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Join Date: Feb 2009
Posts: 107
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930 Air Pump Q
Does the air pump output air continuously?
I changed the air filter on the air pump (which looked original and like a block of clay) and subsequently checked the hose coming out of the pump for air flow and I've got no air coming out. There is a pulley on the back that turns and the belt is intact. Is this something I need to change if it is no longer pumping air? What would be the ramifications? The car passed smog just fine last year. Thanks guys! Mike
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1986 930 Turbo (Stock) 39k Huntington Beach, CA |
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05-25-2009, 03:02 PM
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Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 14,263
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I'm pretty sure it pumps all the time. I've seen where the air filter on an 911SC I had never seemed to get dirty as well. Maybe it just does pull much?
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05-25-2009, 06:25 PM
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The air pump should produce ABOUT 3-5 psi of pressure. It's a vane type pump and if not working, usually has locked-up or worn out vanes (blades). Many folks have ditched theirs so you can buy them cheap.
The engine control unit activates an electrical solenoid that switches a valve sending produced air either "upstream" to the exhaust pipes (just after exiting the combustion chamber) or "downstream" to the catalytic converter to afterburn remaining pollutants. If you want to help the environment, get a pump that produces air and make sure that your smog hoses, valves, and piping are functioning. Technically, with respect to smog laws, if you pass smog tests now, don't worry about it. If you fail smog for high carbon monoxide and/or high hydrocarbons, get an air pump that works and retest.
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Scott - 1987 930: 3.45L Supertec engine w/GT3 crank, California Motor Sports upgraded 930 trans, modified suspension, Zuffenhaus 9's and 11's, black on black..."The Black (Financial) Hole" 
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05-28-2009, 06:56 AM
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Thanks for the replies folks.. I was working on the car and noticed the belt was slipping. I tightened her up and it looks like its running now.
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1986 930 Turbo (Stock) 39k Huntington Beach, CA |
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05-28-2009, 07:29 AM
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Join Date: May 2005
Location: Loxahatchee, florida
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I have not had any issues with my air pump other than the space it takes up on the work bench as I havent thrown it in the trash yet.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's. 2019 Silverado 6.2L |
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05-28-2009, 08:51 PM
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newb.
Join Date: Feb 2001
Posts: 2,077
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LOL, me too. I'm going to sell mine to someone moving to CA. at some point.
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keith '75 RS/RSR-look | '73 CB750 | '70 TD250B r gruppe #436 |
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05-28-2009, 11:19 PM
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So I got the smog pump belt tightened up and now it's making noise.. sounds like a a low pitched bird or something.. happens for a while, then stops, then starts back up again.
Looks like I need a new pump.. part # is 930 113 114 01 if anyone happens to have one laying around. Thanks!
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1986 930 Turbo (Stock) 39k Huntington Beach, CA |
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05-29-2009, 04:43 PM
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