chevy venture stalling problem

Asked by Mar 07, 2018 at 04:01 AM about the 2002 Chevrolet Venture

Question type: Maintenance & Repair

Hi, 2002 venture keeps stalling while driving.  Chevy dealer can't work out
problem.  We have changed several sensors like the camshaft, throttle body
and coolant.  We recently changed the ignition pass key.  After that the scan
came back with camshaft sensor error again.

1 Answer

40,835

Old brittle wire harness can be causing intermittent failures, bad or missing electrical grounds, bad engine computer/ECU, or connections/grounds. Should we assume they checked all the basic stuff like timing, fuel pressure, vacuum leaks? Are they scanning for live data while driving when the problem occurs? Obviously without having the same access to the car they have in their shop, it's hard to make suggestions on what to check. I will only say this, I once worked on a car chasing constant multiple random sensor failures, the problem was too many electrical grounds on the wire harness corroded or rotted away, causing a "floating ground" which masked many of the sensor triggers confusing the ECU. It required many hours of painstaking probing and rewiring to fix the problem. And problems like that are impossible to diagnose by a scan tool or without having physical access to car.

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