"Why point the rotor to 4 ?" that is cam setting, spark is #1 firing. but spark can be timed using #4 too. (same tdc mark) but timing light is on #4 wire.
the cam cog marks are at 12pm (both) and that is #4 . firing. Cam shaft rules, i cant change the profile of this cam. well not easy....
if below 1000 feet?
you need 150psi (min cold, hot is always more, 180 typ.) compression, if not?, something is very wrong.
i'd rent a gauge or barrow one from a friend.
or check your lawn mower, mine reads 100psi. typical.
if reads 50, oops. gauge is funky.
OR connect the gauge to shop air, and see 150 to 175 psi. matching your gauge the air tank gauge for free?
the bench mark is important, so we can then work EFI issues.
is your cat bad and melted.? (plugged up) drop the CAT (loosen flange 8mm gap ? rack it down.. so engine can breath) and see if compression returns.
we've seen cats so bad compression is like 50.PSI.. depends on the amount of the melt...
a cat can clog and the cranking vacuum is 0 inches HG (0 bar)
the cam cog marks are at 12pm (both) and that is #4 . firing. Cam shaft rules, i cant change the profile of this cam. well not easy....
if below 1000 feet?
you need 150psi (min cold, hot is always more, 180 typ.) compression, if not?, something is very wrong.
i'd rent a gauge or barrow one from a friend.
or check your lawn mower, mine reads 100psi. typical.
if reads 50, oops. gauge is funky.
OR connect the gauge to shop air, and see 150 to 175 psi. matching your gauge the air tank gauge for free?
the bench mark is important, so we can then work EFI issues.
is your cat bad and melted.? (plugged up) drop the CAT (loosen flange 8mm gap ? rack it down.. so engine can breath) and see if compression returns.
we've seen cats so bad compression is like 50.PSI.. depends on the amount of the melt...
a cat can clog and the cranking vacuum is 0 inches HG (0 bar)
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