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4kq doesn't like to rev
My 87 4kq doesn't like to rev much above 4000 rpm. Around 4200 in any gear
it will really stop pulling, and will continue to rev only with a lot of
encouragement. I rarely rev it this high, but sometimes it's nice to be
able to get going. Below 4k rpm it's totally happy.
I thought it may have been a clogged cat, but I just had it out and it
looks great. Interestingly, the car is happy to rev well above 5500 when
it's in neutral.
Any ideas? Fuel restriction?