Well, after a week of Fuel pressure testing and getting my feet wet on the 1981sc Lambda CIS system, I find myself wanting to verify that my Lambda system - from 02 sensor to ECU to FV etc. is working as it should.
When I purchased the car two years ago, I discovered that the ECU was not connected. Since then, the motor has been rebuilt, installed and "dialed in" by a shop that advertises itself as Porsche specialists. They installed a new 02 sensor, reconnected the wiring harness and stated all was working fine. While the source of my idling and start problems may indeed lie elsewhere, it has been advised that after verifying cold, warm and system pressures, it is now time to verify all is well with the Lambda system (I have a digital WUR installed, and have been working with the company owner to verify IT'S proper operation up till now... ).
My question is what is the best way to go about this systematically. Start at the ECU side or the 02 side ? What are the best test equipment and procedures to employ ? So far I have changed out the 02 sensor relay at the ECU, checked to be sure that the 12 (13?) pin harness connectors are installed and engaged, disconnected and reconnected the FV connector and examined the 02 sensor itself, and it's connection to the pin connector inside the engine bay (see photo). In doing this, I did notice that the 02 connector as well as it's wire leading to the harness had both seen better days. It looks as if the aforementioned harness lead has chaffed a bit over the years (although it may still be functional as it is ?). Also, the plastic surrounding the wire at the pin side, looks damaged (the pin has been removed due to looseness, and will be soldered on again if this unit is deemed usable).
So, the questions are, 1. Should I be looking at replacing the above mentioned connector and/or lead ? and 2. How should I go about my testing procedure to verify that everything in this Lambda system is working ?
While I am a relative newbie to the CIS system, I have done a bit of research on it including reviewing the Primer on the system, a number of Pelican posts and the Tech BBS on the subject. I have a voltmeter, vacuum pump/gauge as well as a CIS tester at this time (I also have a determination to understand this magnificant bastard of a fuel system, and get it all on the same page with itself !)
Anyway, all comments, advice and suggestions are thoroughly appreciated !
Cheers all, and thanks you.
[img]http://forums.pelicanparts.com/uploads24/02+sensor+connector+and+wire1413359670.jpg[/img