Hello everyone,

The 142E we are developing for SCCA racing has a bad idle air valve (auxiliary idle controller, or whatever else people call them). The correct part for our car (Bosch p/n 0 280 140 013) is the one without the electrical heater in it, and seems to be pretty much unobtainable new or used.

There is a later version (Bosch p/n 0 280 140 104) that uses an electrical heater instead of heat from the coolant to warm itself up and close. I believe it was used on early 240s that had the B20 engine. However, if we can establish that this version was ever used by Volvo on a factory Volvo 142 with a B20 engine, then we would be allowed to use it on our car without breaking SCCA class rules.

So - does anybody know if the later version was used on a 142? Or can anyone sell us a working version of the non-electrical valve?

You can see pictures of both valves on the blog for our 142 race car at http://volvo142racer.blogspot.com/

Thanks,
Nick Craft

BMW used Bosch Motronic fuel injection system. I believe that the late 70's model used the coolant heated auxilliary air valves.

The east coast BMW guru for parts is a tremendous guy in Georgia, Steve Haygood.
You can contact Steve at:



http://www.stevehaygood.com/

If the part is the same for both the Volvo and BMW manifolds and is still available, then this might work out for you.

Joe M in WV

Since it is stuck open, Wotan was with you. Get one of the electrical ones you mentioned and plumb it into the hose going back into the manifold aft of the butterfly. When you scavenge the electrical valve, get the plug and a chunk of the harness with it and connect black to ground and blue to the last terminal closest to the engine on the relay closest to the fire wall on the passenger side. You can also go the fancy way (like George D. did, I think) by putting a cover plate over the hole in the head and attaching the valve to that. I'll post a picture of my installation later on. It always takes me awhile to get my pix down to the right size for the Gallery. :-(
Bob S.

PS: Still time to add the pictures.
Electrical Auxiliary Air Valve
EAAV Wiring

Bob,

What you suggest will obviously work, but would be illegal on an IT car. Actually, it's worse than just being illegal... it is illegal and highly visible! ;)

Gary L
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1971 142E ITB racer, 1973 1800ES, 2002 S60 T5

Right you are. I should have read the question more carefully :-( Maybe, with a bit of luck, someone else will get some use out of the info.
Bob S.

Do you need one at all? All it does is make the idle a little faster on a cold engine, is a 'hands free' idle for the first minute or two on a cold day a requirement?
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I'm JohnMc, and I approved this message.

Yes, good point, we could easily live without it. Unfortunately its failure mode is to stick open, so we'd need to block its hose off somehow, which may or may not be SCCA-legal, strictly speaking. There are people getting away with much worse infringements that that though. We'll probably end up doing that as a last resort, I'd just like to have the thing working if possible.

"There are people getting away with much worse infringements that that though."

I'd be willing to bet that most of the ITB 142E's running around out there are doing it with non-functional IAC's. I know of at least one. ;)

BTW, I did see something in your Blog that caught my eye. I'll send a you an email on the subject.

Gary
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1971 142E ITB racer, 1973 1800ES, 2002 S60 T5

Yes, we run with the stock steering box. We have an up-front boilerplate rule in the ITCS that essentially states... "If it doesn't say 'yes', it means 'no'". Since the steering box is not mentioned anywhere in the allowable modifications, it must remain stock.

Gotta ask... why do you ask? :)

Gary L
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1971 142E ITB racer, 1973 1800ES, 2002 S60 T5

I figured it was a no.

As per why I asked.. the ratio is rather slow. I know there isn't an easy solution to it. Does it bother you at all? Or does it just seem slow because the steering goes farther from lock to lock than most cars? I've driven 140s at 100+ mph, but always in a straight line.. so have no idea as to how it feels taking turns at good speed.

I must admit I've never thought about it, so I guess the answer would be... "No, it isn't bothersome." At Hallett for instance, there is only one turn each lap that requires a lot of steering wheel input (the only 2nd gear turn on the course). The rest of the turns are in the 55 to 80 mph range; you're not exactly "twirling" the wheel in turns with those sorts of radii!

Gary L
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1971 142E ITB racer, 1973 1800ES, 2002 S60 T5