Question about 1995 Mitsubishi Montero

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Idling Step Up

I have 2 problems , which are related. During cold start-up , the idling is sometimes very low (400 - 600 Rpm) is engine cutt out when aircon is on and/or engine is place dunder stress from the power steering pump during turning operations. The other side of the problem is much to high start-up idling (1500 - 200 Rpm) which presents a problem to the Automatic Gearbox during first shift into drive and reverse. The engine management system and/or the service computer is not reporting any errors. Any ideas.

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Possibly a slight vacum leak?

Posted on Jan 09, 2009

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Vibrations during idling


which engine.??? never post lacking engine ,here is why.
1.3 L G13B I4
1.5 L G15A I4
1.6 L G16B I4
1.8 L J18A I4
1.8 L BP-ZE I4
1.9 L XUD9 diesel I4

Ill answer in the generic and for GAS engines. only.
that is illegal RPM, the ECU regulates it to 800 all the time
that means the ECU can not regulate the RPM now, for many reasons.
and sure it vibrates too low, that is normal for all 4cylinders to do that.
no bad engine mounts never lower RPM to 600, ever.
they dont control idle speed at all.
the #1 reason for most cars to idle too low are:
1: EGR leaks, (clean it)
2: ISC stuck closed (electric idle speed acututor dirty) clean it.
3: gross misfiring , caused by bad spark or bad fuel mix.
4: low compression on 1 or more cylinders (real low) Do compression test at WOT. throttle.



Apr 19, 2014 | 1997 Suzuki Baleno

1 Answer

Truck dies when idling


HI
first I would like to tell you, do this procedure only if the 5th digit of your VIN is C or K.

Description

The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. The idle may be unstable or a DTC may set if the throttle position is not learned.

Conditions for Running the Throttle Learn Procedure

• DTCs P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0506, and P0507 are not set.

• The engine speed is between 450-4,000 RPM.

• The manifold absolute pressure (MAP) is greater than 5 kPa.

• The mass air flow (MAF) is greater than 2 g/s.

• The ignition 1 voltage is greater than 10 volts.

Throttle Learn

Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code

(DTC) List - Vehicle.

1. Start and idle the engine in PARK for 3 minutes.

2. With a scan tool, monitor desired and actual RPM.

3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease.

4. Ignition OFF for 60 seconds.

5. Start and idle the engine in PARK for 3 minutes.

6. After the 3 minute run time the engine should be idling normal.

Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn.

* If the engine idle speed has not been learned the vehicle will need to be driven at

speeds above 70 km/h (44 mph) with several decelerations and extended idles.

7. After the drive cycle, the engine should be idling normally.

* If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds

and repeat step 6.
8. Once the engine speed has returned to normal, clear DTCs.
Good Luck

Mar 04, 2014 | 1995 GMC Sierra

1 Answer

Engine vibration at idling


Check engine light has reported that the cpu has found sensoes out of parametyers during the checks. Check fault codes for oxygen sensor, idle speed sensor and air flow sensor.

Feb 10, 2013 | 1994 Jeep Cherokee

1 Answer

I have this problem for quite a bit. The idling speed when engine started cold is between 700-800 rpm. As the engine gets hotted idling rpm increase to almost 1000rpm. If idling is adjusted back, the rpm...


There appears to be a thermal movement of choke mechanism that comes about once vehicle is warmed up. Check the chock connections, hot water pipe and linkages tight or clear.
gazakat

Oct 18, 2010 | Nissan Sentra Cars & Trucks

1 Answer

Hard starting in cold weather; engine surges while idling, engine dies when you lift up on the accelerator, poor fuel mileage, sometimes it does not show the preceding problems but does most of the time.


