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Car Dies out immediatly when I let off gas

My car will start up but i have to keep my foot on the gas or it dies right out. but this happens only when the car is sitting when u actually get it moving it runs but is still ruff. I was thinking that the IAC motor might be fried or the valve might be stuck but im not anywhere near an expert just a weekend mechanic so if u could give a little insight that would be great thanks

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  • mhorist Apr 30, 2009

    I have a 2002 Volvo S80.

    Yesterday I was merging onto the highway, had the pedal down because traffic was heavy. Suddenly the car stalled. I pulled off to the shoulder and it started right back up however; now whenever I let off the gas it stalls.

    I have a recall letter for a fuel pump issue. Could this be what broke?

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: car starts and runs fine then dies

ya could be a bad filter. or maybe your injectors are getting bad.

Posted on Mar 18, 2009

  • 1 Answer

SOURCE: RX300 Engine Stalls when I take foot off the gas pedal.

The Idle Air Control (IAC) valve is clogged. This part feeds air to the engine at start-up and idle when the throttle bodies are closed. I removed the throttle body assembly from my 2001 RX300 and separated it from the IAC. After a good cleaning with throttle body cleaner the IAC was good as new. I later decided to replace it during routine maintenance. You can pick up a brand new IAC on eBay (genuine Lexus/Toyota part). The dealer will want upwards of $400.00 for a 45 minute job (all you need are basis hand tools).

Posted on Mar 23, 2009

  • 43 Answers

SOURCE: 2000 Camry Starts but dies down right away

Hello

I just worked on this problem a couple of days ago. If the motor is a 3.0 liter. The idle control valve is located at the bottom of the throttlebody assembly right below the bore for the throttle butterflies..What usually causes this valve to go bad is the mechanical part of the sensor sticks as it becomes sludged or carboned up. Manufacturer claims that the valve cannot be cleaned and should only be replaced....It's a high dollar repair to replace this sensor as your engine coolant flows through this electrical valve. The valve idles the car fast when cold, as the antifreeze gets hot the valve drops the idle down.....I have successfully cleaned several of these valves and cured the dying problems...
First remove the air filter top cover and the tubes that connect to the throttlebody. In the right throttlebody you will see a port right before the butterfly. Under the throttlebody you have a black plastic sensor with a 2 wire terminal. Remove the 2 phillps screws and pull off the electrical part of the valve. you will feel a magnetic pull while removing. Remove slowly and catch the black sealing oring, and there will be a metal washer also.. The shaft that is exposed is the mechanical control of the valve. Rotate the shaft and it should feel sticky if bad..Using a throttlebody spray cleaner spray into the small square port of the right bore, rotate shaft and spray until stickfree.....Reassemble

Posted on Apr 05, 2009

  • 23 Answers

SOURCE: car dies immediately after starting

SOUNDS LIKE IDLE AIR CONTROL VALVE,YOU WILL PROBALBLY NEED A COMPUTER ILDE RELEAN FLASH,IT RESETS VALVE OR IF THAT DOESN'T FIX POSSIBLY AN AIR FLOW METER AND A ECM UPDATE,HOPEFULLY YOU KNOW A TECH DEALER GOOD LUCK

Posted on May 17, 2009

Molson02536
  • 3854 Answers

SOURCE: jeep will not start unless you give it gas

It sounds like the idle air control valve (IAC) may be stuck with carbon build up. You can ether remove the IAC, or if your lazy like i am, buy two cans of Throttle body cleaner. Just follow the instruction on the can and pay attention to the IAC, try to spray the Throttle body cleaner hose towards the IAC. DO NOT USE CARB CLEANER, it's too corrosive to the gaskets used on throttle body's. If your going to remove the IACThe idle air control valve is located on the back of the throttle body. It has an oval electrical connector and two torx screws holding it in. Unplug the connector, remove the two screws then lightly tap the body with a soft faced mallet to loosen it from the body. Once you have it out and prior to installing a new valve clean the seat inside the throttle body where the idle control fits. This must be very clean! Installation is in the reverse order. Btw, to save some cash, pull the valve out and clean it, this usually fixes the problem for quite a while. Look for crushed / cut, just any signs of damage to the wire harness to your IAC. After you have cleaned the IAC and still have the problem, you may have a bad IAC and needs to be replaced. Good luck and hope this helps. 

Posted on Jun 21, 2009

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