1988 V10 Suburban TBI running rough

[MudDiGGer25]

Originally Posted by SuburbanStevie

Hello, what do you know about the condition of the distributor? In particular the journal bearings that support it. I had a similar issue, and took a long time to finally find that the bearings were so worn-down that the distributor shaft was rattling all over. Causing the plugs to fire as much as 10 degrees off.

Good luck

I just swapped the distributor a couple days ago and the one i put in was in immaculate shape, no slop or play and movement was very smooth. But i think i might have figured out the issue


My exhaust is not "perfectly airtight" at the flange because 1 bolt is snapped off, and i have either a loose rocker arm or a sticking valve because the exhuast pulls in a piece of paper on every revolution and im thinking that because the exhaust is not flowing smoothly in a single direction it is causing the o2 to read falsely and then the ECM over compensates to the point of almost stalling