Thread: 87 944 no start
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djnolan djnolan is online now
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Join Date: Oct 2006
Location: va
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Simplest and quickest 5 minute way to diagnose a no start for the 2 essentials --- spark and fuel:

Spark: Connect an extra spark plug to the no 1 spark plug wire and jumper the plug threads or side electrode to ground using an alligator clip lead. Crank and watch for spark - should be a strong blue/white - not a weak orange or yellow.

Fuel: Listen for fuel when the key is turned on. The fuel pump should run for a short 3 seconds to pressurize the fuel rail when the key is first turned. Listen for the rush of fuel in the fuel rail or listen for the fuel pump to turn on under the car.

If you have neither it is probably the DME relay, if one but not the other, you get the picture...

Last edited by djnolan; 10-05-2019 at 08:57 AM..
Old 10-05-2019, 08:46 AM
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