Hello,

For no reason, my ECU just stopped comunicate with the obd port, and the car doesn´t start.

I ear the fuel pump working, but the engine doesn´t start.

It´s strange, because i think the pump is controlled by the ECU, but my Porsche dealer says he can´t connect to the ECU...


help please!

 

The Porsche dealer should be able to answer the question as well as anyone here if not find another dealer/indy shop.

 

The ECU doesn't have to communicate with the OBD2 connector to control the engine.

Obviously many many vehicles (like all of them) work just fine with nothing connected to the OBD2 port/connector.

Is the CEL on?

What are the symptoms of the no start condition?

 

you connected some after marker reader to the obdII port.. you maybe damaged something in the process.. I recall you saying you did just that...
why did you connect that cable? for what purpose? what were you trying to do?

 

Hi mark, i've tryied to flash the ecu, but with a cable that wasn't apropriate (an friend lend me a vag113 to see if it works) and i couldn't connect because i hadnt the drivers. But after that, the car ran prperly for 200miles+ with stops and startings.... it wasn't even on the same day... do u think it had something to do with it? If so, can i do anything to reverse it?

 

I'm curious adelino what the dealer did as far as trying to connect to the ecu and did he offer a suggestion as what should be done/ looked at next etc.

 

Hi,

When i connect to the obd2 port, not even the guys from the oficial Porsche dealer, can connect to the dme. That´s why they say i have to have a new one installed

 

Did you check all fuses?

 

Like I said before sounds like your ecu is toast. Never stop in the middle of a flash.

 

If the dealer or a good independent shop cannot come up another answer your ecu as said above probably will have to be replaced.

 

I second this.

 

yes, i´ve checked all fuses.

I didn´t started to repro, because my cable wasn´t apropriate.

After i tried the unappropriate cable, the car started fine and ran for more than 200 miles (starting and stopping several times).

So... new ideas!!! please!! (sorry for being anoying.... but... i just can believe the DME is toasted!!!)

 

send the dme to your tuner or epl and let them look at it in detail. this should tell you what you want to know

 

When you had that relay issue not too long ago were you able to connect through the OBD?

 

no my inability to connect thru the obdII came after i swapped dme to another prepped unit as the consenus was the dme had an injector driver burnt out in it.( chasing misfires at the time) turns out i had a bad cyl 1 injector. im receiving a new file this week from epl and ill be trying to connect again thru the obdII . strange thing is my durametric cable works flawless. the tuner bench checked my laptop, cable and both dme's i had with no issues

the relay i had replaced caused the car to act like it was immobilized. all accessories would work ie: radio , lights ect. but key would yield nothing when turned except a cel light. the dealership determined a relay in the dme area had burnt and replaced it. i never was able to get a part # or accurate description of what exactly was replaced