A guy at work suggested tighening the rockers a bit more. Even if lash is good, if the tips of the valves or pushrods are worn it may not be openong correctly. I'll give it a try but will only run it long enough to see if it helps.
As mention earlier I would recommend the other way around if you are going to try this. Too loose will just make the valve train noisy, too tight will cause the valves not to close completely when the lifters are pumped up.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
