How long since over-all tune-up? Plugs and plug wires are a good start. What about filters, air and fuel. As far as the fuel filter, make sure no pressure on the system before taking any lines loose.
The 02 sensors are part of a tune-up. With the 02 sensor unplugged, the vehicle was probably running in open loop. Open loop doesn't use the 02 signal.
Can you check for applicable trouble codes? Some of the national brand auto stores will check codes for free. To check codes, yourself, at the least you need an obd2 code reader.
When the vehicle stalls, is it at a stop sign or red light? If so, those are idle issues. Some idle issues can be caused by a leak of some kind like, fuel leak--vacuum leak--egr, something of that nature.
Also, check your idle air system.
Monday, August 11th, 2014 AT 8:19 AM