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Q: 94 mazda b4000 has one cylinder with no compession. it runs but futs at low rpms on 1994 Mazda B4000

my friend said it might be the coil pack. or does it need a hole rebuild?
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no check engine codes. the check engine light is on. they checked it but i don't have the code.
pour a small amount of transmission fluid in the cylinder to loosen the ring. try it it really works
how much trans fluid? a ounce or some drops? did it work for you? does it bring compression back. or?
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