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My engine has a check engine light and possible.

Tiny
JXG522
  • MEMBER
  • 2003 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 11,000 MILES
My engine has a check engine light and possible a vacuum leak, how do I fix it?
Friday, January 7th, 2011 AT 8:13 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis, finding out what's going on.

Get back with the code/s-Vacuum leak?

Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.
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Friday, January 7th, 2011 AT 8:15 PM
Tiny
HEINRICH101
  • MEMBER
  • 3 POSTS
Ways to look for vacuum leak:
1. On this particular car/suv, it does not have too many vacuum lines, but make sure they are all disconnected and seal, (meaning to can disconnect them and seal with rubber caps)
2. The intake manifold is made of plastic, they are known to leak from there
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Wednesday, January 12th, 2011 AT 5:59 AM

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