Question about Poulan Wild Thing 2375 18" Gas Chain Saw 2.5 Cuin

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Engine stalls idles great but stall when you but on break or throttle down during a cut

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Sound like the clutch is not disengging. The springs in it are likely week. Take note as to weather the chain stops when it is idleing. If it seem to idle at a reasonable speed and the chain does not stop turning, the clutch is most likely the problem. This problem can be caused by trying to work the saw without the throttle wide open. When the clutch slips it creates heat wich will over heat, and weeken the springs used to disengage the clutch. It is also possible that it was defective when new.

Posted on Jan 10, 2009

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Posted on Jan 02, 2017

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Stalling


.... Robert Grove
johnallen496, when you say it stalls at low speeds and stops, do you mean when slowing down and coming to a stop? does it stall at low speeds while the car is moving with your foot on the pedal just a little like when driving through a parking lot?...

I used the wrong box above, oh well ....

The most common cause of stalling at low speeds, especially idling and decelerating to a stop is carbon buildup. The throttle plates get coated with carbon closing down the opening slightly, this affects the idle speed, causing the engine to stall at idle and coming to a stop.

also carbon builds up in the cylinders and absorbs fuel intended to be burnt, leaning out the mixture and causing rough/low idle and stalling - especially when the engine is cold. Dirty injectors can cause the same symptoms/results

As a maintenance routine It's good to have the throttle plates cleaned and perform a top engine de-carbon treatment, and fuel injection service in more severe cases

Sea Foam makes a spray that works great for minor de-carbon service, just spay it into the throttle plates while it is running, one to two cans will do, add a can of Sea Foam or Techron to the gas tank each time you fill up for the next few tank full's.

If you still have problems sek out a qualified professional

Good luck!

Robert Grove, WEGO2U Mobile Mechanics
Orange County Mobile Mechanic Orange County Mobile Mechanics 714 709 4594

Feb 17, 2014 | 2006 Dodge Charger

Tip

Idle Air Speed Control valve on engines



1.4) IACV Idle Air Control Valve - Idle Speed Control Unit(actuator)

What is it? The idle air control valve is an electrically driven mechanism that allows additional control over the throttle at idle.

Where is it located? The IACV is located on or near to the throttle body and consists of a small device with an electrical connector.

How does it work? When the throttle is closed the throttle plate closes offair from the inlet manifold and normally this would cause the engine to stall immediately. To allow the engine to keep running the ECU makes use of the IACV system to permit the ingress of a limited amount of air. The IACV device is seen in two forms either a) a small motor driven valve on a passageway allowing air indirectly to pass to the inlet manifold plenum or b) a motor located on theTPS assembly that opens the throttle plate by a small degree to allow air through directly. Both systems are designed to allow air to by-pass the 'closed' throttle plate to maintain engine idle. The IAC also helps throttle respond to additional power demands being made on the engine such as using the power steering, air conditioning or moving the (automatic) transmission selector into 'drive'. Somecar manufacturers also have a separate 'hot idle' valve system and this is designed to operate for a relatively short period just during engine warm up. Such hot idle systems are accompanied by electrically driven IAC valves to maintain engine idle in the face of additional power demands.

Symptoms of faulty IACV
Associated OBD2 error codesDTCs: P1508, P1509

  • Poor starting, sudden stall: If the IACV fails to open or the inlet/exit ports are clogged shut with oily deposits the engine may ignite and then promptly stall. The engine can be kept running by pressing the accelerator. However any additional demand on the engine such as power steering or putting the car into drive (automatic) will cause the engine to stumble badly or stall.
  • Engine stall at stop sign: Even with the engine is warmed up, if the car comes to a halt such as a stop light the engine may stall. The engine will often restart immediately with little trouble

Thisdiffers from:-
a) TPS fault - engine stall when theaccelerator is depressed quickly, but will often restart without much trouble.
b) CKP or CMP fault - engine cuts out without warning and is resistant torestart until cooled down

How to check? Physically remove the IACV, keep the electrical connection and examine the state of the valve for carbon build up. Blank off the exposed IACV port(s) on the throttle body and turn the engine on; you may have to give it extra throttle until the engine has warmed up. Monitor the IACV valve movement in response to additional loads (power steering inputs etc) the valve should open and close according to demand. When refitted this action results change in engine speed in response to increased power demand.

The electrical connector to the IACV can have 2 or 4 pins:-
2pins: resistance between socket pins should about 10 OHMS +/- 3 OHMS. If this resistance is very high then there is break and the IACV is at fault.
4pins: resistance between diagonally positioned pins should be about 20 OHMS. If the resistance is very high this indicates that the IACV is faulty.

Resistance between the actual metal valve body and either of the socket pins should be greater than 10,000 OHMS. If there is little or no resistance thenthere is a short and the IACV is faulty.

How to fix? If the motor of the IACV has failed (no movement and fault resistance values) then replace it. If the valve is gummed closed by baked oil and carbon then clean it thoroughly with WD40 or carburettor/choke cleaner spray and a cloth. Similarly if the entry and exit ports on the throttle body to the IACV look dirty again clean them out thoroughly.


NEXT 1.5) TAC Throttle Actuator Control

on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

My nissan sentra 1987 stops, stalls and cuts off engine


Engine stall or RPM fluctuates at idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Sep 28, 2012 | 1995 Nissan Sentra

1 Answer

What's your problem?I have a 2000 Lincoln LS that runs great when driving but as soon as I stop and sit a minute it cuts off. I have noticed the car start stalling a little before it cuts off. Cou


Generally speaking, the common reasons for stalling are a faulty idle air control valve or a dirty throttle body.
The computer controls idle speed by how much air is allowed into the intake thru the throttle body.
Those two issues would be checked first.
Is the check engine light on when the engine is running ?

Sep 20, 2012 | 2000 Lincoln LS

1 Answer

2500 HD chevrolet low idle problem


Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Sep 03, 2012 | Chevrolet Silverado 2500HD Cars & Trucks

1 Answer

I have a 1990 dodge dakota 3.9 liter v6...idles rough and stalls out at stopping...i have changed cap rotor plugs and wires...and also the throttle positioning sensor...no change..any ideas would be...


Do the service below.

Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If this doesn't improve the problem you have mechanical problems in the engine like a low cylinder die to worn rings or leaking valve seats.



Jun 23, 2012 | 1990 Dodge Dakota

1 Answer

I have aVW jetta 4, 2.0 highline, 2001 that stalls engine at low gears. The situation becomes worse when the aircon is on.


Engine stalling issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control



Jun 08, 2012 | Cars & Trucks

2 Answers

I purchased a 1997 chevy blazer ... looks great interior and exterior... but when I drive and stop, i have to keep 1 foot on gas pedal and one foot on break. what do i do ?


Here is the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), 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.

To correct this problem get a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, spray it into the air intake of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is know clean, if you continue to have the stall out the idle speed control valve may be defective and requires replacement.

Mar 04, 2011 | 1997 Chevrolet Blazer

1 Answer

Ford Focus cutting out


Here is the most common cause of surges and stalls, 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.

Dec 03, 2008 | 2000 Ford Focus

2 Answers

Stalling & hunting idle


does throttle sensor check out correctly???

Jun 10, 2008 | 1995 Volkswagen GTI

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