1. OBD2 is a Standardization for protocols, data, DTC's and connector style for all manufacturers. Not just an enhancement to an existing system. Lets point out a few examples ..
1995 Super Coupe - Ford OBD system, no monitors, comprehensive only. Flashes codes on the dash.
1995 Corvette - GM OBD system, no monitors, comprehensive only - but it has an OBD2 DLC connector, still .. doesnt work on an OBD2 scan tool, the software is all OBD1 based. Flashes codes on the dash.
1995 Mercedes, Mercedes OBD, comprenensive only .. the best youre going to get out of this is a blinking light that translates to codes.
.. not one of these cars is nearly as capable as a 1994 4.6 Tbird with OBD2, it has monitors, it displays generic Pxxx codes, etc ..
2. They are OBD2, they just dont have that particular feature implemented. Even without the EVAP, OBD2 wasnt supposed to be fully implemented until 1996 and still some manufacturers did not fully comply, Toyota was selling cars in the USA without OBD2 in 1996. Todays cars
3. Doesnt matter when the VECI was printed or the vehicle was manufactured, it was ahead of its time, it didnt actually need to be OBD2 until 1996 and they introduced it in 1994, two years ahead of time. Vehicles sold in 1996 wouldnt comply to current 2010 ISO standards. So saying a 1994 vehicle doesnt comply with 1996 standards is pointless, it was legal for sale at its time. None of the cars sold today are going to have the same features as the next generation OBD system, but im sure OBD2 will still be around for a few more years, its been 17 years already, 19 if you count 1994's.
Nobody NEEDS the EVAP monitor, its just there to make the EPA happy. You release more HC's into the atmosphere every time you fill up the gas tank than you do out of the tail pipe. Vacuum leak ? That'll probably show up as a P0171 / P0174 lean code, or the engine runs rough .. dont need a monitor to tell me the EVAP is malfunctioning, especially when your average response to an EVAP Gross leak detected code is to replace the gas cap.
Sorry to get off topic.
Xasbys - you have a wiring problem, probably pin 16 doesnt have power to the DLC connector that powers up the scan tool. Check your wiring.
Marc - Hard to say why your car just dies without testing compoents or monitoring the different systems while the car is running to determine loss of crankshaft position signal, or something else the car relies on for feedback while its running, most likely to be a failed sensor, or a wire that is heating up or losing connection.
Last edited by dDUBb; 05-26-2013 at 12:02 AM.