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WUR questions

Peter S s/v Dawa II All Messages By This Member #42449 Keeping on with my CIS testing. ?I have a 79 with a 063 WUR. ?The WUR was rebuilt 6 years ago, and has 4,000 miles on it. I had assumed that the top vacuum port on the WUR was supposed to hold vacuum, and that the lower port was to be vented. ?In my case, the top port is connected to the right side of the TB, while the lower port is connected to the rear of the TB But the top port does not hold vacuum, while the lower one does. Also, I went to go check my control and system pressures. ?My kit came fitted with M12x1.5 inverted flare fittings. ?But the hard line on the WUR has 10x1 fittings, both in the body side and the flare side. Any idea where I could find an adapter? Cheers
Andrew Schauer All Messages By This Member #42450 I know nothing about the CIS system, but I bought a kit recently to test my L-jet fuel system. It appears to have the 10mm fittings you need? Good luck! Andrew 1980 928 5-speed
amidlman All Messages By This Member #42451 Rich responded but the message bounced, so here it is... check with Rich if you would be interested in a link to the bosch book.. cheers, Tom ? toggle quoted message Show quoted text From: Rich [mailto:rich9928@...] Sent: Thursday, June 27, 2024 11:50 AM To: '[email protected]' Subject: Re: WUR questions ? I have a 20 MByte PDF of the Bosch Technical Instruction book for K-Jetronic.? Email me at electronikrepair@... if you’d like a link to download it. ? This page may help answer your question.. ? Best regards, Rich
Michael All Messages By This Member #42452 开云体育 Let me know if you need a WUR. ? I have at least a dozen of them.? Also have the tester and BOSCH Books. ? I am in Burien. ? Michael ? ? ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of amidlman via groups.io Sent: Thursday, June 27, 2024 12:49 PM To: [email protected] Subject: Re: [PacNW928] WUR questions ? Rich responded but the message bounced, so here it is... check with Rich if you would be interested in a link to the bosch book.. cheers, Tom ? From: Rich [mailto:rich9928@...] Sent: Thursday, June 27, 2024 11:50 AM To: '[email protected]' Subject: Re: WUR questions ? I have a 20 MByte PDF of the Bosch Technical Instruction book for K-Jetronic.? Email me at electronikrepair@... if you’d like a link to download it. ? This page may help answer your question.. ? Best regards, Rich
Peter S s/v Dawa II All Messages By This Member #42455 Edited Michael, Would you have an 063? One of my big questions at the moment concerns the vacuum ports. ? i know they switched functions over the years, but I dont know which of my ports is supposed to hold vacuum, as opposed to being vented I did manage to find the temp vs pressure curve
cjensan928s All Messages By This Member #42456 开云体育 The lower port will lower pressure with vacuum and raise pressure with boost (forced induction) The upper port (near fuel lines) will raise pressure under vacuum, and lower pressure with boost.? Lower WUR pressure = richer. Higher WUR pressure = leaner.? You should have a vacuum diagram on the underside of your hood which will tell you which port should be connected to which.? However, under vacuum you want it to raise the pressure so when vacuum is removed it gets richer for better response. So top port is where the vacuum is likely to be. Lower port is unlikely to be used, but if it is, it would likely be connected to the same port for vacuum advance or to receive partial vacuum during accel. It won't be connected to manifold vacuum.? Cheers Colin J 604-807-4523? toggle quoted message Show quoted text -------- Original message -------- From: "Peter S s/v Dawa II via groups.io" <scottpeterd@...> Date: 2024-06-27 1:25?p.m. (GMT-08:00) To: [email protected] Subject: Re: [PacNW928] WUR questions Michael, Would you have an 063? One of my big questions at the moment concerns the vacuum ports. ? i know they switched functions over the years, but I dont know which of my ports is supposed to hold vacuum, as opposed to being vented
amidlman All Messages By This Member #42457 Edited Not sure why it cut off Rich's email.....here it is: Email Rich at electronikrepair@... and his web page:
Michael All Messages By This Member #42458 开云体育 I’ll take a look. ? Michael ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Peter S s/v Dawa II Sent: Thursday, June 27, 2024 1:26 PM To: [email protected] Subject: Re: [PacNW928] WUR questions ? Michael, Would you have an 063? One of my big questions at the moment concerns the vacuum ports. ? i know they switched functions over the years, but I dont know which of my ports is supposed to hold vacuum, as opposed to being vented
Michael All Messages By This Member #42459 Nothing that ends in 063.? Maybe look at cross reference parts. I used to run adapters and fuel lines from the car to a bench test.? That way I could test and calibrate them.? Used to sell them on Ebay. Michael toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of Peter S s/v Dawa II <scottpeterd@...> Sent: Thursday, June 27, 2024 1:26:45 PM To: [email protected] <[email protected]> Subject: Re: [PacNW928] WUR questions [Edited Message Follows] Michael, Would you have an 063? One of my big questions at the moment concerns the vacuum ports. ? i know they switched functions over the years, but I dont know which of my ports is supposed to hold vacuum, as opposed to being vented I did manage to find the temp vs pressure curve 1000006817.jpg
Michael All Messages By This Member #42460 开云体育 WUR Servicing ? Michael ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Peter S s/v Dawa II Sent: Thursday, June 27, 2024 1:26 PM To: [email protected] Subject: Re: [PacNW928] WUR questions ? [Edited Message Follows] Michael, Would you have an 063? One of my big questions at the moment concerns the vacuum ports. ? i know they switched functions over the years, but I dont know which of my ports is supposed to hold vacuum, as opposed to being vented I did manage to find the temp vs pressure curve wurservicing.pdf wurservicing.pdf
Peter S s/v Dawa II All Messages By This Member #42461 Edited Colin, Thanks for this. ?Not great news for me, as it means I have to rebuild mine. ?The top port will not hold vacuum. Cheers

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