a4sfed928

I am looking for information on a 1982 Euro M28/11 Fuel system. It has the K-Jetronic with an O2 sensor and the frequency valve to control the mixture but I cant find any service information for this system in the US.
I purchased the service manuals on CD many years ago but it doesn't contain anything on the Euro CIS system.
Any information would be greatly appreciated.

Brian.

The Forgotten On

No 928 from the factory equipped with K Jet had lambda control or KE Jetronic. Someone added it to get it imported and it most likely never functioned.

Remove all traces of it and just leave the 02 sensor connected to nothing and the emissions police will never know

GlenL

This

a4sfed928

I don't believe anyone would go to that much trouble just to import a euro.
All of the tubing looks factory.

reanimotion

The lambda system was specific to the USA
if retrofitted at some stage to a Euro 928 then the parts more than likely came from a US market Mercedes or similar
try looking for USA workshop manuals for
Mercedes 450SL http://www.benzworld.org/forums/r-c1...djustment.html
Porsche 930 or 964 Turbo
Volvo 265

danglerb

If its factory Porsche it has a part number on it, same I think for MB, but it could just be a Bosch number. No part number, not factory of any kind.

Post about 1985 sneaking in a Euro ended, and import and federalizing cost about $15k.

a4sfed928

I will try to find part numbers but it sounds like the consensus is its added.

Wisconsin Joe

You might be surprised.

"Back in the day", when it was possible to import a non-US car, modify it to meet US specs (usually lights, emissions and safety), the importers got very creative. The difference in power from a US to a Euro S was significant. Enthusiasts were willing to pay a price for that.

While the process & requirements were supposed to be standardized, the reality was dependent on the diligence of the inspector. Which could vary by a large amount (and may have been 'adjustable' for the right price - a guess, no proof on that).

Look at the wide variance in something as simple as the marker lights. Some have all four, some less. Some are actual Porsche markers, with the fenders cut to accommodate, others are "trailer marker" lights, and in a wide variety of locations.

There are stories about one importer who properly installed 'crash protection' bars (welded steel bars) into the doors, took the required pictures for documentation...
And then used the exact same pics for every subsequent car.
Other stories tell of broomsticks instead of steel beams, with RTV for the "weld bead"

Emissions is just as bad. The "Lambda Box" (also called a "Valentine Box" because it was Mike Valentine of radar detector fame that invented it) was sometimes fully installed and working. Other times it was just put in place to 'look good'.
My 85 Euro has some sort of evap control system. In place, but not hooked up.

docmirror

Go here: http://www.cabby-info.com/cis.htm

Where it says 'click here' to download the procedure, then click on that. The entire process is contained in the PDF.

Test the frequency valve per the instructions on the web page. Then use the PDF to perform the adjustments.

Although this is for four cyl cars, the lambda duty cycle referred to is the pulse width ratio output of the controller. It is the same for 6 or 8 cylinder cars. What you need to find is the output of the lambda which could be pin 3, 15, or 17 of the controller on Porsche(911 uses pin 17 for test pin). Once you have identified the test pin, you can use a dwell meter, or a %duty cycle. If you have or get an electronic Oscilloscope, you can set the exact pulse width. Follow the PDF, it's pretty good.

Note; This presumes that the car is running right, and all normal maint us working on the O2, CIS, cold start, pressures, etc.

a4sfed928

Okay I found a part number on what looks like the pressure frequency valve and its 928.605.103.00 can some one check this number to see what this is?

The Forgotten On

It's the hot start valve for a 83 Euro. This thread has some info on it https://rennlist.com/forums/928-foru...rection-3.html

jpitman2

IIRC there is some stuff on CIS-E in the Watson book on Bosch FI - see if you can find a copy. Price seems to have gone mad since I got mine for $15.
jp 83 Euro S AT 57k

GregBBRD

How about some pictures of what you are looking at?

I've seen several Euro engines with an added (I assume it is added, since many do not have it) hot starting kit. The reason I believe it was added is that US 924 models had a kit available for hot starting problems....of which I installed quite a few.

Bosch came up with a frequency valve in the fuel return line from the fuel distributor starting on the 1980 911's. This valve adjusted the fuel pressure to the injectors in responce to information from the O2 sensor. This system was a bit crude and many of these cars "surged" under normal operating conditions. Many of these cars ended up with the O2 sensors disconnected, which put the frequency valve into steady "middle of the road pulsing". This allowed the tech to adjust the injection to eliminate the "surge" issue. The system improved over the next four years and worked much better on the '81-'84 vehicles....although many of those cars were also operated with the O2 sensors disconnected, also.

This entire system would work very well on the 928 CIS models. The "Valentine" system essentially did this....but was pretty crude....most were defeated after the smog inspection in the same way the 1980 911's were.

jpitman2

In case this is still an issue....the part no above is a solenoid to lower control pressure while cranking, in hot starts. Its fired by a temp sensor 92860510400 nearby, on the heater water outlet, rear of right head. PET page 107-30, item 1 shows the solenoid. My temp sensor went high resistance, and killed hot starts in a certain temp range.
jp 83 Euro S AT 57k

928FIXER

Years ago I bought a used 4.7 euro motor for a project car and it had some additional plumbing and frequency valve added to the control pressure or return lines.I might still have the take off's stuffed into a box in the attic.
It looked very much like what Volvo used on 240's and 260 V6 cars.