Question about 2006 Chevrolet Cobalt LS

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Vacuum Leak I have a vacuum leak but cannot seem to locate the issue. It's definitely not the throttle body.

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  • Chevrolet Master
  • 1,250 Answers

With engine idle ...take a wd40 or equivalent
listen to engine sound if you spray on the leak then engine will change sound
or listen to small wisle

Posted on Oct 23, 2013

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Posted on Jan 02, 2017

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SOURCE: idle at 1500 to 2000 rpm

Most likely the throttle body gasket (between the throttle body and the intake manifold) is leaking.

Posted on Feb 12, 2009

  • 28 Answers

SOURCE: vacuum leak

plastic cover must come off to repair hose< hope you have a garage friend he will help you if not post it again i will ask my mechinic.

Posted on Feb 22, 2009

  • 1 Answer

SOURCE: vacuum leak

mine is doing the same, it's your pcv receptor on the manifold. that hard plastic cover is actually part of the intake itself, if it "came off" it would cut your intake in half. that seem seals the two halfs together. you gotta pull the whole intake off and replace it... or jimmy rig it.

Posted on May 16, 2009

toneman2121
  • 775 Answers

SOURCE: throttle body vacuum hose diagram

there should be one on the uderside of the hood oron the front rail as you open the hood

Posted on Mar 02, 2010

  • 4340 Answers

SOURCE: '06 chevy aveo vacuum leak at the intake manifold.

Proper resealing and problem resolution (warpage, etc.) cannot be done without removing and inspecting...
TPI sensors are problems on many cars, not a huge deal....

Posted on Sep 11, 2010

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2 Answers

No vacume to the erg


Vacuum line clogged or Vacuum controlling solenoid/motor issue.

There re few direct links showing exact vacuum line diagrams. I suggest you to refer the direct links.


Click the link below: -----

---------------

How to locate the vacuum leak?

http://howtobyme.blogspot.in/2012/01/how-to-locate-vacuum-leak.html

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Vacuum Hose Routing Diagram For 1995 Chevrolet Corvette Throttle Body?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-hose-routing-diagram-for-1995.html

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VACUUM DIAGRAMS For Audi A4?

http://repairhelpcenter.blogspot.com/2011/11/vacuum-diagrams-for-audi-a4.html

--------------------

VACUUM DIAGRAMS For VW Passat?

http://vwrepairhelp.blogspot.com/2011/11/vacuum-diagrams-for-vw-passt.html

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Vacuum line diagram For 1996 Chevrolet Lumina?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-line-diagram-for-1996-chevrolet.html

--------------

Vacuum Hose Routing Diagram For 1995 Chevrolet Corvette Throttle Body?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-hose-routing-diagram-for-1995.html

-------------

Vacuum diagram for Isuzu?

http://technoanswers.blogspot.com/2012/01/vacuum-diagram-for-isuzu.html

-------------

Ford 4 wheel drive vacuum solenoid working system?

http://technoanswers.blogspot.in/2012/02/ford-4-wheel-drive-vacuum-solenoid.html

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These will help.

Thanks.

Nov 27, 2012 | 2003 Cadillac Deville

1 Answer

R & R motor and where do the vacum lines


There re few direct links showing exact vacuum line diagrams.I suggest you to refer the direct links.

Click the link below:-----
---------------
How to locate the vacuum leak? http://howtobyme.blogspot.in/2012/01/how-to-locate-vacuum-leak.html

-----------------
Vacuum Hose Routing Diagram For 1995 Chevrolet Corvette Throttle Body?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-hose-routing-diagram-for-1995.html

------------


VACUUM DIAGRAMS For Audi A4?

