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Malaguti rcx12 won't idle

I have taken carburettor off and nothing is blocked, I have to keep the throttle on a little to stop it from stalling. Any help would be greatly appreciated as I bought this my son for Christmas and he hasn't been able to have a good go on it thanks.

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  • Contributor
  • 7 Answers

Well Seek a help of an expertise to see the prob.
thanks

Posted on Dec 30, 2016

Testimonial: "Do u mean 'you should seek help from a expert to find the problem ' ??"

  • Kirk Hicken
    Kirk Hicken Dec 30, 2016

    Do you mean ' you should seek help from a expert to find the problem' ??

  • Emmazone
    Emmazone Jan 05, 2017

    yea

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Keeps stalling. How can we keep it running? Carburetor problems?


On most carburettor vehicles, there is an electric idle jet. If it is faulty or if the connection has come loose, the car won't idle. Check wires going to the carburettor and you should find it. Hold your ear near the carb and get someone to switch the car on & off, you should hear a click. If not, make sure of a good connection else replace the electric jet. Hope this helps

Aug 25, 2015 | Cars & Trucks

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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 1992 Subaru Brumby Ute stalls each time I pull up or stop.


expose the carburetor throat and start the engine keeping it running with your hand on the throttle. try and control the idle at its lowest possible rpm and look inside the throat. if it is showing ANY dripping fuel or even wet flaps then it is stalling because of too much fuel and the carb. will have to be cleaned or serviced.

Mar 30, 2013 | Cars & Trucks

1 Answer

1994 GMC SIERRA HESITATION PROBLEM!!


How's the EGR Valve?

Have you looked at the TPS Sensor with a
scope, for bad spots or is it adjustable,that
you can do with a volt meter

The symptom sounds vacuum related

Is the exhaust converter as old as the truck?

O2 Sensor 100,000 miles or more?

Is the a MAP Sensor?

Sep 05, 2012 | Cars & Trucks

1 Answer

91 Toyota 4runner stalling


Try to clean the Throttle body of your engine I believe you never did, Also check whether you have also Air Flow Meter which is situated on the Flex Intake Hose of the engine.If so remove it by disconnecting the connector and remove the 2 little screws. Take it in your hands and check the inside where on the one side you will see a small wire surely would be covered on dust. By means of carburettor Cleaner give it a blast after you remove the "O" ring first.Give it a try.

Aug 20, 2012 | 1991 Toyota 4Runner

1 Answer

I have a 1996 V6 Camaro, and last year it started to kind of stall when i was driving but would quickly recover again. Basically it would **** to a stop and then keep going as if nothing was wrong. I...


I have same problem, I have 96 Camaro V6. Engine will miss at idle while stopped at light and seem ready to stall but won't stall. Also while driving engine will miss and seems transmission is slipping. My problems in these areas getting worse. Car has 44,000 miles. For what I paid for this car new ($16,000) I must say it has had many problems.

Apr 05, 2011 | 1996 Chevrolet Camaro

1 Answer

Shutting off


Here are some of the causes of surges, 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, 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

Apr 13, 2009 | Ford F-150 Cars & Trucks

2 Answers

Low idle stalls out


Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk 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 13, 2009 | 1989 Audi 200

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