96 chevy 7.4L dually wont run with cylinder 1 plug in

Performance modifications, tips & tricks

Moderators: Eric@PPE, James B., flyingpolarbear, VicC

Post Reply
Ar0d63050
Posts: 1
Joined: Wed Oct 17, 2018 5:28 am
Location: Anderson SC

96 chevy 7.4L dually wont run with cylinder 1 plug in

Post by Ar0d63050 »

I got a 96 3500 that had the 0411 pcm conversion done on it. It wasnt running and i messed around with it A bit got it to run when i took out the cylinder 1 plug but as soon as i put it back it it dies. Im lost and dont know to much about these things. I got it as a project and would like any help possible thanks

James B.
Moderator
Posts: 2823
Joined: Thu Apr 03, 1997 4:00 pm
Location: '98GMT400, '98GMT410, '99GMT420, '00GMT420

Post by James B. »

The distributor cap has developed an arc path between the main and #1 electrodes. Basically #1 is getting fire for every cylinder before the arc even passes through the rotor. Replace cap.

Post Reply