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-   -   CIS mixture tool (http://forums.pelicanparts.com/porsche-911-technical-forum/437101-cis-mixture-tool.html)

john walker's workshop 10-23-2008 10:53 AM
read the last few of posts again. often as simple as a blown interior light fuse. the relay is the next likely suspect. when the FV isn't working, you go very lean. seems like that's what you have.

john walker's workshop 10-23-2008 10:55 AM
Quote:
Originally Posted by Shane Van Wey (Post 4256830)
Can you use that one with everything in it's normal place?
no.

SCWDP911 10-23-2008 11:51 AM
Quote:
Originally Posted by john walker's workshop (Post 4256877)
no.
Thanks... I thought it looked a little fat on top.

81white911 10-23-2008 12:02 PM
dome light
 
Hey the clock is running , does that count? As for the dome lights, maybe their just burned out.

Theres two small boxes down by the big box under the passenger seat.

One is 1" cube and is the relay i think. Can i check the voltage their?

The other is the size of a pack of cigarettes.

Can you adjust the mixture with that big rubber intake header in place>?

john walker's workshop 10-23-2008 12:18 PM
1" cube. if the interior light fuse is good you will have voltage in but maybe not out. check the 87 and 87b for voltage. if you don't get voltage there, you can make a jumper lead and simply give voltage to the 87 and 87b terminals in the relay plug. for test purposes.

boyt911sc 10-23-2008 03:17 PM
WUR with vacuum.......
 
Quote:
Originally Posted by T77911S (Post 4256570)
if your WUR has the vacuum enrichment, which i think it does, it could be that it is not working properly. it acts like an accelerator pump on a carb.
also check timing and make sure the advance is working.

do you have a pop off valve?

what led up to the car running bad? all of a sudden, recent work?
T77,

I believe that CIS (SC) engines with lambda sensor have WUR with no vacuum enrichment line. WUR's (-072 & -090) do not have vacuum enrichment which are OEM for these engines unless replaced by another type WUR.

Could someone say otherwise? Thanks.

Tony

Daviboy 10-23-2008 11:45 PM
Quote:
Originally Posted by john walker's workshop (Post 4256104)
so how do you get that one pictured into the hole with the engine in the car?
A bit of jiggery pokery and it goes just need to wiggle it in between the boot and the injector lines but it does go I have done it.

Daviboy 10-23-2008 11:47 PM
Quote:
Originally Posted by Shane Van Wey (Post 4256830)
Can you use that one with everything in it's normal place?
Shane yes it is a bit tricky getting it in the hole but it is possible

Daviboy 10-23-2008 11:53 PM
Here it is again pictured with the CIS back in the carhttp://forums.pelicanparts.com/uploa...1224834815.jpg

81white911 10-24-2008 12:34 AM
Todays plan
 
Relay is available about an hour south, so Im making the trip to buy it and hopefully fix the FV. And if that doesnt work ill start tracing the voltage.

The wur has a vacuum line on my 81 sc. The wur was removed, cleaned, i check the resistance 9.9 ohms, did the fuel pressure tests, all good, and replaced the wur vacuum line which i think had minor leaks, but didnt seem to make a big difference.

If they can find the enrichment tool I'll try that too.

Paulporsche 10-24-2008 04:23 AM
Tony, 81 White and T77911S,

The WURs for 80 and 81-83 don't have the vac enrichment. There is an atmosphere line @ the top.

Someone could still have one w/ vac as I do on my car, but you wouldn't use the lambda control then.


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