Time to pull the head?
I have seen broken springs that you cannot tell are broken, singles and duals, but the rough idle and issues there should be figured out before anything else happens.
That's all I have seen as well, but if the valve pops off the seat during combustion it "could" cause a sneeze or backfire. Be the same essentially as timing being off causing a sneeze or backfire since combustion happens with a valve open.
Thread Starter
Joined: Nov 2003
Posts: 6,216
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From: Wichita KS / Rancho San Diego
Finally got some hard data in today. We have leakdown done on 5 cylinders and will finish tomorrow. Results: #7 - 6%, #5 - 4%, #3 - 4%, #2 - 13%, and ... #1 - 29%.
Obviously bad news, especially since the bad rocker was on the other bank.
Obviously bad news, especially since the bad rocker was on the other bank.
