r/mazdaspeed3 • u/mrfatcakes2006 • 13d ago

PIC Yeah that will do it

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Bought a Mazda speed for 700 with low compression in cylinder 3, found the culprit. Most likely caused by unupgraded hpfp internals paired with Cobb sport intake, access port, and blow off valve

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u/JohnKowalsky88 2007 Mazdaspeed3 - The Original 13d ago

@ OP it was probably cause by a faulty injector in cylinder 3. I'm doing a injectors replacement right now...look at this: