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12550313 big block throttle body engine

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2002 Buick Rendezvous CXL will idle very high & idle too low & stall when going slow or stopping.Replaced IAC valve. Service engine soon light not on, but service vehicle soon light always comes on.

Check for applicable trouble codes. Some of the national brand auto stores will check codes for free.

You may need to clean the throttle body and clean those small passages. With a high idle block off mouth of throttle body, should have a big effect on the idle? There are several issues that could cause idle to act up. Vacuum leak--maf and or map sensor. Don't replace anything unless testing points you in that direction.

Nov 18, 2015 | Buick Cars & Trucks

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On a dodge neon 2004 the code reads P0507 idle control system. Is that a sensor?

No, it's not a sensor. The engine computer controls idle speed by an "actuator" called an IAC -idle air control -motor or valve. It sits right on the throttle body where the air hose, the big boot, connects to the top of the engine. It controls the idle air passage-smaller air passages besides the larger throttle plate opening- according to computer command.
Probably your IAC motor or valve has a problem. A good cleaning often helps. Remove it and scrape off gently the deposits. Don't push the end piece, the pintle, back and forth, and don't spray cleaner up towards the little motor. Check the air passages where it mounts on the throttle body and clean as best you can. If it needed cleaning, take off the big boot and use a sensor safe cleaner, like throttle body cleaner, and old rags and old toothbrushes, and clean out the inside of the throttle body and the big butterfly valve, the throttle valve, inside. Note that when it is at rest, no gas pedal giving it gas, the throttle valve is almost completely closed. Those separate air passages in your idle control system, what the IAC motor controls, is the only way for the engine to get enough air to keep running. If they clog up, or the valve or motor doesn't work anymore, anyway the computer sees a wrong result from engine rpm sensors, and what it is commanding from the IAC motor, so it alerts you the problem is in the idle cntrl system. Have at it, friend. It's either do it yourself or pay labor costs for a pro.

May 05, 2015 | 2004 Dodge Neon

1 Answer

Where is the location of the throttle position sensor on a 2005 toyota camry?

It should be attached to the throttle body, same for the Idle air control. Follow the big air intake hose to the engine, it attaches to the throttle body intake housing.

Sep 03, 2014 | Cars & Trucks

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I cant find a throttle cable for '97 Chrysler

look for the throttle body, if you have an engine cover, take it off, look for the cable, the throttle body would be right after the air intake system which is off to the side of the engine. big black box with a thick black hose running to the throttle body which would have the cable attached.

Oct 20, 2012 | Cars & Trucks

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Throttle body location and replacement

the throttle body is located at the end of the cars intake pipe. I am not familiar with the layout of toyotas engines but all throttle bodies are at the end of the intake pipe. its a big roung pipe usually about 4 in thick. you might have to take out the engine cover if there is one present. the throttle body is usually grey or siver in color and you will know it when you see it.

Aug 11, 2012 | 2002 Toyota Camry

1 Answer

2002 GMC Envoy will start but dies after about 15 seconds

Starts for 15seconds then off? Sound like a big vacuum leak.Have someone start it and partially block the throttle body and search for that vacuum leak and repair it

Jun 08, 2012 | 2002 GMC Envoy

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2001 Galant won't stay on.

Looks like gum and carbon deposits have clogged some critical parts in the engine, such as injectors.
You would need to get to the 'throttle-body'.
1. Trace the big intake-air hose to where it ends on top of the engine. This is the throttle -body.
2. Loosen the clamp that's holding the big-intake air hose. Pull off the intake air hose from the throttle-body.
3. Spray some "Throttle Body & Carburettor cleaner into the throttle-body. You could use the entire can.
4. Wipe off excess gas from the throttle-body with a piece of rag.
5. Reconnect the intake air hose, and check if the
problem has disappeared.

Dec 16, 2009 | 2001 Mitsubishi Galant

1 Answer

Some time does not start and have to keep one foot on gas to get it started

Pull your intake hoses off the throttle bodies and check for carbon buildup in the throttle bodies and on the throttle plate.

Avalons (Toyota 3.0L engines in general) have a big issue with the throttle bodies needing regular cleaning. Excess buildup will starve the engine for air, requiring you to feather the throttle to get it idling when cold.

Prolonged conditions will lead to gumming up the idle motor and potentially damaging it.

Sep 10, 2009 | 2000 Toyota Avalon

1 Answer

Where is the trottle position senser located on my 1995 Ford F-250

The throttle position sensor is mounted on the throttle body.
Follow the big hoses from the air filter housing back to the engine and the first part on the engine you come to...... is the throttle body.

Buy the throttle position sensor first and match it to the part on the throttle body to identify the part you want to change.

Sep 01, 2009 | 1995 Ford F250

1 Answer


On the 6-cyl 3.4L, it's under the throttle body. Just follow the large hose from the top left side (driver's side) back to the engine.

Jun 21, 2008 | 1999 Pontiac Grand Am GT

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