|
|
|
|
| Author |
|
|
Registered
Join Date: Mar 2003
Location: NORTH CAROLINA
Posts: 2,138
|
No spark at spark plugs...now what?
77 911 turbo with a 85 turbo engine won't crank. Not gettting any spark at spark plugs. The 6 pin CD unit will whine when switch is on. Could the problem be in the pickup unit in the bottom of the distributor. Any easy way to check tach, coil, cd unit, the ignition unit in the bottom of the distributor before I start plugging new parts in? Would this car have a muiltpin brain or control unit as well? Didn't see one under either seat. Thanks in advance. William.
|
||
07-11-2008, 07:43 AM
|
|
|
Registered
|
Check under your seat for a silver box that says motronic, if it is there you have a DME and need to check your DME relay right there beside the box.
85 is the right year I just don't know if the turbo's used a Motronic computer brain.
__________________
DonMo 1984 911 Carrera Targa 3.2 liter, SSI's, Dansk 2 to 1, Steve Wong Chip Columbia, SC "Go Hokies" |
||
|
07-11-2008, 08:05 AM
|
|
|
Registered
Join Date: Mar 2003
Location: NORTH CAROLINA
Posts: 2,138
|
Don. This 85/86 trubo engine appears to be a CIS Injected engine. No motronic box at all. Anyone with any advice here? Thanks
|
||
|
07-11-2008, 11:35 AM
|
|
|
Registered
Join Date: Dec 2007
Location: scottsdale az
Posts: 665
|
replace your cd box. the msd is a good unit
|
||
|
07-11-2008, 02:36 PM
|
|
|
Registered
Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
|
Just had the exact same problem... it was the coil.
Try a different one, or buy a new one. Upside down on the fan housing as the factory installed it is one of the stupidist locations other than clamped onto an exhaust header imaginable. Just turning it around to right side up and lengthening the wires is an improvement, but the heat cycles and vibration from being mounted on the motor kills brazilian or wherever they are made Bosch coils in a few years or less. If thats not it the green coaxial signal wire is famous for going bad too. thats my experience anyway. |
||
|
07-11-2008, 02:44 PM
|
|
|
Registered
Join Date: May 2002
Location: Portland, Oregon
Posts: 12,667
|
Start here: CDI 6 Pin Ignition schematic wanted
Long yet informative: History of Bosch CDI ... toubleshooting info, parts list changes, and schematics ... This too: 6-pin SC/Turbo CDI unit repair documentation Sit at the feet of the master....
__________________
Harry 1970 VW Sunroof Bus - "The Magic Bus" 1971 Jaguar XKE 2+2 V12 Coupe - {insert name here} 1973.5 911T Targa - "Smokey" 2020 MB E350 4Matic |
||
|
07-11-2008, 04:07 PM
|
|
|
|
Registered
Join Date: Mar 2003
Location: NORTH CAROLINA
Posts: 2,138
|
Thanks for the help. I'll look into it.
|
||
|
07-12-2008, 02:17 PM
|
|
1984 Porsche Targa 3.2