Hi
Surging is usually a vacuum leak, look around to see if a vac hose was knocked loose during the sensor installation.
Start your car and let it idle.when it starts doing its "thing" turn the heater/ ac selector to off.However for further advice clean all the sensors free from soot, starting with the MAP sensor, then to the 02 sensor, and the idle adjustment valve. disconnect the battery prior to it so that no voltage spikes may damage the ECU.
check the ignition timing if it is set to the specified degree. Next, check the idle valve to make sure that the proper engine speed is reached while idling.Adjust the throttle cable settings to get rid off the slack. After doing so, the RPM should seem great.The engine should come to life and almost straight to the specified RPM.
For hard starting in cold weather.. Try using a winter oil (5W-xx or 10W-xx) and run a tank of super unleaded through it.
OR
run gas line antifreeze in tank if it's really cold, also if you have fuel injection it may be a faulty temp. sensor, if it's a carburated vehicle it could be the atomatic choke not working as it should, but yeah 5w30 oil is good for the cold season
Thanks for contacting fixya.com

Dec 10, 2009 | 1995 Chevrolet K1500

1 Answer

I have a high idle/overheating 1989 Toyota Carona GLXi 2.0 litre DOHC fuel injected. (New Zealand/Japanese import) I have 2 problems, and probably related. the car is overheating (heaters have stopped...


Check the hoses - especially all the little 10mm hoses that connect vacuum pipes, etc.
There is a device in the throttle body called an Idle Stabilisation Valve - they get gummed up, especially on such an old car, and with NZ's low-petroleum fuel - lots of additives in NZ gas.
They are easy enough to clean - look for a lead plugged into the throttle body near the butterfly - you can unclip it and pull it out complete - they are usually about 15cm long, by about 4cm wide.
Spray it liberally with carb cleaner and make sure it can move freely. If not, a wrecker is the best bet - they are pricey new.
Good luck.

Aug 20, 2009 | Toyota Corolla Cars & Trucks

2 Answers

94 Camry idling is low


have your IAC valve (idle air control valve)checked, replace or cleaned. Clean intake with carb/intake cleaner including MAF sensor(V-6 only). Hopefully this helps

Jul 23, 2009 | 1994 Toyota Camry

1 Answer

My car threatens to die during idling...the rpm drops down low and then goes back to normal. It started doing this during driving too. I just had the fuel filter and a few other fuel related things...


Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) 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.

Mar 29, 2009 | 2001 Oldsmobile Alero

3 Answers

98 Isuzu Trooper stalls on cold start, idle issues..


I had the same issue on my 99 Trooper.

It would usually start when completely cold, but idle around 2k RPM.
It would drive fine. But if I shut it down, ran into a store, and came back out, it would start but immediately idle.
Had to ride the gas a little to get it into gear.
The Check Engine light has been going on and off for 6 months or so.

I took this to my local trusted repair shop (no Isuzu dealers within 200 miles).
The diagnosed the light, and found that the Intake Gaskets were bad or leaking.
The idling problem was related to the car not being able to control the amount of air coming in.

They replaced the Intake gaskets by the next day, and I haven't had a problem since. And no more check engine light, which has been on half a year.

Here's some details from my bill:
(1) Intake Gasket set $107.95
Misc materials $21.00
2.1 hours of Labor

The total cost to me was $345.00, and I definately don't feel gipped.

Jan 06, 2009 | 1999 Isuzu Trooper

1 Answer

Engine idling varies depending on light or aircon is on/off


dude its normal for first start or cold start that the idle is ok but it must high than normal... its normal because the engine is warming up it self... when it gets warm, the idle speed will return normal idle... your engine is 1200cc, it has not much HP for a great load... and i know its a carburatored engine and its an old engine, your head lyt and a/c fan and aux fan and all the electrical system on your car, uses the HP of you engine and its a lot of load to the alternator driven by the engine to generate an electricity they need and thats why the engine rpm speed lowering down to dead and its shake. thats why when you use your lyts or all electrical, you engine is weakening... the best remede is adjusting you idle speed... its located behind the carburator.. its a small black knob.. just make a twist each eighter way and you'll find out if your idle rpm speed ts incresing or decresing.. just increase it and try opening your lyts and other electrical, if its still shaking then adjust it a little more

Aug 26, 2008 | 1994 Honda Civic

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