Question about Mitsubishi Pickup

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Engine idle speed wont come down under 1700rpm.i have fitted a new speed controller but same problem exists

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You are probably having an issue with your IACV idle air control valve located on your throttle body. When the IACV goes out you lose control of your idle. The car may not idle at all or you could find yourself driving down the road at 50 MPH without touching the gas pedal.

Posted on Dec 29, 2010

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No, no, no, no, and no. it is your tps. Transmission Positioning Sensor. It costs about 25 dollars, i guarentee it is your problem.

Posted on Jan 18, 2012

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Hi i just replaced the air intake elbow from throttle body to air flow brand n ew and still the car wont idle


Try this.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. 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 the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

Oct 26, 2012 | 1994 Mazda MX-6

1 Answer

My car is idling up and down


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 17, 2012 | 1994 Lexus GS 300

1 Answer

1998 1.4 PUMA RUNS FINE AND IDLES FINE REVS PROPERLY BUT THEN WONT IDLE ?


ngine 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

Jul 02, 2012 | Cars & Trucks

1 Answer

My car, an xjs 4lt, 1996 cele', it has a aj16 engine, the idle speed is too fast & will not reduce, i've checked the butterfly & that seems ok, i don't know whether or not the step...


Too fast an idle speed. If an engine without computerized idle speed control is idling too fast and refuses to come down to a normal idle speed despite your best efforts to back off the carburetor idle speed screw or air bypass adjustment screw (fuel injection), air is getting past the throttle somewhere. Common leak paths include the carburetor and throttle body gaskets, carburetor insulator spacers, intake manifold gaskets, and of course, any of the engine's vacuum fittings, hoses and accessories. It is even possible that leaky O-rings around the fuel injectors are allowing air to leak past the seals. Another overlooked item can be a worn throttle shaft and a defective idle speed speed control motor/valve stuck in the extended (high idle speed) position/throttle position sensor. Also the throttle plate could be binding in its bore and kinked accelerator cable, coolant temperature sensor might not be operating properly misleading the computer that the engine is still cold and computer throwing fuel at it raising the idle speed.----------

Getting this possibilities checked will help.Thanks.Helpmech.

Aug 31, 2011 | Jaguar XJS Cars & Trucks

1 Answer

How to adjust idle on ford falcon el 6 cylinder


wam the car up, disconnect the idle speed control valve wiring plug (idle control valve sits on top of the throttle body) then set the idle to 700rpm with the grub screw stop just above where the throttle cable fits to the throttle body. Reconnect theidle control valve and you're done. It may take a few k's driving for the ECU to relearn the new throttle stop position. The idle speed control valve is only used by the ECU to add idle speed when extra load is put onto the engine such as power steering or air con use, the base idle is set mechanically on the old falconns.

Oct 04, 2009 | 1983 Ford Fairmont

2 Answers

How to I set idle speed?


Before performing any on-vehicle adjustments to fuel or ignition systems, ensure engine mechanical condition is okay. CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Drive ability problems may exist until computer systems have completed a relearn cycle.
IDLE SPEED & MIXTURE
NOTE: Idle mixture is controlled by Powertrain Control Module (PCM). Adjustment is not possible. After replacement of Idle Air Control (IAC) valve, system must be cycled as identified for PCM to properly control idle speed. If idle speed is not okay after cycling system, problem is usually caused by a dirty throttle plate or vacuum leaks. Ensure all vacuum components are functioning properly.

IDLE SPEED (4-CYLINDER)
Turn ignition on with engine off for 10 seconds. Turn ignition off for 10 seconds. Start engine and idle for 30 seconds. Slowly vary engine speed between idle and 3500 RPM 5 times. Return engine to idle. PCM will now properly control idle speed. 2.2L (Cavalier & Sunfire) & 2.4L (Alero, Cavalier, Grand Am & Sunfire)  Good luck and hope this helps. If it still has the high idle problem, your going to have to buy a can  if not two cans ot THROTTLE BODY CLEANER NOT CARBURATOR CLEANER. Just follow the instruction on the can and try to get the Idle Air Control Valve cleaned also which is on the sdie of the throttle body so go to town when cleaning the throttle body and then do the Idle speed relearn again. The other thing to is since your doing house cleaning, buy a MAF sensor cleaner and spray down your MAF sensor and IAT sensor also, this will help with your fuell consumption. 

Good luck and keep me posted, be glad to help.

Jul 04, 2009 | Oldsmobile Alero Cars & Trucks

1 Answer

2000 kia sephia constant engine stalling!!!


try this procedure and let me know if it cures the problem.

Here is the common cause 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.

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2 Answers

High rev on stat up and stays lik that


Have you had it scanned for codes?

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2 Answers

1991 camaro bogs down


Adjust idle speed back down
Clean fuel filter and check fuel pump

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3 Answers

WONT STAY RUNNING


the idle speed sensor (throttle position sensor)may need to be replaced.

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