Well I just put my truck back together, went to warm it up. While I was sitting in it, the check engine light wasnt on, but when I went to give it a little gas you can hear something like pressure releasing somewhere below the driver side seat. Maybe Catalytic Converter, right when I did this my check engine light came on. It happens as soon as I tap the gas pedel (every time). Its a 92, 4cyl, 4wd. Does the catalytic converter go bad and is this even the cause or could it be something else? Also could this be the cause of the check engine light?

Also it does have a vacuum leak somewhere I been trying to find it but I dont think this is the cause.

Thanks,
Mario

 

Well should I just buy a new catalytic converter?

Thanks,
Mario