EFI did work on the head again. Thanks to JMM, I had the slack side chain guide break and the tensioner was stuffed cause they didn't modify the oil pressure valve. The valve worked it's way out and jammed between the timing cover restricting oil flow. They replaced both guides, tensioner and modified the oil pressure valve (just marked around it with centre punch) then tuned it there in house. Only ran 10psi instead of 11psi which hi-torque tuned it on.justa6 wrote:Wow car is magic. Why did you tune it again? And not at hi-torque. Said 420 earlier.
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