NASTY99VETTE

Hey i have a 99 corvette ls1 coupe..ok and im having a problem with it. ok it started about a month ago. at first the motor would shake around about 70mph, like it was kinda misfiring or something. and then it stops for a day or so. ok its been a month since it started and now it does it at low speed and high speed. but it comes and goes, sometimes it will do it and sometimes it wont..so i changed the plugs and wires and it still does it just as bad if not sometimes worst. does anyone know would it could be or what i can do to fix it.

razorclaw99

iTrader: (7)

is it throwing any codes? If so, get them scanned

WhosNXT

Could be a number of things. Since you have changed the plugs and wires we can rule those out. How many miles are on the car? It could be a bad coil, dirty MAF, could be a bad injector a lot of things come to mind. If you do not have any codes you need a scan tool so you can see whats happening when the problems happens.

Texfinn

iTrader: (39)

Clogged cat, maybe?

JosephIV

iTrader: (14)

Check codes, Autozone can do it for free. WhosNXT gave great advice about using a scan tool. Can you borrow one from somebody?