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Well depending on what it is. Most of the times you have 2 banks. Banks 1 and 2. Each bank controls 3 injectors each. When one injector is bad, usually shorted it shuts off the whole bank to protect the engine
random misfire. usually fuel related. clogged injectors, clogged fuel filter, weak pump. if it runs rough in the morning and gets better as it warms up, it's probably clogged injectors.
sound like flooding caused by dirty clogged fuel injectors.the injectors by being clogged and dirty.when you turn off car the injectors will leak causing plugs to foul out. go buy a bottle of fuel injector cleaner.go to gas station fill up gas tank.then pour a bottle of injector cleaner in gas tank.drive car around to allow injector cleaner clean out fuel injectors.
If the fuel preessure reg. is on the fuel rail after the injectors before the return line and is clogged fuel pressure will be higher than specs.but will be in the fuel rail.If reg. is before the injectors(as in at the beginning of the fuel rail) and it is clogged then there probably wont be any fuel in the line. I beleive the injectors may be the point of concern.Check the injector fuses first.
take line off before filter see if gas is coming out at time of key engagement, if not its fuel pump.if yes then reconect and disconnect on outlet side of fuel filter this will tell you if filter is clogged
You probably have clogged fuel injectors. Pour a bottle of STP fuel injector cleaner in your tank and see if it helps. If not, most tune up shops can clean your fuel injectors for about $30. Another possible reason is your fuel filters are clogged. Buick fuel filters are inline and can be found under the hood on the fuel line leading to the fuel injectors, and relatively cheap, simply replace the fuel filters.
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