Rough idle after high rpm, need some ideas.

[pocket-rocket]

I've had to take my truck up in the r's higher than it cares for a couple of times now and it doesn't like it. I don't know if it's because it's old and grumpy because it's got 211k+ on it or what, but the fact remains, my truck doesn't like it. I admit, I don't know my old 2.3 like I should, it does a good job of staying reliable, but this problem irritates me. The two times I've had to take it to the redline it has retaliated with a rough idle that takes a few days to go away. My thoughts were that I had some lifters that were not pumping up because of the higher load placed on them so I was considering replacing all the lifters and possibly the oil pump as well to make sure they are getting the oil supply they need. Any thoughts would be appreciated.

Edit: I would like to add that once the rpms go above about 1500 or so it sounds fine and nice and smooth again.

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[95SleeperAcheiva]

I agree, it sounds like your blowing out the lifters and floating the valves. Old Buick motors would do that too.

[pocket-rocket]

Good to know I'm not the only one thinking is the lifters, thanks

Considering checking out a cam from Esslinger if I have to remove it, lol.

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