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dunno if this is the best place to ask, but here goes...

My friend's S14 is jerking like hell on every gear change after about 3500-4000 RPM. I drove it myself yesterday to see what he meant. Basically, that's all it is...a jerking that doesn't really allow the engine to go up to 5000 or 6000 RPMs. He has taken it to a few places and they've said a number of different things ranging from broken hydraulic lifters to oil clogs.

Can anyone suggest any other possible faults an SR20DET could go through? The car used to make 315rwhp, but all the good stuff had been taken out prior to him getting married. The car only has a cat back exhaust and an HKS bov left, plus the turbo. We're taking the car to my tuner later this week, but would like to know beforehand what it may be.

any thoughts will be greatly appreciated.

Zak

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