Unfortunately the EDU gizmos do seem to time out .
As in Many die in use... as the years pass by.
Best advise would be to source a still working used one..
(Or find a decent Electro wizard to try and patch it.. Its a Japanese made item.. if that helps..Could also try the old Reflow the solder joints trick??)
and hope it continues to work during your ownership of the car.
This is the symptom of the power (12v) dropping out -- leaving the EDU "thinking" the car is just started so it cycles the low-fuel light & check radiator light on, and then the gauges are back to normal...
I (kinda) hate to just run an independent hot lead to the EDM to see if that solves the problem -- it's too easy for me to say I don't see a back feed issue but...
One could try running a hot lead from the fuel pump (or other ignition switched circuit to the EDM, add a diode in the line so a "back feed" couldn't occur when turning the car off.
It may be time to start thinking about building my own gauge cluster. All I really want is speed, rpm, volts, temp, oil pressure, vac/boost, and fuel quantity. All the other bits I can do without. Just need a VSS signal to the ECU. Everything else would be better served with little round SVO gauges
that weren't blocked by the steering wheel... ;ol;
I fixed this on mine by reflowing the solder joints on the EDU connector. Used to drop out regularly but has been good now for about a year. A lot of electrical glitches on these cars seem to be caused by bad solder joints. (Early lead-free solder?)
Voltage regulator -update- need help
So while im driving my battery light comes on and my voltage will dip from ~13.9 to anywhere from 10.5-12.5. It's getting worse. I am going to order a new voltage regulator. Will my car be OK driving a lot until the part arrives? (does the VR...
Now that I have fixed the Informatiion display
The check engine light is on,
I imagine it has been on all the time I have owned the car.
Why did I fix the display unit to see the check engine light!!
When I turn on the key after about 2 seconds the CEL flashes 4 times quickly, then a delay...
I've had my eyes on a 1988 9000 Turbo and may be viewing it tomorrow for the first time,
I found the buyer's guide from saab9000.com and it was a great read but felt like it wouldn't hurt to grab any additional advice from the forum members.
The ad mentions that the car runs and drives but...