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What is this called it looks like some sort of

What is this called it looks like some sort of vaccume wen the throttle is open it should move up and down but it doesnt

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Remove the vacuum hose to it & use a hand held vacuum
pump to test it.

We'll just keep wondering what vehicle that is !

Posted on Mar 27, 2014

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I get a whistling noise i think is coming from throttle body

Your whistling is quite possibly a vacuumn hose leak on the passenger's side, top of the engine. Look closely at the hose connections coming from the PCV. Small holes can develop in these vacuum line connections, and you will experience a rough idle, as well as the "whistling" noises.

Jul 06, 2014 | 1999 Ford Explorer

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Diagram distributor

Wide open as in wide open throttle?? You mean the engine is racing? Something is wrong with the throttle controls, or the throttle valve in the carburetor may be sticking open. Look down the carb throat. At its base will be the throttle valves-"butterfly" valves just like the choke valve on top of carb. The throttle valve should be closed at rest, or at idle, or when gas pedal is not moved. Rotate the throttle lever on the carburetor by hand (when gas pedal is pressed down, the throttle is rotated). The throttle valve at the bottom of the carb should open and close with the throttle lever.
If the valve is sticking, spray some carburetor cleaner down it, and spray the outside clean, too. Work the throttle back and forth to make sure it is free to move.
For a high idle, have the carburetor adjusted. Timing should be checked, too-that can cause a high idle, but wouldn't cause it to go wide open.
Let us know what you find. Good luck.

Dec 07, 2013 | Ford Ranger Cars & Trucks

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If you know for a fact you have no vac leaks, the next step would be to check the idle air control valve. It should be mounted in the throttle body. It could be stuck open.
The computer controls idle speed by regulating air flow into the throttle body.
The throttle plate could also be stuck open. An eighth of an inch would do it. Make sure the throttle and cruise control cables are not pulling on the throttle plate.
Vac leaks could include the PCV valve and the EGR valve.

Jan 12, 2013 | 1995 Buick Regal

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My 2001 Aurora Idles low. It kind of spudders and pulls a bit as if the engine wants to cut out. It actually Idles around 600 RPMs, very sluggish like not getting fuel or something. Also after a long...

Sounds like a vaccum problem, do you mean lean condition and I don't know what your talking about "piston sensor" there is no such thing, give me the engine code #
Open the hood and listen for a hissing sound, now move your hand over the area where you think the hissing is coming from, slowly feel around vaccum lines, don't get to close to moving parts, if nothing found, shut down thw engine and remove the intake hose to the throttle body (looks like a small carborator,) it will look like a round metal circle, in that section spray carborator cleaner into the IAC (idle air control, it's a small mechined cut out onside the throttle body) the car might be a little hard to start at first, please send me the engine codes.

Apr 05, 2011 | 2000 Oldsmobile Intrigue

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On an 1980 cheve truck with 350 4bbl does the vaccume go to steady vaccume or only vaccume when on throttle

You will have more vacuum at idle than you will when you accelerate. In the old days when cars had vacuum operated windshield wipers, the wipers worked good when idling, but when you gave throttle they would slow down or stop completely. Just an example of the difference in vacuum between idle and throttle.

Jan 24, 2011 | GMC Sierra 1500 Cars & Trucks

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When you start the car it revs up and down by itself

it may be possable that the throttle bogy is backed up with carbon around the throttle plate.

take the air intake tube off the throttle body.

open and close the throttle plate.

you will see black carbon buildup around the plate.
use a can of carb cleaner to shoot the carbon off the plate and all around the plate.

if that dosent do it
then listen for a vaccum leak somewere.
or maybe a vaccum hase has come off.

let me know if this helps

thank you much

Mar 17, 2010 | 2003 Chevrolet Impala

1 Answer

Tbi flooding with gas,fuel pressure regulator replaced,fuel pump replaced,ran good in yard,took on 8 mile trip,truck stalled gas coming out of tbi like water boiling in a pot! maybe map sensor since it...

From your description it sounds like your ECU is believing you are at Wide Open Throttle (WOT) when conditions are to the contrary.

MAP sensor is a good place to start, but their failure rate is seldom, Id be more apt to look at the Throttle Position Sensor (TPS), and while you are at it take a look at the throttle stop and AIS motor/sensor too.

When you open and close the throttle from the throttle body is there hesitation, does it open/close all the way, etc? If you answered "yes" to any of those, look at your throttle stop and kick down (if automatic)

I'd Check the injector too while I'm at it. Does it pulse constantly? There may be a ground issue. or a problem with the ECU.

Another place to look: On the smaller engines with TBIs the male connector cable likes to rock in out of the receptacle. make sure it's tight.

Hope this helps

Feb 16, 2010 | 1988 Dodge Dakota

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1997 ford f150 just had egr valve replaced.. engine is hesitant and check engine light is on with error code 401.. whats the prob?

Everyone says to test out your DPFE sensor. This controls the flow of the egr. When the codes pull up, everyone thinks its the egr, but really its this little guy.
Take it by a shop and see if they can mess with the bugger. They usually run about $50+.

Feb 04, 2010 | 1997 Ford F150 Regular Cab

1 Answer

Running rough


could be the idle air control solenoid , its right below the throttle position sensor(opposite where you can open the throttle with your hand) on the 3.3v6, when that goes it does all sorts of stuff, bottom line its going to have to be put on a dyno to see what it is but you can take that part off and get one at the junkyard we got a whole throttle body for 10.00. Try also to disconnect the electrical connector off the idle air control solenoid and see if runs any differently, then youll know right away

J Meredith

Jun 20, 2008 | 1992 Plymouth Grand Voyager

1 Answer

Ford LTDwith 400m cuts out?

fuel filter or fuel pump problem or it could be the automatic choke is closed and choking motor make sure choke is plugged in on side of carb start car let it warm up with air breather off watch and see if choke opens up .also you can look down into carb when motoe running crack open throttle and see if it sprays gas into intake if it doesnt could be filter or pump. to check fuel pump remove fuel line from carb insert line into small can or bottle so fuel doesnt run ontop of motor and have someone just bump over starter and see if it pushes fuel out line with a descent amount of pressure check fuel filter.and if all that checks out try looking for vaccum line off to check get a can of either and squirt lightly around vaccum lines and listen for car to idle up if it does bad vaccum line. and also check distributer. but it sounds like it is getting to much gas so i would check choke first..... hope that helps .. and by the way you have a 351 modified 400 wich is 351 m 400.

May 18, 2008 | 1992 Ford LTD

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