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turbohead7 turbohead7 is offline
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Join Date: Oct 2002
Location: Lawrenceville, NJ
Posts: 97
Porsche Crest Warm No-Start

If you want to fix your car you need to diagnose it properly. Get the car to mess up and then check for spark at the plug wires. If the engine cranks and you have spark, check to see if the injectors are clicking while someone cranks the engine over. They can be felt/heard with a long screwdriver/stethoscope. If you're missing spark or injector signal while cranking; the DME, DME relay or bellhousing sensors are all possible culprits. If you have injector signal, good spark, and adequate compression that engine has to fire----provided the proper amount of fuel is being delivered. Check cranking fuel pressure, running fuel pressure and residual fuel pressure. The injector signal itself is pulse-width modulated, otherwise known as "on-time". This time, measured in mS, depends on the Vane Airflow Sensor signal, coolant temperature sensor and O2 sensor. Although not likely the CTS could've been damaged by an overheat. First things first---see what you're missing and get back to us.
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Even though I drove a GT2, I still love my 944.
Old 05-25-2003, 10:25 PM
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