Main Menu

944 Turbo Mystery No Start or Shut-down from Idle

  • 1986
  • 944 Turbo
Mileage: 
150 000
Electrical
STOCKBRIDGE, 
Georgia

This car has been restored mechanically and electrically to 'as new' condition, and well maintained over the 16 years I have owned it.  When the engine was renewed/rebuilt, everything the master mechanic wanted to do was approved, including a new/complete wiring harness and related componets.  It now has a 'mild chip' which the mechanic said increased the horsepower, but he would not say by how much.  The car runs great, I love it and the results of the rebuild are well worth what it cost.  About 3 years ago, it began this  'mystery no start' problem, or shut-down from idle for no apparent reason.  I have replaced every relay, sensor, fuse, connectors (crankshaft sensors) that might be related, and some of them, like the DME, at least 3 times.  The car runs great, but the problem remains.  I have discovered that squeezing the top connector to the crankshaft sensor will almost always allow the engine to start.  I am thinking the electrical contact of the 3 pins may be less than perfect, so I used tie-wraps to squeeze the connector halves tightly together.  The intermittent problem remains.  I squeeze the connector and the engine starts again, so here is my question: if this is allowing the pins to make better contact, why would the engine not shut down when I pull on the connector halves, not apart, but enough to reverse the compression from the squeeze?  I am beginning to wonder if this is just superstitious behavior.  Thanks for your feedback.  

Chuck Diver

You must log in to view answers associated with technical questions. Join PCA to participate in our community.
0
No votes yet