Answer: Intermittent problems are very hard to diagnose. Your no start problem may be your fuel pump. Try to check it for pressure during the not start problem. Also, check for spark at the spark plugs. From what you described, your problem could be the coil module, the cam angle sensor or the crank angle sensor.
it is illegal to remove a catalytic converter.
If the catalytic converter is defective more than likely the O2 sensor is defective.
A 1996 Pontiac Bonneville requires 5.7 quarts of oil in the crankcase. The oil filter should also be changed with the oil.
Too rich of an air/fuel mixture of one of more cylinders missing and not completely burning the fuel.
There are two cat concerters on that van - were they both changed?
I had an 85 cj-7 doing the same thing. i changed the catalytic converter and problem solved. You may want to try it. The catalytic converter can become plugged or restricted.
bad torque converter .
Not much info to go on but I'm assuming the vehicle has three 02 sensors, one after each bank of cylinders on that V6 and one after the catalytic converter. Bank 1 sensor 2 would be the 02 sensor after the catalytic converter. This B1 S2 monitors the catalytic converter activity. It could be the catalytic converter is at fault. It would be of help to know what the code # was.
There are no set time or milage limits for a cat replacement A cat is normally replaced only when it fails.
The 2002 Mazda MPV has two flex pipes that comes from manifold. One of these flex pipes comes with the catalytic converter. I had it changed at Speedy and it cost around $800.00 cost, labour,taxes incl.
Post Catalytic Converter O2 Sensor seems to be the most likely issue. Could also be the catalytic converter, or an exhaust leak. The cheapest part to throw at it is the O2 Sensor. (cheapest place I've found to get them is autopartswarehouse com)
You should check the wires that are in the steering column to the ignition lock cylinder. They tend to break easily.
in exhaust pipe in front of muffler / catalytic converter, changed mine yesterday.
Could also be plugged catalytic converter Spark plugs and/or wires Timing chain Could also be plugged catalytic converter Spark plugs and/or wires Timing chain
Have you checked the computer codes? If so, what do they say?
Timing is off or fuel & air mixture is way off and it's most likely full. (due to be changed)
It is never going to run right with the converter removed. It is also illegal to operate a vehicle with the catalytic converter removed.
Loss of power and mpg. The check engine light should also come on. the check engine light will not come on if the catalytis converter is going bad..it will however get very hot and start to glow red. The check engine light will illuminate with a bad cat if the vehicle has a post catalytic (downstream) O2 sensor.
some have 2. both are easy to fix. one is on the back of the engine compartment. hope you have small hands and an adjustable wrench and dw 40 to loosen it. the second sensor is under the car near the catalytic converter on the exhaust pipe. if you changed both and you still have the check engine code its the catalytic converter that is bad.
If the car has high miles, try checking the catalytic converter. If it is clogged it will cause the vehicle to lose power.
Disconnect the negative battery cable for 5 minutes. If that does not reset the Check Engine light you will need access to an OBD2 scan tool.
i have changed all my bulbs for a 1994 Bonneville still i have no tail lights for nite driving
well that would have nothing to do with the cat but i would suggest rebuilding you engine.