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-   -   No Spark….. Help! (http://forums.pelicanparts.com/porsche-911-technical-forum/207206-no-spark-help.html)

Tim Stevens 02-18-2005 09:35 PM

No Spark….. Help!
 
I just put the engine back into the car after resealing it. Tried to turn the car over and it would not start. I have tracked it back to the coil not getting any spark. I have checked the fuse and all is good. Where should I go from here? Thank you in advance - Tim

scottb 02-19-2005 12:01 AM

Get back to basics. Retrace your steps.

Are you sure you re-connected every ground?

Have you re-connected the reference sensors?

Is it possible the factory alarm is engaged?

DME relay?

beamonk 02-19-2005 04:19 AM

check the sensors on the rear, ground strap clean and good on the tranny? BTW, I have the heater duct whenever you want it. I will bead blast it, if you can wait a while till I get an old oven, I can powder coat it for you. Good seeing you the other night.

Tim Stevens 02-19-2005 05:09 AM

Thanks I will start here. John what sensors are you referring to? Could it be sensor on the side of the transmission? I am in not hurry for the back dating tin. Whenever it is convenient for you. Thanks again for the help - Tim

3.2 CAB 02-19-2005 07:05 AM

Yep, the ref/speed sensors are mounted on the drivers side of the bellcrank housing, they might have been bumped out of wack during the work being done. Also check the DME relay, make sure it is plugged in good. Be sure to disconnect the battery before you pull the relay and reinstall, as there is always power to this circuit. Check to make sure you have the sensors plugged into the correct connections, as the two sensors are the same part. Ref mark sensor should be marked BG, and the speed sensor marked DG. If the air gap is off, it should be set at 0.8mm.

MobileWrks 02-19-2005 08:21 AM

(bosche cd unit?- they say never disconnect with the battery connected,it will burn out)

Tim Stevens 02-20-2005 01:24 PM

Ok here is what I have done
Check and cleaned all electric connections and ground straps.
Checked voltage going to the coil.
Switched the ref/speed sensors connections.
Switched Dme

The spark at the coil is not consistent and it is week

Any other suggestions would be welcomed!! Thanks for the help so far - Tim

Tim Stevens 02-21-2005 05:35 PM

After switching the sensors I am getting spark at the plugs. But it still is not starting. I have pulled my Alarm system out. Any other suggestions??? If not I am loading it on the trailer and bringing it to a shop. This is so aggravating.....

beamonk 02-21-2005 08:03 PM

Tim, go to the basics, fuel, air and fire. You have the fire, are you getting fuel? Make sure you didn't get your fuel lines mixed up. Check the DME relay and fuel pump relay. Is the pump churning?
John

beamonk 02-21-2005 08:09 PM

Is it trying to kick over? Maybe you have it flooded. Let it rest overnite or try new plugs. Make sure it it getting fuel, possibly try a new relay of rthe DME. Eventually, it will come clear what it is.

Tim Stevens 02-22-2005 07:47 AM

Thanks John! I will give it try this afternoon. I will let you know


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