My air pump sounds like a turbine jet engine and is running whenever it feels like but I am not getting any codes so the dealer said just let it go until it fails. Well to me it is failed whether it has set a code or not so I want to replace it. Besides it's embarrassign when everyone in the parking lot looks over at me thinking a jet is flying low in the lot. I found instructions on Volvospeed/Bay13 and I am going to attempt this myself. My question is this. Since my pump fails every 12-18 months anyways and the dealer has already replaced all the other parts twice in the last 4 years, i'm thinking of just doing the pump. What the heck, it's gonna fail again in 12 months and I need to save the money for a zillion other things that need work on this car (like the leaky rear seal and the A/C and the smelly exhaust. Hey, that's not too bad after 295k !!!!

Marty

It's a straight forward job to swap the pump although it ain't cheap. The problem is a design flaw (water runs downhill) in the system in that condensation forms in the line, runs down and fills the pump with water shorting it out. You need to drill two 1/8" holes in the lowest point of the pump that will drain it. Doing this first before replacing the pump may solve your problem. There is also a round SAS valve up on the firewall that is part of the system that may be bad. A lota guys recommend changing it at the same time although it runs about $80. if I recall correctly. The other things that fail in the system are the relay (unlikely) which is right beside the pump and a small vac selonoid on the inside of the radiator shroud with purple and white lines running to it. My guess though is your pump is full of water.

bl

Thanks for the reply. I am gettign tired of having the dealer replace this thing so I'm gonna tackel it myself this time. I am not replacing the other parts since the dealer did them 18 months ago and it does not seem to matter because I replace this pump every 12-18 onths anyways.

Marty

i have similar prob. obd code 0410. haynes book doesnt help. where can i find instructions, diagrams etc.

No sense in having the dealer rip you off again as it's not much of a job. Batt has to come out as I recall and if they used those special crimp clamps just cut them with nippers and use regular hose clamps if you don't have the special tool to apply them. I found an almost new pump on ebay for ~ $125. which was a steal. I've seen others on there from time to time much less than a new one. I think even FCPGroton gets near $300. for a new one. Good luck!

bruce

PS Before you write it off completely, you may want to try unplugging the pump from the relay (blue wire I think) and apply 12v to it via a jumper wire. That will make it run w/o the engine noise and maybe you can find some other cause for all the noise. Just seems odd the dang thing has failed again so soon.