Quote:
Originally Posted by xska
Did you try initializing Power-fc and install maps back in?
Also,did you try setting timing to all 20 degree and check actual timing at 4500?(by just revving in neutral).
If it's cas signal related, you can see timing bouncing around.
And what happens after 4500? dose runs good at 7000? or 4500 is like limiter?
There was one case i had problem with valve spring floating and it just dose it at 6000 and not after.
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This happens at all RPMs above 4000 or so....like sometimes it barely makes it past 4000 eventually, but then does the same at higher RPM if it can even make it there.
I am like 99% sure it is not a valve spring...bc initially the problem was limited to 6000 RPM...
However, what you (and Steve Shadows) mentioned about setting timing to 20* across the board and free revving is a very good idea, and one that I am going to try this weekend.
Thanks for the idea.