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Vacuum leak?

Tiny
EMT_LINZ7
  • MEMBER
  • 2003 FORD EXPEDITION
  • 138,000 MILES
2003 expedition, has had catalyst codes for awhile, as well as bank 1 and 2 too lean. Nasty smelling exhaust, jumps while idiling at drive through etc from 500-1000 rpms, gas mileage sucks. Also has humming noise from deep in engine compartment. Shop thinks they found vacuum leak and are replacing purge solenoid, want to make sure this is truely it and im not being taken for a ride, could this really be as simple as that. Thoughts?

been told by several shops need to replace engine, this guy says not the case, quite often mistaken for needing engine replacement
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Friday, March 2nd, 2012 AT 4:31 PM

8 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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, March 2nd, 2012 AT 4:39 PM
Tiny
EMT_LINZ7
  • MEMBER
  • 4 POSTS
So could changing out the purge solenoid be the fix?
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Friday, March 2nd, 2012 AT 4:45 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What are the exact code/s?
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Friday, March 2nd, 2012 AT 4:48 PM
Tiny
EMT_LINZ7
  • MEMBER
  • 4 POSTS
I dont remember numbers now, I think p0420 was for catalyst, not sure of the bank 1 too lean and 2 too lean codes
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Friday, March 2nd, 2012 AT 4:50 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have the catalytic converter and oxygen sensors-checked/tested
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Friday, March 2nd, 2012 AT 4:52 PM
Tiny
EMT_LINZ7
  • MEMBER
  • 4 POSTS
Yes, spent $85 getting those checked by exhaust shop. Said nothing wrong. Egr valve has been replaced, spark plugs, a vacuum line, 1 o2 sensor and 1 converter.
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Friday, March 2nd, 2012 AT 4:55 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the rest on my 1st suggestion and then comeback with results
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Friday, March 2nd, 2012 AT 4:58 PM
Tiny
RCFOOTE19
  • MEMBER
  • 3 POSTS
Were you able to find a solution, as I have similar problem and have tried same things and stalling still occurring.
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Thursday, April 19th, 2012 AT 3:08 AM

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