[jeffs9146]

I have a 82sc 3.0L and had a very similar problem when I first installed the motor. It turned out to be vacuum leaks.

The late 3.0L's will not start with vacuum leaks.......PERIOD!

I pulled the motor and replaced all of the intake gaskets, vacuum lines, airbox, injector seals and runner rubbers. The airbox had multiple cracks and will get worse the more you try to start it and it pops inside the intake.

Once everything was sealed I hooked up a cleaned up shop vac with he hose reversed to blow and hooked to the intake and duct tape sealed. Turn on the shop vac and spray soapy water all over the intake connections. If you have a leak you will see it!