http://repairhelpcenter.blogspot.com/2011/11/vacuum-diagrams-for-audi-a4.html

--------------------
VACUUM DIAGRAMS For VW Passat? http://vwrepairhelp.blogspot.com/2011/11/vacuum-diagrams-for-vw-passt.html
------------- Vacuum line diagram For 1996 Chevrolet Lumina? http://schematicsdiagram.blogspot.com/2011/12/vacuum-line-diagram-for-1996-chevrolet.html
-------------- Vacuum Hose Routing Diagram For 1995 Chevrolet Corvette Throttle Body? http://schematicsdiagram.blogspot.com/2011/12/vacuum-hose-routing-diagram-for-1995.html
------------- Vacuum diagram for Isuzu? http://technoanswers.blogspot.com/2012/01/vacuum-diagram-for-isuzu.html


-------------
Ford 4 wheel drive vacuum solenoid working system? http://technoanswers.blogspot.in/2012/02/ford-4-wheel-drive-vacuum-solenoid.html

------------
These will help.
Thanks.

Nov 26, 2012 | Cars & Trucks

1 Answer

Vacuum leak below throttle body


these engine have a problem with the pcv valve vacuum tubes splitting and causing a vacuum leak, will need for part number and go to dealer to buy replacement hose

Sep 03, 2012 | 2002 Mercury Sable

1 Answer

Small vacuum leak showed up on auto parts machine. need a vacuum diagram. best way to locate the leak. we tried with a special doctors hearing device but did not hear nothing


The easiest & quickest way I have found a vacuum leak and I am in the business is to get a can of carb cleaner. When the engine is running start spraying along all your vacuum lines and connections. Also along the throttle body or carberator and around the intake manifold. As you're spraying if the lidle of the engine changes then you have found the general area of the vacuum leak. From there on you can begin to narrow down the location until you find the source of it. I hope this helps and good luck.

Aug 06, 2011 | Dodge Ram 1500 Cars & Trucks

1 Answer

Car starts hard runs good on highway stalls if i dont keep my foot on gas have to push gaspeddl to floor to start replaced plugs wires also idle control in throtal body


So IAC has been replaced. Sounds like a dirty throttle body, EGR valve, or vacuum leak. DId you do the maintenance yourself. If so then you should be able to inspect Throttle Body to determine if black and dirty.. this can cause intake problems leading to your issue adn rough idle. EGR valve sends exhaust gas back into combustion chamber to reburn it and make car more environmentally sound. If stuck open it can allow too much exhaust into combustion chamber causign a lean mixture, too much air can cause this.. Vacuum leak can also allow too much air in. Start with easiest and check Throttle body, then EGR valve, finally for vacuum leaks. Depending on your skill the EGR can be cleaned as can the throttle body.. a good link for TB cleaning is http://www.popularmechanics.com/cars/how-to/repair/1272341. A vacuum leak may be harder to diagnose. You are compensating by depressing gas pedal telling ECM to send more fuel to motor to overcome this issue thats why it will run and start with gas pedal pressed.

Jun 08, 2010 | 1998 Saturn SL

2 Answers

Truck idles at 1500rpm 5.0engin


idle air control valve issue, timing is advanced too far, or your throttle needs adjusted at the throttle body going into the intake where your throttle cable connects to throttle body.

Aug 01, 2009 | 1991 Ford F150

1 Answer

1991 S10 2.5L throttle body idles to fast


A vehicle that old will suffer from brittle and cracked vacuum lines. I would say there is a bad, or several bad lines leaking away vacuum from the intake manifold. Don't forget to check the hose going to the PCV on the valve cover. A vacuum leak will also cause the engine to stumble and miss intermittently when idling.

Jun 26, 2009 | 1991 Chevrolet S-10

3 Answers

Idles at various rpms


thottle position sensor out of adjustment or bad

Jun 24, 2009 | 2003 Jeep Wrangler

1 Answer

1992 GMC Jimmy idles rfast


if this is a throttle body motor which probably is check for vacuum leak were the throttle body bolts on to the intake .the gaskets go bad after awhile .or listen to here a hissing sound try to locate and you might find a vacuum leak there.

Mar 18, 2009 | 1992 GMC Jimmy

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