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Marquis engine starts but stops immediately
It's a 96 Mercury Grand Marquis with 55k milage.
Today I started the engine, then the engine stops 2 seconds later. I tried again and hold the gas padel, the engine running. Then stops right after my foot leave the padel. After 30 minutes, I tried again, the engine starts without any problem. That's the 3rd time in last couple months.
The only thing I could think of is I changed original motorcraft spark plugs to bosch platinum 2+ ones 3 months ago.
Any suggestions are welcome.
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