Does anyone know if the air injection pump can be repaired? I've checked that 12 volts is present at the connector but pump does not run. Thanks for any suggestions.
The failure mode is usually the cheap armature bushings go bad and increase load on the motor until it burns up. And then sometimes they just ingest water until they die. May not be much left to fix. They are really throw away quality.
Do you have a part number for the SPAL air pump? Also, it looks quite awkward to re and re - so any tips to make the job easier? THX
mine failed by somehow welding the impeller to the housing - seems like some bearings got too loose allowing it to slide around. I couldn't find a good lower cost replacement (360 is too big) and ended up finding a used 355 pump that works great.
Here's a used one, not sure if it is correct for a 1995 car, check the part number. http://cgi.ebay.com/ebaymotors/Ferrari-355-Electric-Air-Pump_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el1262QQcategoryZ33546QQihZ002QQitemZ120115047934QQtcZphoto Low ball him at least 60% lower than the asking price... I would also try tearing yours apart and see if there is anything in it you can fix...nothing to lose at this point.
Like brian said, "Nope". It is for cold start emissions. It introduces air to the exhaust ports of the cold engine to help burn off excess HC until the engine reaches a prescribed temp, then it shuts off. I could see how some could be confused as the hard vacume line for the by-pass valve is welded to the hard air line for the air injection, making them appear to be related.
Good question, I would be curious of that too Also would our exhaust manifolds last longer if we didn't let the air pump heat them up at start up?
Every mid-sized and large town has a magneto shop that can cheaply fix *any* electric motor that is even remotely repairable...and the same shops can rig a replacement motor otherwise.
You repeat these points, often. I would like to see you PROVE it. Take Coscom's air pump, and get it repaired for him. Having seen how these are built, and in Uconn's post how it failed, and based on Rifledriver's comments to the point, they really appear "disposable" in their construction. The design does not appear to lend itself to an easy cross reference either. So, please prove me wrong.
It is created when ever the throttle is closed with the engine running. There are two small plastic check valves aft of the left and right thottle stacks, they both lead to a coffee can sized vacuum reservoire. The vacuum is then allowed to open the exhaust bypass valve and plastic start up diaphram by way of two ECU actuated soleniod switches.
It's not controversial. Here's your picture of the 355 air pump, marked up to show how a magneto shop is going to view it. They aren't going to care if it goes on a Ferrari, boat, or tractor. They are going to unbolt the little electric motor. Either it can be rebuilt (e.g. new armature/brushes/bearings/etc.) or else it can be replaced. Probably the worst failure from their viewpoint would be an impellor that was jammed/welded into its assembly...and even then, they will either be able to repair or replace it in most cases. This is what magneto shops do. All day long. They fix failed electric motors/assemblies. Image Unavailable, Please Login
Go ahead, take it apart and look at what you've got. You'll probably end up throwing it in the trash.
I appreciate any DIY tips, but like anything you need to apply it to your situation. In my case, the impeller was welded SOLID. I had to pry it apart, both the housing and impeller were toast. If the impeller is good and it's motor only, absolutely go for a rebuild. I think a new one was $750+??
Hmmm, so I wonder if I could rig a switch under the dash to trigger the exhaust bypass valve solenoid manually (with some sort of protection circuit or diode to protect the ECU output of course). Then I could override the ECU control to have the bypass valve engaged at all RPMS whenever I wanted, then have it run normally again at a flick of a switch. I saw this feature on a Lambo once. Maybe I'll look into it some and start a new thread.