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Old 02-28-2007, 01:53 PM
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Join Date: Nov 2006
Posts: 288
how to check for spark?

car: 1987 260E 2.6L 137000miles

Hello, How do I check for spark on this vehicle?

Right now it cranks but wont' start. Parts recently replaced with new ones: Fuel Pump Relay, Ignition Coil Module, Distrib+Rotor, Spark plugs + Spark Wires.
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Old 02-28-2007, 01:57 PM
MattBelliveau's Avatar
Gotta another one...
Join Date: Jun 2005
Location: NE Ohio
Posts: 1,685
Puul a spark plug, ground the body of it to the engine block, and crank. You should see a nice blue spark between the posts. If it is yellow, you have a weak spark. If you are just testing the wires, just grab a cheap plug from the store (~$1), gap to spec, and try that. If you have spark, time to check for fuel. If you have both, check you crank position sensor (if equiped).
1989 300E 144K
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