Rough idle and running rich

[kermit_rr]

Ok so smoke into the intake, into the cylinders, past the piston rings and back up the middle of the distributor? Possible?

 

[kermit_rr]

The 3.9 and the 4.0 have the same bore and stroke

 

[pwood999]

LR Marketing eh ? Never looked at that, but I see in RAVE both are 3950cc.

 

[marjon]

The 3.9 and the 4.0 have the same bore and stroke

LR Marketing eh ? Never looked at that, but I see in RAVE both are 3950cc.

Its my understanding that it changed to "4.0" when it went to serp belt and GEMS control.

But its the same engine, except the bla bla bla .
Like the 4.6 is the same as the 4.0 except for the, crank and the bla bla bla

J