Pinging under a load
seafoam didn't help.cut the cat out,replace the air vavle cause there is no egr....changed the timing belt...this truck pings and only smoke when it pings i think its loading up with gas...fuel regulater is ok...one day it started doing it...94 octane with a booster don't work....im ready to blow it up......
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94 ranger 2.5 liter
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