Cranks but won’t start -DME is good
11-21-2018, 12:13 AM
#31
Rennlist Member
Thread Starter
Even on injected cars, you will smell fuel if you have fuel but no spark.
If you do not hear the fuel pump, that is your issue (whether it is fuel pump itself or something related to power to it). Easy enough to check power with a multimeter.
And yes, sitting for 5 months would make me think fuel pump is stuck. Hitting them does work IME (but not IME on a 993). Sometimes even rocking the car works. How much fuel is in the tank now?
If you do not hear the fuel pump, that is your issue (whether it is fuel pump itself or something related to power to it). Easy enough to check power with a multimeter.
And yes, sitting for 5 months would make me think fuel pump is stuck. Hitting them does work IME (but not IME on a 993). Sometimes even rocking the car works. How much fuel is in the tank now?
11-21-2018, 01:14 AM
#32
Eventually the car will be up and running again, please don"t forget to tell us about what was cause of the problem then!
The norm here is that we never are told what caused the prpblem, or are there hundreds of non running 993s out there!
Are You sure it's not the immobiliser?
The norm here is that we never are told what caused the prpblem, or are there hundreds of non running 993s out there!
Are You sure it's not the immobiliser?
11-21-2018, 11:53 AM
#33
Rennlist Member
Thread Starter
Eventually the car will be up and running again, please don"t forget to tell us about what was cause of the problem then!
The norm here is that we never are told what caused the prpblem, or are there hundreds of non running 993s out there!
Are You sure it's not the immobiliser?
The norm here is that we never are told what caused the prpblem, or are there hundreds of non running 993s out there!
Are You sure it's not the immobiliser?
11-21-2018, 12:14 PM
#34
At the most, it should take about 15 minutes to determine the source of the no-start.
11-21-2018, 12:38 PM
#35
11-23-2018, 03:18 PM
#36
Rennlist Member
Thread Starter
The two wires to the coil do not seem to be getting 12 volts on either coil. That was while cranking.
11-23-2018, 03:57 PM
#37
Rennlist Member
The workshop manual details a bunch of steps for this kind of problem. Have you worked through those yet? I did some of that, like even got an oscilloscope to check the signal from the doohickey-black-box-objects under the driver seat (igniters?). Some good stuff there.
11-23-2018, 08:46 PM
#38
The black wires on the coils supplies the 12 volts. You can jumper that point to the plus terminal of the battery with the key-on and attempt to start the engine.
11-23-2018, 08:47 PM
#39
Rennlist Member
Thread Starter
The workshop manual details a bunch of steps for this kind of problem. Have you worked through those yet? I did some of that, like even got an oscilloscope to check the signal from the doohickey-black-box-objects under the driver seat (igniters?). Some good stuff there.
11-23-2018, 10:26 PM
#40
11-24-2018, 10:33 AM
#41
Rennlist Member
Thread Starter
That 12 volts comes from the ignition switch (#15) which also powers the injectors. Hopefully, someone didn't add an aftermarket alarm function to control that voltage.
The black wires on the coils supplies the 12 volts. You can jumper that point to the plus terminal of the battery with the key-on and attempt to start the engine.
The black wires on the coils supplies the 12 volts. You can jumper that point to the plus terminal of the battery with the key-on and attempt to start the engine.
11-24-2018, 11:33 AM
#42
RL Community Team
Rennlist Member
Rennlist Member
PM me with your regular email address and I will forward the wiring diagram for this issue.
