You should conduct spark test in spark plug on high tension wire and compression test in the that plug 6&3 strong gas smell is the result of unburn fuel!!!!but the best solution to bring the car to the expert!!!!!!
SOURCE: Check Engine Light on and flashing on Montana 2001
Most major Autoparts stores will get the Diagnostic codes from car computer and give you info on why light is on and what the problem is.
SOURCE: 2001 Firebird 3.8 misfires
Check your alternator see if you have a drop in voltage on your tack,then it is the problem.I too was a victim of high price tune up and still had a problem with a misfire.and cover your coil pack with a piece of rubber water run of onto your power pack .Another thing is to use a silicone spray on all wires.
SOURCE: 2001 Pontiac Montana - what is a misfire #5?
Without your actual trouble code, I am assuming that you are have a misfire on cylinder # 5. The computer cannot really tell what is causing the misfire only that cyl 5 is not putting out full power. If it misfires when cold then smooths out as it warms up, I would say it is probably an injector that is sticky, as it warms up it starts working properly.
Testimonial: "Thank you for your suggestion. I will have that checked out. I will also ask my mechanic what the actual trouble code says."
SOURCE: The 2001 Montana van with
my 2000 pontiac has code 420 when on idle is ok on drive or park I step on the gas it drives like motor mounts are broken I let the gas go and it rolls good I change coils wires plugs crank shaft speed sensor I even took of converter thinking it was plug it,on stray pipe replace EGR and still have the same problem, please help lucky fly 119@ yahoo.com thanks
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