1991 Isuzu Pickup Q&A

1991 Isuzu Pickup Question: back 2 cylinders not firing

Just replaced head gasket and intake manifold gasket. All vacuum lines connected. New plug wires. Back 2 cylinders not firing. Timing set properly. -
Answer 1
Have you checked for fuel injector pulse. Use a noid light, and perform and injector leak down test to rule out injectors. -
Comment 1
Thanks for the response but my ole truck is carburated. One thing I thought of is I didn't use any gasket sealer on the intake manifold gasket. So I'm gonna go back and do that and I'll see if that may be it. Re- adjusted all the valves, too. -