I have the same problem, but my cap is good. I did a compression test and got 110psi on #1 cylinder, the rest was at 150psi +/-4psi. What could it be?
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'91 Turbo Targa 5 Spd.
'87 Corolla GT-S 5 Spd
'91 Accord Daily Driver 5 Spd
Soon to be rebuilt (All to some extent)
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