got a 94 3.4 auto, had many issues with this car so far last summer it was overfueling and sounded like it was missing but just running lumpy, changed ign module and coils still same thing, throws engine light on when driving sometimes but cannot connect to it says error. it then ran real bad now and wont start. iat first crank it fires up then dies instantly and keeps firing but wont start, it sees rpm once fires but not while cranking n eone hanve n e ideas?

 

you shouldnt see rpm while cranking.have you changed the plugs and wires yet ? has the battery been tested ?

 

yes battery voltage is fine, plugs and wires are new.

 

you may have a clogged cat converter