1999 Chevrolet Malibu evac air pump

Tiny
TALL PAUL UC
  • MEMBER
  • 1999 CHEVROLET MALIBU
  • 3.7L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
1999 Chevy malibu 4.3 cars has code p0410 run great most of time shows evap problem. Will be running good all at once it will bog down no power light get dim. Have checked pump and pumps put out air. Relay seems to work o k. Have noticed last few times it did the loss of power it had noise some what like a squel come from evap pump. Think the pump is going bad? Thanks for any help.
Tuesday, July 15th, 2014 AT 1:52 PM

4 Replies

Tiny
TALL PAUL UC
  • MEMBER
  • 45 POSTS
Sorry it is not 4.3 its a 3.1 v6 thanks
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Wednesday, July 16th, 2014 AT 6:51 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Just a heads up. I have found a few times where the pipe from the diverter (check valve) was clogged up with carbon as well as the exhaust manifold extremly clogged up and will set code. Just like an egr passage on these vehicles the exhaust manifolds and pipes will get restricted to where while testing it seems like a diverter valve is bad and not allowing enough air to pass by. On high milage vehicles make sure the exhaust passage is cleared. This has fixed a few P0410 codes for me.
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Wednesday, July 16th, 2014 AT 7:12 AM
Tiny
TALL PAUL UC
  • MEMBER
  • 45 POSTS
HMAC300 I AM GOING TO CHECK THE PIPES AND OTHER S FOR CLOG, AS TOU SAID TO DO. WOULD THAT MAKE ENGINE LOSE POWER AN LIGHTS AND AIR COND LOSE POWER? THERE WAS ALSO NOISE FROM THE PUMP FOR A FEW MINUTES WHEN IT LOST POWER. AFTER IT LOSES POWER FOR A FEW MINUTES IT RESUMES NORMAL POWER AND RUNS GOOD UNTIL NEXT TIME, THAT MIGHT BE HOURS. ANY THOUGHT ON THAT? THANKS.
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Wednesday, July 16th, 2014 AT 8:25 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
For losing power check the belt and tensioner replacement is recommended at 60 k for both also check battery for condition including load test that causes a lot of problems then scna for codes and check fuel pressure with a gauge auto parts rent it.
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Wednesday, July 16th, 2014 AT 10:03 AM

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