Question about 2003 Cadillac Deville

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No vacume to the erg

No air flow

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If it was anything like mine, take ur egr valve off and clean it out or buy a new one. Mine was xtra extra clogged

Posted on Mar 01, 2016

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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: -----

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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

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VACUUM DIAGRAMS For Audi A4?

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

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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

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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

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

Vacuum diagram for Isuzu?

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

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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.

Posted on Nov 27, 2012

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Posted on Jan 02, 2017

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1 Answer

Why does the mass air flow code comes back after replacing the sensor?


Mass Air Flow sensor just measures incoming air flow at a predetermined rpm/load. The computer is saying the flow measurement is not correct. This can be caused by mechanical faults within the engine like a bad valve seat or timing chain but would generally be accompanied by backfires through the intake. Usually its caused by a vacume leak between the sensor and the intake valve,like the intake manifold,loose intake pipe clamps, broken vacume lines,a leaking vacume brake booster [it will hiss loud when you apply the brake],bad spark plugs/wires, a clogged catalytic converter, stuck open egr valve or pcv valve,bad oxygen sensor or even a very clogged air filter. I know there is a lot listed but the MAF or MAP sensors show general flow through the engine that can be affected by several things. A vacume tester from your local auto parts store is about 30bucks and usually has instructions how to test for vac. leaks within the engine also to determine a if thers is bad valve seat or clogged exhaust.

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Need more information to help solve this problem.
You mean speed of air flow or direction of air flow?
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