sigh.. CEL

[mikefocke]

Link

Could be any of a half dozen things, probably an air leak.

[Topless]

Good flow chart with diagram Mike.

Probably not MAF related. If the problem occurred soon after a little invasive washing you may have gotten the pump or a relay wet and toasted a fuse. Real easy fix. Also check for loose or damaged wiring to the air injection pump. The "signal implausible" term is a weak German/English translation for "open circuit" or "no signal" from the sensor.

Good luck with your fix. Definitely not the end of the world.

[stateofidleness]

was kinda hopin' it was an MAF problem now lol.. seems like an easier fix.. the word "pump" makes me think $$$...

anything I can fairly easily self-diagnose (the fuse you mention) before taking it in tomorrow?

[stateofidleness]

so yesterday i made a quick run to the ice house after clearing the CEL to see if it would come back. when I started it, it BARELY started!!! what the... like OVERNIGHT my car went from fun as hell to omg i hope i don't break down...

so.. i drive it to work today and when i started it this morning, i see this big puff of white smoke! i know i know, but this isn't the normal white smoke, larger puff than normal, and it did the "sputter" thing like it was hunting for the right idle, then it normalized... still no CEL, idled ok i guess.

i've been reading a lot about the different possible causes and what all is involved with replacing certain items. im pretty sure i hear the "small hoover" sound at startup that is supposed to be the air pump, but one man's hoover is another man's "whirring" or "whining" so im not sure if it's the right noise..

How much would a new air changeover valve (exact name?), AOS, and electric changeover valve cost to replace? parts only.

also, i have read that the alternator needs to be removed for the air and electric c/o valve (ugh.. bad memories there) so how many hours of labor would replacing these 3 items take?

anything else I should have my mechanic check while he's in there?

[vath2001]

996-605-123-01-M244 Change-Over Valve for Air Injection, 993 Carrera 2/4 (1996-98), $23.50 Pelican parts

993-113-245-01-M100 Cut-Off Valve for Air Injection, 993 Carrera 2/4 (1996-98), Each, $104.75 Pelican parts


But your description sounds a lot worse.

[stateofidleness]

I have a 2000
anyone know the EXACT part I need (a link would be awesome, not particular about vendor, just price)

I think I'm going to tackle the AOS myself and see if that fixes some of it...

I would like the AOS itself (the revised version if it will work for my car)
and possibly the tubes or other parts I might find myself needing during the install.

2000 non-S, 52k miles, Tiptronic

Thanks!

[Topless]

Gentle suggestion,
Use the TS flow chart and pinpoint the failure first, then fix the problem. Changing the AOS or the MAF might be fun but it will not fix air injection pump issues. Did you check for a blown fuse? Your manual will show location and fused circuits ID. It really could be that simple.