Koenig-Specials 928

Just read that OBD I started in 1981 to 1995 cars while OBD II started in 1996 and onwards. Do we have these in our Porsches?

Hessank
1989 S4 Keonig

AO

You have Bosch LH-Jetronic. I believe it was unique to the 928, but I could be wrong.

Airflite40

ODB II is one of the reasons that lead to the demise of the 928

lorenolson888

85-86 LH 2.2 and EZK (some have called it EZF?)

87 + LH 2.3... and EZK...

LuftMassenMesser (airmass measurer???) is what the L jet used and is a barndoor type air meter...

Luftmasse-Hitzdraht is the heated wire type mass airflow sensor seen in 85 and up 928s...

OBD II seems to standard for diagnostics and programming that came about...


Loren Olson

John Speake

The 928 and other Porsches from MY88 onwards have a Porsche version of OBD1. This was an early attempt to get car manufacturers to standardise on diagnostic communication protocols. But this only applied to some basic parts of the software and Porsche didn't release info on their diagnostic codes.

OBD1 also didn't standardise the connector systems used to attach a tester to a car, so every manufacturer invented their own - hence the Porsche 19 way round connector.

OBD2 which became an industry standard in the mid -90s finally made a common connector system mandatory. But individual car makers, although using the basic communication standards, protect their IP by having their own fault codes and "tricks".

Porsche is particularly secretive...

hacker-pschorr

Like VW if you don't have VAGCOM. Friend of mine took is 1.8t to Autozone for their "free scan" due to his engine running rough. They were able to tell him "engine sensor". Yea, that helped.

It's really a shame - private repair shops are hurting the most from this. Most cannot afford to buy all the seperate scanners / software.

John Speake

Here in Europe Porsche were taken to court to force them to make their systems available to the independant sector. But Porsche charge so much for purchase and annual licence that they are not economic for the indies.

Vilhuer

AFAIK '84-86 ROW 16V, '85-86 US 32V and '86 ROW 32V use different ignition box than later 32V cars. Its called EZF by Porsche and Bosch while '87+ is EZK.

John Speake

EZF Electronic ignition system, map-controlled

EZ-K Electronic ignition timing with knock controls

Dave H.

it's just the same in the states. anyone can walk into a VW dealer and buy a factory VAS5052 scan tool. if you're ready to hand over about $8,000...

lorenolson888

Hi John,

How is the LH 2.2 and EZF tuner coming... I remember you mentioning some beta testing?

Loren

John Speake

Hello Loren
The LH2.2 ST for 85/86 cars is being used by a couple of people in the US at present. It is working fine, a couple of minor bugs have been corrected.

I expect one or both of these people will post their experiences on Rennlist in the near future.

I am ready to take orders now...

Iris and Kevin

Hi John...not that I'm ready to purchase at this precise moment, but how are you coming on the Tuner for the 84 ROW cars? You still got that brain you're using for testing, too?

Thanks!

John Speake

Hello Kevin
The next stage of the SharkTuner project will be developing the LH2.2 SharkTuner for EZF tuning. This is essential to get the best out of these cars.

As far as Euro 16v are concerned, the current LH2.2 ST will also tune Euro 16v 85/86. The Euro MY84 LH is a very different animal inside the box, and the software is structured completely different to the 85/86 LH boxes.

So these will come after the EZF, if there is sufficient demand. I think DR is going to apply his twin screw s/c kit to the Euro 16v as well. I expect that will be a trigger for us to address the 84 16v LH project.

We are just starting to prepare for the EZF part of the project. Can't give a timescale at present. I would hope for about 6 months.

PorKen

Can the '84 ROW use 85/86 ROW and/or USA LH+EZF with an EPROM swap? Is the µC substantially different?

Not quite the same, but I remember something about Normy having the incorrect USA EPROMs in his ROW.