94 turbo possible EZ69 failure???

[Cobalt]

Car has been running beautifully no issues always started without a problem. Had new rubber mounted and balanced went to drive car home got a mile away from the shop and the engine cuts out at the light. Would not turn over. Pressed on the contacts to the EZ69 and it fired up made it home and died again. This happened a few times and each time I either removed the plugs or pressed on them and the car ran again. Each time it happens the car runs for a shorter period of time before stalling. I also watched my AFR's and noticed that as it starts to die AFR's are at 20% which I am assuming is a result if inadequate spark.

Unique to the 94 part number 96560270602

Questions:

Anything else I can check that might be contributing to the stalling other than the EZ69?

Does anyone know of someone who repairs them? I tried everything I can find on the internet the only place is in Germany ECU.de they do repair them but will not ship to the US due to customs and insurance.

Does anyone have a spare they want to sell in good working condition or are willing to lend me to verify that it is the issue?

Porsche does sell re manufactured units but they are expensive and in Germany and I have a number of events I was planning on attending in the next month and I seem to be screwed.

Also there is a white cream substance on the back of the unit I am assuming it is some form of insulation to prevent electrical current from passing from the unit to the chassis? Am I correct in my assumption and how does one find replacement for this.

Any advice is appreciated.

[Black_Hat]

Check the connector that goes to the fly wheel sensor, they fall apart. it is on the drivers side of the motor going from near the ez-69 towards the flywheel ....they cause a stalling issue or dead ignition

The EZ-69 is expensive and if you get a used one they can go out at anytime

I have found the aluminium plate they mount to can have a bad ground that causes cutting out over bumps and can ruin a ex-69 if not addressed with a good ground.

the grease (white paste ) is thermal paste (conducts heat to the aluminium plate)same as used computer components ...amazon sells this

I replaced mine with a electromotive crank fire xdi2 and got rid of the distributor , coil , ez-69
i can tune advance and have knock control , soft touch rev limit
XDi-2 for Porsche 911, 964 & 993 : Clewett Engineering, The complete solution for ignition & fuel injection
if you take off you front pulley richard clewett will add a 62-2 wheel

the 91-92 part is different from the 94 part

[Cobalt]

Originally Posted by Black_Hat

Check the connector that goes to the fly wheel sensor, they fall apart. it is on the drivers side of the motor going from near the ez-69 towards the flywheel ....they cause a stalling issue or dead ignition

The EZ-69 is expensive and if you get a used one they can go out at anytime

I have found the aluminium plate they mount to can have a bad ground that causes cutting out over bumps and can ruin a ex-69 if not addressed with a good ground.

the grease (white paste ) is thermal paste (conducts heat to the aluminium plate)same as used computer components ...amazon sells this

I replaced mine with a electromotive crank fire xdi2 and got rid of the distributor , coil , ez-69
i can tune advance and have knock control , soft touch rev limit
XDi-2 for Porsche 911, 964 & 993 : Clewett Engineering, The complete solution for ignition & fuel injection
if you take off you front pulley richard clewett will add a 62-2 wheel

the 91-92 part is different from the 94 part

Thanks. I will check on the connector first. If this were ten years ago i would change the unit out but with the value of these cars i am keeping things stock-ish lately. Good to know about the paste. It is the first I have seen this used. Creates quite the mess when removing the unit. I am not sure what to think though the connector comes up as NLA from Porsche not sure which is worse the cost of the EZ69 or not being able to buy replacement parts.

[turbo ride]

On my '91 about a month after I got it died suddenly and it turned out to be the Flywheel sensor. Black_Hat's advice, now as it was for me back then - is dead on.

I recently acquired a spare EZ for my '91. As Black_Hat noted it is a different PN tho

[willtel]

I stumbled across this.

BBA reman. ABS, ecu's, throttle bodies, air mass meters, MFD and catalytic converters

[Black_Hat]

I'm not saying it is impossible and I'm a EE with a lot of board level experience

But That EZ-69 is VERY difficult to get open

the it has these fine un-insulated wires connecting things

I would like to see one that has been - repaired

disscetion EZ-69

[Cobalt]

Originally Posted by willtel

I stumbled across this.

BBA reman. ABS, ecu's, throttle bodies, air mass meters, MFD and catalytic converters

Originally Posted by Black_Hat

I'm not saying it is impossible and I'm a EE with a lot of board level experience

But That EZ-69 is VERY difficult to get open

the it has these fine un-insulated wires connecting things

I would like to see one that has been - repaired

disscetion EZ-69

I ended up getting a used unit from blackbyrd here which resolved the problem. So I am good for now. Expensive beggar. I tried everyone in the US and they all came up with the same answer. No they won't touch them. DR.ecu claims they can repair them but won't deal with customs. I plan on having a friend who visits Germany often bring the spare to be repaired next time he visits. Porsche will sell re manufactured units for a hefty price and nearly $1000 core charge. Down side of owning a limited production car with MY specific parts I guess.

