I have a 97' chevy blazer with roughly 67000 miles on it with a 4.3 liter vortec. Just recently it's been starting chugging at idle. When I get going it goes back to normal but every time I come to a stop it starts chugging again idling around 500-600 rpms. My check engine light comes on and then it starts flashing.A few times it's died on me. My dad checked the code and it says cylinder 3 misfiring. One time he checked it and it said something like various misfiring. Also, when I come to a stop the brakes work like normal but after I stop and let off the brakes then reapply them the pedal gets stiff like the vehicle was turned off. So far we've replaced the cap, rotor, spark plugs, plug wires, and we've checked for leaking vaccuum lines. We've had no luck and it's still chugging. I'm hoping you might have an answer for it. Is it possible my catalytic converters plugged and I need a new one? I'm kinda tight on money so I don't want to waste it on something that might not fix it.?
Wednesday, August 8th, 2007 AT 9:08 PM