I JUST DONATEDMY QUESTION IS A FOLLOW UP OF ...

  • Tiny
  • skriegs
  • 1995 Chevrolet Van
  • 160,000 miles

I JUST DONATED-MY QUESTION IS A FOLLOW UP OF PREVIOUS QUESTION-95 CHEVY G20 VAN 350K TBI, VAN WILL ONLY START IF ACCELERATOR TO FLOOR, BLACK SMOKE FROM TAILPIPE, NO POWER, DIES IF ATTEMPT TO DRIVE. I HAVE REPLACED PLUGS(BLACK FROM TOO MUCH FUEL) WIRES, FUEL PRESSURE REGULATOR, CAP & ROTOR.I CAN HEAR FUEL PUMP BUILD UP PRESSURE WHEN KEY IS TURNED ON(INJECTORS NOT LEAKING), NO CHECK ENGINE LIGHT ON, NO FUSES BAD, NO AIR INTAKE RESTRICTION. CAN I UNHOOK EXHAUST FROM EXHAUST MANIFOLD TO CHECK CAT CONVERTOR OR IS THERE SOME CHOKE MECHANISM ON TBI THATS STICKING OR SENSOR THATS CAUSING EXCESS FUEL TO ENGINE. I CAN'T DRIVE VAN TO GET SOMEWHERE TO DO DIAGNOSTICS BECAUSE IT DIES WHEN ATTEMPTING TO DRIVE. THANKS IN ADVANCE-SK

Thursday, April 11th, 2013 AT 1:24 PM

3 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

You're going to need a scan tool to get anywhere with this. You need to be able to look at all the sensor data for something out of parameter.

Coolant temp sensors, MAP/MAF sensors, ruptured pressure regulators are high on the suspect list.

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Thursday, April 11th, 2013 AT 1:29 PM
  • Tiny
  • skriegs
  • Member

Thanks for answer-I'm having trouble renting scan tool for 95 chevy van since this is not OBII system for this year. Auto parts stores seem to only have OBII scan tools. Thanks again

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Thursday, April 11th, 2013 AT 3:56 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

It gets worse. 95 is a transition year and you have a hybrid of OBD1 and OBD2 and you are going to need a professional scan tool for that one.

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Thursday, April 11th, 2013 AT 5:49 PM

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