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924 no spark

 
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porsche715  



Joined: 05 Apr 2014
Posts: 13
Location: wisconsin

PostPosted: Sat Sep 27, 2014 8:35 am    Post subject: 924 no spark Reply with quote

i just took out engine and replace it on my 924 n/a and all seems to have went well except now i am not getting stark from my distributor. the coil is putting out electricity but still nothing from the distributor. any suggestions?
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Fifty50Plus  



Joined: 28 Feb 2008
Posts: 1424
Location: Washington DC area

PostPosted: Sat Sep 27, 2014 10:54 am    Post subject: Reply with quote

A bit more information is needed.
What year car, what distributor?
The coil gets 12 volts from the battery, ramps it up and then discharges the high voltage spark to the distributor four times per rotation based on a signal from the distributor (points or optical wheel).
_________________
1979 924 NA race car H-Prod SCCA
1982 924 NA race car - Sold
1981 924 Turbo sold
1982 924 Turbo sold
1972 911 E race car - traded for Cayenne Diesel
1975 914 1.8 Building for H-Prod SCCA
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fiat22turbo  



Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR

PostPosted: Sat Sep 27, 2014 12:06 pm    Post subject: Reply with quote

Wrong section, but did you reconnect the large ground strap at the coil?

How about the distributor pickup connector?
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)
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porsche715  



Joined: 05 Apr 2014
Posts: 13
Location: wisconsin

PostPosted: Sun Sep 28, 2014 5:00 am    Post subject: Reply with quote

1978 and its rotor no points
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porsche715  



Joined: 05 Apr 2014
Posts: 13
Location: wisconsin

PostPosted: Sun Sep 28, 2014 5:02 am    Post subject: Reply with quote

ground strap yes. but I believer there is supposed to be 2 wires connected to the distributor but I cannot seem to find where the came from or go to.
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Ian89C4  



Joined: 01 Apr 2011
Posts: 561
Location: North Carolina

PostPosted: Sun Sep 28, 2014 8:47 am    Post subject: Reply with quote

If I remember correctly the 78 has a points distributor...I could be wrong.

The only two wires going into the distributor should be the HT lead from the coil going into the center of the distributor cap and if you have a HAL sensor distributor (in lieu of the the points one) you will have that connector as well towards the bottom of the distributor.

Make sure you have 12 volts going to the coil, easy to check with a volt meter. You could have a bad coil. Prior to pulling the engine it may have been limping along, but with a refreshed motor there may not be enough spark and she won't run.

Also check you ignition timing, cam timing and overall timing...that may be an issue as well.

Are you spark plugs fouled?

Make sure the spark plug leads are all seated well and the connectors are clean and not corroded.

Did you reconnect your grounding straps to the engine? it has to be grounded or the spark plugs won't fire.

Good luck
_________________
Ian Edgerly
North Carolina

Current:
1981 924 SCCA/ChampCar Weissach Race Car ("Serenity")
1987 924S ChampCar Endurance Car ("Der Weg")
1980 924 Euro ("Wahala")
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porsche715  



Joined: 05 Apr 2014
Posts: 13
Location: wisconsin

PostPosted: Sun Sep 28, 2014 11:47 am    Post subject: Reply with quote

I am getting sparks from coil. not sure what volt but I hooked a spark plug to the coil and got amazing spark. everything else is brand new except distributor
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KDJones2000  



Joined: 14 Sep 2010
Posts: 322
Location: Phoenix, AZ

PostPosted: Sun Sep 28, 2014 1:05 pm    Post subject: Reply with quote

My guess is that you haven't timed the distributor correctly so that the rotor is pointing to the #1 post on the distributor cap.

Put everything at TDC and check that the rotor is pointing to the little notch on the distributor. Once that is done, make sure that your #1 wire is connected to the correct post on the cap.

BTW the '78 has a Hall sensor but no points.

Good luck....
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1987 924S SPEC car
Team Toofah Racing
1988 944 Turbo S
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