93z28lt1

So im having what i think is a misfire in my lt1. So far i have replaced fuel filter, plugs, wires, thermostat, and waterpump. My waterpump went bad not to long ago so im guessing my optispark is probably going bad. MY symptoms of the misfire is under a heavy load at low rpm the car will basically fall on its face. If anyone has any suggestions of what the problem is please let me know.

93z28ltone

Any codes

93z28lt1

no sir i wish it would throw one. i threw a egr code a little while back

93Z2871805

iTrader: (5)

Checked for vacuum leaks?

93z28ltone

Did the miss go away at all when you did the plugs and wires

93z28lt1

Yah I checked for vacuum leaks and no after the plugs and wires it still did the same thing

stephanj51

iTrader: (1)

mines doing the same thing, hooked a mac mentor to it all signs are pointing to the opti at this point

93z28lt1

Does any one else have any ideas before I go ahead and buy an opti

93z28ltone

Injectors try seafoaming the car