|
924Board.org Discussion Forum of 924.org
|
View previous topic :: View next topic |
Author |
Message |
DootToot
Joined: 31 Oct 2018 Posts: 8 Location: Australia
|
Posted: Mon Apr 15, 2019 11:15 pm Post subject: Ignition Signal |
|
|
I have a 1982 Porsche 924 Turbo, purchased it from someone who rebuilt the engine, put it back and it does not start. We found that there was no spark at the coil. We found lots of little wiring issues, each one we thought was the cure but we were wrong. But they seem to be a step in the right direction. We have just recently found a bad contact in the connector that plugs into the DTIC. We now see the tacho jumping slightly (which it wasn't before) and with an oscilloscope we are measuring the timing signal going into the ignition module (pin 6). This signal is now showing a train of pulses when we crank the engine. Pulse widths are about 50ms with a peak voltage of about 0.7 volts going down to 0.3V. I assume this is the required voltage to switch the transistors in the ignition module but it does seem a bit low still. I would be really grateful if someone can let me know what the voltage levels for the ignition signal coming out of the DTIC and going into the ignition module should be so we can work out if we are on the right track. We suspect we have a faulty ignition module now but not sure. Many Thanks. |
|
Back to top |
|
|
Carrera RSR
Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK
|
Posted: Mon Apr 15, 2019 11:22 pm Post subject: |
|
|
Search '924 turbo crank sensor' and all will be revealed...... Its possibly failed and and causing your issues. Also they are hens teeth _________________ 1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
|
Back to top |
|
|
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|