This means the cat is clogged and needs replaced. if you need to drive the vehicle until can be replaced you can punch holes in the cat. WARNING THIS IS CONSIDERED ILLEGAL AND YOU WILL NOT PASS EMMISSIONS TEST IF REQUIRED IN YOUR STATE. However not all of us have the money to spend right away and this is a temporary fix so that you can still drive the vehicle until you can replace it. Your vehicle will run rough or cut off once the cat gets too hot. Also you can damage your engine if you continue to drive it with a clogged cat.
Go to Midas,they will check out for free,I get them to do work on my vehicles,exhaust,a.c,brakes and shocks,good prices,great work,and a guarantee.
SOURCE: 2001 Pontiac Bonneville SE; Transmission: will not
internal tranny problem what you did will not solve problem find a tranny speciallist
SOURCE: The electric cooling fans on my 2004 pontiac
I would check your relays first. Usually your problem is the relay. You may have a Service Engine Soon light on also. This can indicate that your coolant temperature sensor isn't working therefore the sensor isn't telling the computer to turn the fans on. Another quick easy test is to start the car and while it's idling either turn on the a/c full blast or the heater defroster. This should cause the fans to kick on for a length of time. (The length of time can very) If they do come on it would lead me to believe that you have a coolant temp sender problem. If they still don't come on after a few mins, I would definitely look into the relay.
SOURCE: where is a 2004 pontiac bonneville spark plug diagram
try looking in the owners manual. my buick le saber has one
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