18, 2009 | 1991 Chevrolet Camaro

1 Answer

2004 sebring timing specs.

check the aic (aux idle air control valve) unplug it and see if it evens out you may have a vac leak please rate -jeff

Aug 02, 2008 | 2004 Chrysler Sebring

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