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Re: Intermittent "Service Engine Soon" light
Gas cap or tank seal up has nothing to do with fuel pump running or pressure.
First check is for spark good hot blue spark to all plugs on a no start.
If good spark check for fuel pressure and 12 volts to fuel pump gray feed or prime wire on 30 second prime or engine crank.
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Remember proper testing gives us the answer to many problems.
MT
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