|
|
|
|
| Author |
|
|
Registered
Join Date: Mar 2007
Location: NYC berbs
Posts: 345
|
1979 SC Can't start after rebuild
I finished the rebuild and re connected everything, and now I don't get spark.
I tested the Pulse generator from the distributor to the CDI unit (stock) and I get .2 volts. The CDI unit is getting power and it hums after trying to start. I originally thought it was the magnetic pulse generator, but I purchased a used distributor off of a running engine. During the rebuild I replaced the coil, the ignition wires, distributor cap and rotor. Does anyone know what the voltage is suppose to be that the pulse voltage is suppose to be? What else should I check??? Thanks dog |
||
10-16-2010, 10:23 AM
|
|
|
Free minder
|
There is that green little wire that connects to the distributor. If it is bad, no spark...
__________________
1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) |
||
|
10-17-2010, 05:29 AM
|
|
|
Registered
Join Date: Mar 2007
Location: NYC berbs
Posts: 345
|
Thanks for at least trying to help, but I have replicated that wire and I have good continuity on that green co-ax wire.
dog |
||
|
10-17-2010, 09:18 AM
|
|
|
Registered
|
Can you list what you've checked to catch us up on where you're at?
Power at coil? I would start somewhere between CDI and coil first... Was the CDI removed from the car for any reason? Or just unhooked wires to remove engine?
__________________
Kyle - 1980 RoW non-sunroof 911sc - 3.2 Turbo, Mahle P&C, Carrillo Rods, Megasquirt II (Fuel Only for now), re-geared 3rd and 4th 930 gearbox, 2350lbs |
||
|
10-18-2010, 05:30 PM
|
|
|
Registered
Join Date: May 2004
Location: Boulder, Colorado
Posts: 7,275
|
Dog
Can we assume that "don't get spark" means you pulled a plug wire, stuck a spare plug in it, laid it on a grounded part of the case, cranked the engine, and there was no spark? If it didn't, you pulled the distributor center wire and held it near a ground and it didn't spark? If you did, and no spark, you might try your old coil? Did it work before you went to work on the engine? Walt |
||
|
10-19-2010, 05:42 PM
|
|
|
Registered
Join Date: Aug 2008
Location: Palatine, IL. (N/W Chicago Burbs)
Posts: 208
|
Same thing kind of happened to me.
I was sweating bullets, then I played with the plug in the left side engine compartment that Wayne suggested to disconnect, to build oil pressure, and wa la, she started right up. Turns out, that connection is a little tricky to get in. Mike.
__________________
Restoring/Rebuilding Yellow Canary '79 911SC Suspected track car |
||
|
10-19-2010, 06:28 PM
|
|
|
|
Registered
|
Quote:
__________________
78’ SC 911 Targa - 3.2SS, PMO 46, M&K 2/2 1 5/8” HEADERS, 123 DIST, PORTERFIELD R4-S PADS, KR75 CAMS, REBEL RACING BUSHINGS, KONI CLASSICS |
||
|
10-20-2010, 04:45 PM
|
|
|
Registered
Join Date: Jul 2001
Location: mt. vernon Wa. USA
Posts: 8,727
|
Check for spark using your timing light. Attach it as you would if your were timing. If the light blinks on and off, as you try to start, you have spark. You can try it on all 6 spark plug wires to check if you are getting spark at all plugs, if required. It's quick and easy.
Al
__________________
[B]Current projects: 69-911.5, Previous:73 911X (off to SanFrancisco/racing in Germany).77 911S (NY), 71E (France/Corsica), 66-912 ( France), 1970 914X (Wisconsin) 76 911S roller..off to Florida/Germany RGruppe #669 http://www.x-faktory.com/ |
||
|
10-20-2010, 06:22 PM
|
|
|
Registered
Join Date: Mar 2007
Location: NYC berbs
Posts: 345
|
The answer to my riddle was a small two wire plug on the left side just under the CDI unit that connected with a plug on the engine. I had thought it was for my Heater fan (it has the same type of plug) and so I didn't connect it. A friend said connect it and let's see if it starts, and that was it, started immediately.
|
||
|
10-21-2010, 05:37 AM
|
|
Greta
Stella
