Question about 1999 Pontiac Grand Am GT
Have you checked the fuel pressure? As a note modern Catalytic Converters seldom if ever fail, the older "Bead" type do, these new ones are a monolithic ceramic brick grid and are VERY durable, so whomever gave this information to you was wrong.. You also need to check the electronic engine control systems computer for fault codes.
Posted on Feb 10, 2012
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Posted on Jan 02, 2017
SOURCE: On my 1999 pontiac grand
A clogged catalytic converter can cause serious engine performance issue from cylinders misfiring due to the computer trying to compensate for the air/fuel ratio and if they become totally restricted they will blow up. a grand am I had worked on had a baseball sized hole in the side of the converter and the ceramic catalyst substrate inside looked like burnt coal from a bbq grill. With the vehicle running place your hand lightly over the exhaust when you just start the vehicle and it's not hot the exhaust flow should blow your hand away if it doesn't seem to have much force against your hand odds are the exhaust is restricted as your mechanic noted
Posted on Apr 23, 2011
SOURCE: can i drain the torque
I don't know of any way to drain a torque converter without removing it. It is possible to REPLACE the fluid by using a flush machine - but not to drain it...assuming you don't want to create drastic and irreparable damage to the transmission bell house and the torque converter itself.
Posted on May 27, 2011
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