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Re: Previous periodic stalling, now won't start
Almost sounds like a faulty fuel regulator. I've seen that happen without triggering the OBD codes. I'd check the wiring on the fuel pump as well as it may not be running correctly. Also, check out the fuel filter. A clogged up fuel filter won't register the OBD either.
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Well mike the mechanic you use must not be very good ! Did he test fuel pressure ? This has no fuel switch but there is a relay an it is turned on by the PCM - powertrain control module ! When it won't start you need to find out what is missing Spark or fuel an go from there ! I will send a link for a youtube video on how to test this ! You could also test the fuel pump circuit at the relay in the under hood fuse/ relay junction block ! With a volt ohm meter test the relay socket , Two pin's should have batt. + one should have ground an the other should show open . that is the one from the PCM . GM Fuel Pump Relay TestingNo Start Diagnostic Basics EricTheCarGuy
Ask your mechanic to please verify that he has the cam set in exactly the right position, and that the wires connecting it are still in good shape. The "misfire" could be that the computer is seeing the fuel-air explosion, and thinks it is at the wrong time due to the sensor being off.
does the van stall going down the road or at idle? the won't change gears at 4000 rpm and the no start condition unless disconnect the negative cable sounds more like a computer problem. when the cable is diconnected the ECM and the TCM have to go thru a relearn process which can be some of your issues. have your mechanic do a quick learn on the trans module to see if it helps the shifting problem. the ECM on the other hand can throw out codes that can make you chase your tail and end up replacing every sensor and still have the smae problem. you may want to check for corrosion at the ECM connections.
IT CAN STALL FROM LAKE OF FUEL OR INTAKE LEAKS THE FAST IT WOULDNT RESTART LEEDS ME TO THINK ITS A IGNTION PROBLEM POSSIBLE BAD CRANK SENSOR, GET IT TOO A SHOP THAT IS GOOD WITH DIAGNOSTICS THEY CANSOMETIME STALL OUT WITH NO COMPUTER PROBLEMS ? BUT DUPLICATING THE STALL IDS SOMETIMES INTERMITTANT IS AGRAVATING TO TECHS SO BE PAITENT , HAVE SOMEONE DO A T.S.B. SEARCH FOR THIS PARTICULAR PROBLEM MAY FIND A BULLETIN GOOD LUCK