[Black_Hat]

HA ,

I'm in Wolfsburg right now helping VW with security. I actually brought some car parts and will return with some car parts and some unobtainable damixa kitchen faucet cartridges.

would have helped if I had known

[Tt surgeon]

There is a place called "ecu doctor" or " specialized ecu repair" (in florida) I believe he rebuilds the units. Also, permatune may be able to retrofit modern components into your ez69 box.

[Cobalt]

Originally Posted by Black_Hat

HA ,

I'm in Wolfsburg right now helping VW with security. I actually brought some car parts and will return with some car parts and some unobtainable damixa kitchen faucet cartridges.

would have helped if I had known

That is a very nice gesture and appreciated but I appear to be good to go for now. Didn't want to miss the Norwalk CT event on July 19. It is my sons 17 B-day and I was taking him to the event. Thankfully it is a Sunday otherwise we would be going for his drivers license test. Sad i just realized he has not driven in the car since he was 7.

Originally Posted by Tt surgeon

There is a place called "ecu doctor" or " specialized ecu repair" (in florida) I believe he rebuilds the units. Also, permatune may be able to retrofit modern components into your ez69 box.

ECU doctor will rebuild it for 400 euro but they will not ship back to the US or deal with customs so turned me down. If this were a few years ago I would go the retrofit avenue but with values where they are only factory parts will do no matter the cost. Car seems to be running fine with the new unit. Not sure why the original failed all the common failure points like the speed sensor connector and everything else in the car look showroom new. There were no signs of a problem until it just quit. Very strange.

[fallup86]

Hi guys, I know this is old post, but I would like to know, what is the symptom for EZ69 failure?
Is it only affecting the Ignition? How about fuel system? As currently there is 1 964 Turbo (94) cant start. Fuel pump not running & no ignition at spark plug. Really appreciate if someone can give some info about this. Thanks

[Cobalt]

Very hard to say but I would start with the fuel pump fuses and fuel pumps and go from there.

What did you do to determine no spark? I don't recall if the pumps are controlled by the EZ69 or not. I haven't worked on the turbo for a while and have been working on a lot of C2's which are very different so I get confused.

Hopefully it is simple as the EZ69 for the 94 turbo is NLA and from what I hear nobody repairs them anymore. I keep a couple of spare just in case.

GL

[Black_Hat]

here you go ,

check this , turbo control unit

main function of 96561813001 is voltage supply for ignition, fuel pumps and lambda controller,
https://rennlist.com/forums/964-turbo-forum/464290-turbo-control-unit.html

[Black_Hat]

a bad Crank sensor will kill spark ...donno about pumps

Ive repaired both

[Black_Hat]

Then there is this:
https://rennlist.com/forums/964-turbo-forum/710025-no-spark-on-c2-turbo.html

good luck

[fallup86]

Fuel pump fuse & relay are working fine (removed & checked). But whenever I crank the car, the fuel pump relay didn't actuated (the pump is working if I just manual actuate the fuel pump relay).
I replaced the Turbo Control unit as it control the grounding for the fuel pump relay. But still no positive result.
For ignition, I removed the spark plug and the suppressor, I put on the engine (as earthing), during cranking no spark at the spark plug (also there is no voltage at the ignition coil).
Hopefully luck will side with me

[turbo ride]

Did you confirm the flywheel sensor connector is good? Common problem like the other guys said. That happened to my ‘91. Do you know anybody local with a 964T? Could swap their EZ in to see if car runs. 3.3 and 3.6 are different but close enough to diagnose if that’s the issue.

Brandon
‘91 Turbo

[fallup86]

Dear all, sorry for late reply on this, was away & very busy.
For update, I have swapped:
- EZ69
- Turbo control unit
- Crank sensor (993 version)

Car still unable to start. As per picture attached. There is no - or ground given for [Actuation fuel pump] & [Actuation ignition relay].

Really appreciate your guys feedback on this.

[heliolps2]

Check the over boost switch and the other sensors are plugged on the back left side of the intercooler corner as well as the ground wire the should be bolted with 10mm bolt hasn't broken off. also under the intercooler there's air temperature sensor.Make that's plugged in. The coil would be another thing to check. From I can remember you can NOT just check it for voltage like other cars. Maybe some here can tell the right way to check the coil.

Also I wouild go to Reenlist and post this issue on the 964 Turbo forum, there's more 964 turbo people there.

[fallup86]

Hi heliolps2, for overboost switch/sensor, I have checked the connector, is intact same goes to the temperature sensor. Issue is there is no 12V supply from Turbocharger CU to the overboost switch.
For ignition coil, I can say it is working as when I force activate the ignition relay (using finger) there is spark at the spark plug. But there is no signal from Turbocharger control unit to activate the ignition relay, thus there is no spark.
Same goes to the fuel pump, it is working when I force activate the relay with my finger, but when starting, there is no signal from Turbocharger control unit. Both signal for fuel pump relay & ignition relay is ground.