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PET calls for the same all years for US. I would double check the markings on each before swapping. If Pat drives his 944 over and his works in your car, make sure yours does not work in his car to confirm. In fact, maybe do this first instead of risking his ECU in your car.
I just talked to Pat and he said that he has an early 85 that works, and he said that we could switch the DMEs to test. Would this work eventhough they are different years (I know there are suttle changes from each year of the early models)
An early 85 DME is compatible with a 83-84 DME. The 85.5+ thru late had a 5V signal for AFM, so you then need to have 85.5+ AFM with 85.5+ DME. Check Clarks Garage
An early 85 DME is compatible with a 83-84 DME. The 85.5+ thru late had a 5V signal for AFM, so you then need to have 85.5+ AFM with 85.5+ DME. Check Clarks Garage
ok so I will put everything on pause for now till we can see if my DME works in his car.
It sounds like you have a line on a spare ECU.
Altough I cannot personally volunteer, since I don't have a 944 at the moment, there is a world where you put your ECU in a flat rate box and send it to one of the folks participating in this thread. They can plug your ECU into their car and see what happens. As far as I know, there is zero risk that a bad ECU can do damage, especially if it doesn't allow the car to even start. I'm sure if you ask, someone will support you in this effort.
It sounds like you have a line on a spare ECU.
Altough I cannot personally volunteer, since I don't have a 944 at the moment, there is a world where you put your ECU in a flat rate box and send it to one of the folks participating in this thread. They can plug your ECU into their car and see what happens. As far as I know, there is zero risk that a bad ECU can do damage, especially if it doesn't allow the car to even start. I'm sure if you ask, someone will support you in this effort.
Pat is driving his 944 to my house and we will swap it this weekend
You know it runs. How does it run under throttle with increased amount of starting fluid? Does it rev up like normal or not?
While it is being revved up with starting fluid, do you know what the injectors are doing in terms with injection pulse frequency via the noid light as do they all increase in frequency with increased RPM as they should?
Also, do the injectors actually open and close spraying into a cup with higher frequency in correspondence to the injector pulse? Also, do they spray corresponding amount of fuel into the cups as the RPM increases with more throttle/starting fluid?
You know it runs. How does it run under throttle with increased amount of starting fluid? Does it rev up like normal or not?
While it is being revved up with starting fluid, do you know what the injectors are doing in terms with injection pulse frequency via the noid light as do they all increase in frequency with increased RPM as they should?
Also, do the injectors actually open and close spraying into a cup with higher frequency in correspondence to the injector pulse? Also, do they spray corresponding amount of fuel into the cups as the RPM increases with more throttle/starting fluid?
I did not test throttle with starting fluid, but it ran with the temp sensor unplugged and I reved it and everything was normal.
05-11-2022, 08:36 PM
