Multiple Misfire
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12 Second Club
Joined: Dec 2008
Posts: 319
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From: Richmond,VA
Multiple Misfire My cousin has a 01 z28 and it's throwing code P0300 and P0174, had good spark plugs in already, then put a different stock MAF on it and nothing changed, then swapped o2 sensors from left to right, it showed different on the hp tuners when we did that, we then put a new O2 in replace of the expected bad one, nothing changed, what else could it be
My cousin has a 01 z28 and it's throwing code P0300 and P0174, had good spark plugs in already, then put a different stock MAF on it and nothing changed, then swapped o2 sensors from left to right, it showed different on the hp tuners when we did that, we then put a new O2 in replace of the expected bad one, nothing changed, what else could it be
Really bad tank of gas.....
Bend valves.....( did he hit e rev limiter lately.)
Clogged fuel injectors......
Leaky fuel injectors.....unlikely it's more than one though
Definitely hit the entire border around the intake to check all 8 intake gaskets, those leak a lot.
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Thread Starter
12 Second Club
Joined: Dec 2008
Posts: 319
Likes: 0
From: Richmond,VA
Could be bad gas since he hasn't drove it in over a month, he just mentioned that he hit some ice last winter and it started acting up after that, could have messed up the wires on the o2 sensor
