Need More CIS Help, Please

[HarryD]

Paul,

Congrats for getting yourself squared away. As in most things in life, attention to all of the details helps.

In the future, keep this truism in mind:

There are 3 types of CIS Owners:
1) The guys with working CIS systems are probably out driving their cars so they won't reply promptly but do when they finally get home and see a fellow in need.
2) The guys that tinker with their CIS systems and have them royally screwed up will keep you running in circles with suggestions.
3) The guys that have spent a fortune on Webers will tell you they're great to justify their expenditure to themselves.

Now that you are part of the #1 type owner, hopefully you will be with us a long time.

[Wyvern]

Good for you Paul...

You and I were having issues at the same time and I did keep a close eye on your progress and the advice given.

I am also on the road... you didn't mention the timing specs that you were at .

I advanced mine and set at 6K RPM @ 35*
WOW at first I was happy to be running ... with the timing set it is a different beast.
Having my O2 set tomorrow ... I will be interested to see where my seat of the pants tuning actually is.

With the CIS set and running well ...The other projects can BRING IT ON ... I have polished fan. refinished my wheels . and today fixed my fuel level sender .

What will you be doing now that your on the road ?


Like you ... SO appreciative of the input, knowledge, and encouragement of the members of Pelican Forum ...

[Gunter]

Originally Posted by boyt911sc

Paul,

Nice to hear that your car is back running again. But you did not mention anything about your control and system pressures. Could you share this information to the rest of the readers? Thanks.

Tony

No, no, no. Let him drive and enjoy. LOL.

[Paulporsche]

Thanks, guys. I intend to do a lot more driving and a lot less tinkering for a while!

Tony,

We're on the upswing re temps now, so ccps aren't so critical. The book even says to do ccp tests @ lower than 20C. I want to see where I am @ the lower ends of my typical usage, which would be about 0C. When things eventually cool off, I'll run another check to see where they are. Then I'll post everything just to get it all in the database. I have thr AF/R testing still to do.

Im still trying to gather more info on my engine, which is something Gunter suggested. When I get it I'll post that too.

Harry,

Yes. It takes all kinds. Although I feel everyone who contributed here did so w/ the best of intentions.

Although not exactly the methodology espoused by some knowledgable guys here, I feel for me some of the "going around in circles" I inflicted on myself was still worthwhile. I wanted, in particular, to greater understand the workings of the system, especially the WUR, via observation. And since I had 4 to play with, I wanted to observe them all.

Brian,

Good luck w/ your car. I have been told that I'm @ 32 total advance, but I haven't set it myself. I just may take the car to the Boston area this summer if I can get away.


The one aspect of all this that makes me feel the best is that I, w/ a LOT of help from everyone here, was able to do what 3 pros, w/ a combined approx 100 years working on these cars, were unable to do, which is to get this car running as it should. That's the beauty of this site!

[Porsche_monkey]

It would also be useful to post the techniques you used to adjust the pressures....they are not well documented on this site to the best of my knowledge.

[HarryD]

Originally Posted by Paulporsche

Thanks, guys. I intend to do a lot more driving and a lot less tinkering for a while!

...snip...

Harry,

Yes. It takes all kinds. Although I feel everyone who contributed here did so w/ the best of intentions.

Although not exactly the methodology espoused by some knowledgable guys here, I feel for me some of the "going around in circles" I inflicted on myself was still worthwhile. I wanted, in particular, to greater understand the workings of the system, especially the WUR, via observation. And since I had 4 to play with, I wanted to observe them all.
... snip ...

The one aspect of all this that makes me feel the best is that I, w/ a LOT of help from everyone here, was able to do what 3 pros, w/ a combined approx 100 years working on these cars, were unable to do, which is to get this car running as it should. That's the beauty of this site!

Paul,

First, I was quite pleased to follow your progress and problems and your willingness to work through them. Anyone one reading this thread will learn much about how CIS works and what the parts that make it up the system do.

Sadly, there is no true Check-Measure-Adjust (i.e. CMA) manual for CIS like the MFI guys have that has the effect of forcing them to slow down and find the problem before they "fix" something".

Go out and enjoy your car. The more you run your CIS, the happier it will become as the parts wear in together.

Happy motoring!

[Jim Williams]

Originally Posted by HarryD

Paul,


Sadly, there is no true Check-Measure-Adjust (i.e. CMA) manual for CIS like the MFI guys have that has the effect of forcing them to slow down and find the problem before they "fix" something".

Harry,

There is a similar book on CIS, although it doesn't have the CMA name. It is (was) called CIS Troubleshooting Guide. The existence of the Troubleshooting Guide (a Porsche booklet) is not widely known, and is out of print. Here is a photo (the scanner cropped part of the image):



It has about 70 pages, laid out in a flow diagram format, of things to check. It was published in around 1976, but still covers all the basics.

[ossiblue]

Originally Posted by Jim Williams

Harry,

There is a similar book on CIS, although it doesn't have the CMA name. It is (was) called CIS Troubleshooting Guide. The existence of the Troubleshooting Guide (a Porsche booklet) is not widely known, and is out of print. Here is a photo (the scanner cropped part of the image):



It has about 70 pages, laid out in a flow diagram format, of things to check. It was published in around 1976, but still covers all the basics.

Yep, got the same booklet with the purchase of my 73.5--didn't know it even existed until I got the car and opened the glove box. A great little helper, indeed!

[Paulporsche]

I have that book. It came w/ my car when I bought it 20 yrs ago. I mentioned the mechanics who couldn't get the car running right--well, 2 of the 3 photocopied the book! The 3rd is retiring.

Thanks for the comment Harry. I know I worked @ a pace too slow for some, but, as I mentioned, about 90% of the total time was "downtime". My hope was the same as you mentioned, that at least someone out there would benefit besides me.

[HarryD]

Originally Posted by Jim Williams

Harry,

There is a similar book on CIS, although it doesn't have the CMA name. It is (was) called CIS Troubleshooting Guide. The existence of the Troubleshooting Guide (a Porsche booklet) is not widely known, and is out of print. Here is a photo (the scanner cropped part of the image):



It has about 70 pages, laid out in a flow diagram format, of things to check. It was published in around 1976, but still covers all the basics.

Great.... How does one get a copy then? Me thinks it would be a nice addition to my library.

[Paulporsche]

Check your PMs.