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salcaroprese
Join Date: Nov 2006
Location: Phillipsburg, NJ
Posts: 24
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944S wont start- possible ingition
I have a 87 944S. The one night I couldnt get it started and I thought i ran out of fuel cuz the light was on. I eventually got it started after about 5 minutes and it ran fine. I drove straight to the gas station and filled up. The same thing happened again when I tried to leave. Eventually it started and I drove it home. I have not been able to start it since. I tested the fuel system and it is working fine I have plenty of flow and pressure. pulled plugs and they look fine all wires look fine. distributor and rotor look fine. tested ignition coil..got very poor readings and then bought a new one. Still doesnt start. I have no spark. I am thinking next either the igntion control unit or the DME. I do not know how to test these units or even where the ignition control unit is. Any suggestions will be greatly appreciated. Thanks
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87 944S |
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03-24-2008, 06:11 PM
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Registered
Join Date: Oct 2006
Location: Germantown, MD
Posts: 155
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maybe the dme relay?
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03-24-2008, 06:41 PM
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What he said. it's common. there is a way to jump it out to see if the fuel pump runs, do a search here or at clarks-garage.com
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1991 cabriolet (sold) 1989 S2 1988 S 1987 944 n/a (sold) 1987 944 factory yellow (junked  )
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03-24-2008, 06:45 PM
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salcaroprese
Join Date: Nov 2006
Location: Phillipsburg, NJ
Posts: 24
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dme relay is good and i jumped the relay when i tested the fuel pump which is also good.
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87 944S |
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03-24-2008, 06:48 PM
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Join Date: Oct 2006
Location: Germantown, MD
Posts: 155
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if you have no spark, the dme itself maybe bad. try tapping it lightly it may have some loose connections.
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03-24-2008, 07:23 PM
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More likely the ignition control module than the DME.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually |
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03-24-2008, 08:38 PM
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Professional Bull5hiter
Join Date: Mar 2008
Location: Alice Springs, Australia
Posts: 8,889
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Try disconnecting/reconnecting your speed sensor. At the moment this works for me!
Jeff
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Jeff 83 944 Guards Red 23 718 GT Silver |
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03-24-2008, 11:40 PM
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Its the ignition control module and there is no solution you have to get a new one. When you replace it remove it from the aluminum heat sink that it is bolted to. Clean off the aluminum and use some fresh di-electric grease on the aluminum plate. Then bolt the new module up and you will be in business, the di-electric grease acts as a coupling to transfer the heat to the plate and make the module work like it was designed and last! The 944 S and S2 engines have modules there the only ones.
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03-25-2008, 07:12 AM
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salcaroprese
Join Date: Nov 2006
Location: Phillipsburg, NJ
Posts: 24
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I removed and tested speed sensor and it was around 900 ohms which is within range. Still does not start. Could it also be within the reference sensor? I will check the reference sensor this afternoon.
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87 944S |
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03-25-2008, 08:08 AM
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salcaroprese
Join Date: Nov 2006
Location: Phillipsburg, NJ
Posts: 24
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I will look into the ignition control module asap. How are you so sure that it is the problem though?
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87 944S |
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03-25-2008, 08:11 AM
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salcaroprese
Join Date: Nov 2006
Location: Phillipsburg, NJ
Posts: 24
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I have now replaced the ignition control module with no luck. I am not sure where to look next.
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87 944S |
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03-28-2008, 10:55 AM
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Porsche 944
1989 Duh? 951
