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Why is gas leaking from exhaust on 1990 300zx?

Updated: 10/20/2022
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Hglover

Lvl 1
11y ago

Best Answer

mine did the same thing and the scary part is it would still crank.it was my fuelpressure regulator.when it goes bad the motor doesnt know so it sends the extra gas into the intake and straight to the pistons and dumps it out the exhaust.first get away from the car and let it dry thoroughy and unhook the battery cable.have a mechanic verify regulator problem.youll have to change oil since the fuel will slip past thee rings and into the oil pan and may cause scarring of the cylinder walls.pull plugs out and let it dry out before reassembling.keep a check on the muffler after repairs are made and pray that it cranks because mine hasnt yet.i will do a compression test and i recommend the same for you.good luck.

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Q: Why is gas leaking from exhaust on 1990 300zx?
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