Results 1 to 5 of 5

Thread: Some CIS WUR Advice to share

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. 02-12-2022, 05:57 PM #1
    Jay Laifman
    Jay Laifman is offline
    Senior Member Jay Laifman's Avatar
    Join Date
    Mar 2009
    Posts
    660

    Some CIS WUR Advice to share

    I have a 73.5 T with CIS. I had a long run with bad WURs. My original 001 went bad. Then I got two allegedly good 129 WURs. But they didn't make the car run better. With the help of one of the CIS vendors, I got an 009 WUR (from the 1975 911 and 911S), with advice on how to hook it up. The advice I received was that the 009 had a vacuum port that enriched the injection better than the mechanical throttle position valve. So I put a T in the bottom of the deceleration valve to get vacuum to the WUR (on searching, it seems that is not a vacuum hose. That could be the problem all along. This just goes to show how hard it is to get good advice online!). And I unhooked the throttle position valve.

    The car was definitely better than it was with the bad 129s I got. But it was never exactly right. This last week, with some input from Brian Leask and Brian Bodart, I took off the vacuum to the 009. And WOW my car was as smooth as ever and wonderful again.

    I'm going to get the throttle position valve running again (and I have a separate thread on that to get that right).

    Maybe there is a way to get vacuum to the 009 and make it work better than with the throttle position valve. And I just got vacuum from the wrong spot. Or it simply is a bad idea for the 73.5. But, I thought I'd share in case anyone else goes down this road.
    Last edited by Jay Laifman; 02-12-2022 at 06:41 PM.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules


Message Board Disclaimer and Terms of Use
This is a public forum. Messages posted here can be viewed by the public. The Early 911S Registry is not responsible for messages posted in its online forums, and any message will express the views of the author and not the Early 911S Registry. Use of online forums shall constitute the agreement of the user not to post anything of religious or political content, false and defamatory, inaccurate, abusive, vulgar, hateful, harassing, obscene, profane, sexually oriented, threatening, invasive of a person's privacy, or otherwise to violate the law and the further agreement of the user to be solely responsible for and hold the Early 911S Registry harmless in the event of any claim based on their message. Any viewer who finds a message objectionable should contact us immediately by email. The Early 911S Registry has the ability to remove objectionable messages and we will make every effort to do so, within a reasonable time frame, if we determine that removal is necessary.