I have a 2000 Buick Lesabre practice 6 cylinder with around 124,000 miles. Ns was on vacation for 2 weeks the vehicle was left sitting. As soon as I came residence drove that to work-related 100 miles ring trip following day drove that 5 mile up the road and the service engine soon light came on and it began shaking really bad. Put some fuel cleaner in and filled the tank currently when I begin it and also leave it running the business light is stable on. If ns drive it under the street it shakes a little but if I gain a stop sign it vibrates the whole car and also the light starts blinking again, as soon as I start speeding up again the light goes steady. Any kind of clues on what come do? i live in a very tiny town and also the the next mechanic is around 30 miles far via the interstate. Thanks for any and also all help.

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go to the nearest auto components store and have them traction the diagnostic trouble codes. So I understand at least what the computer system saw for problematic components and systems.

The password is P0300 multi cylinder failure. Also, noticed today when doing a test journey if ns make a left u-turn i hear a what sounds favor a grinding sound. Many thanks for any and all help.

Probably negative gas or water condensation. To be sure you need a actual mechanic. Has actually to have the ability to check pids data and also verify that fuel reason misfire. I deserve to guess more but you have actually to offer me much more information.

i was reasoning that's what the cause was therefore I placed in Gumout Fuel Injector Cleaner the high usage one. After i filled the tank and also put the in the sounds and also feels a lot better, yet it quiet does the shower a tiny bit and also I deserve to feel that is not ago to common yet. Need to I run it or drive it to acquire the gas running with it come clean that out? Is it safe to drive? Any assist is appreciated. Thanks.

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good evening,I would begin by replacing the plugs and wires. From sitting, the wires might have acquired hard and are leaking electric.https://www.centregalilee.com/articles/engine-misfires-or-runs-roughI would likewise check the fuel pressure to be sure the fuel pressure is correct. Short fuel pressure will collection a 300 code.https://www.centregalilee.com/articles/how-to-check-fuel-system-pressure-and-regulatorRoyCIRCUIT description When the ignition switch is turn ON, the Powertrain control Module (PCM) will revolve ON the in-tank fuel pump. The in-tank fuel pump will remain ON as long as the engine is cranking or running and also the PCM is receiving recommendation pulses. If there space no recommendation pulses, the PCM will turn the in-tank fuel pump turn off 2 seconds after the ignition switch is turned ON or 2 seconds after the engine stop running. The in-tank fuel pump is an electrical pump within an integral reservoir. The in-tank fuel pump provides fuel with the fuel feeding pipe, and in-line fuel filter come the Fuel Rail Assembly. The fuel pump is design to administer fuel at a pressure over the pressure needed by the fuel injectors. A fuel pressure regulator, attached come the Fuel Rail, keeps the fuel obtainable to the fuel injectors in ~ a regulated pressure. Unused fuel is returned to the fuel tank through a different fuel return pipe. The fuel pump flex pipe features as a conduit for transporting pressurized fuel native the fuel pump to the over cover fuel feed pipe. The fuel pump flex pipe also eliminates fuel pump created pressure pulse noise, and eliminates clamps previously needed for rubber hoses or nylon pipes. The fuel push gauge and also fuel pipeline shut turn off adapters are offered for fuel device diagnosis.TOOLS forced J 34730-1A, Fuel push Gauge J 37287 Inlet and also Return Fuel heat Shut-off AdaptersTEST description Number(s) below refer come the action number(s) ~ above the Diagnostic Table. 2. To relieve the fuel pressure, describe Fuel press Relief Procedure. V the ignition move ON and the fuel pump running, the fuel pressure suggested by the fuel press gauge have to be 333-376 kPa (48-55 psi). This press is managed by the amount of pressure the spring inside the fuel press regulator deserve to provide. 3. A fuel system that drops an ext than 5 psi in 10 minutes has a leak in one or an ext of the complying with areas: The fuel pump inspect valve. The fuel pump flex pipe. The valve or valve seat within the fuel press regulator. The fuel injector(s). 5. Fuel push that drops-off throughout acceleration, cruise or tough cornering may reason a skinny condition. A lean problem can cause a loss of power, surging, or misfire. A lean problem can it is in diagnosed using a scan tool. If very lean problem occurs, the oxygen sensor(s) will stop toggling. The oxygen sensor output voltage(s) will drop below 500 mV. Also, the fuel injector width will certainly increase. IMPORTANT: Make certain the fuel system is not operating in the Fuel Cut-Off Mode. This can cause false indications by the scan tool. 8. As soon as the engine is at idle, the manifold press is short (high vacuum). This low press (high vacuum) is used to the fuel pressure regulator diaphragm. The low pressure (high vacuum) will offset the push being used to the fuel press regulator diaphragm by the spring inside fuel push regulator. Once this happens, the result is lower fuel pressure. The fuel push at idle will differ slightly together the barometric press changes, but the fuel pressure at idle should constantly be less than the fuel pressure listed in action 2 v the Engine OFF. 12. A rich condition may an outcome from the fuel press being over 376 kPa (55 psi). A rich problem may cause a DTC P0132 or a DTC P0172 to set. Driveability conditions associated with rich conditions can encompass hard starting (followed by black color smoke) and also a strong sulfur smell in the exhaust. 13. This test determines if the high fuel press is because of a limited fuel return pipe or if the high fuel pressure is as result of a faulty fuel push regulator. 15. A lean condition may an outcome from the fuel pressure being listed below 333 kPa (48 psi). A lean condition may reason a DTC P0131 or a DTC P0171 come set. Driveability conditions associated with lean problems can incorporate hard starting (when the engine is cold), hesitation, poor driveability, absence of power, surging, and also misfiring. 16. Restricting the fuel return pipe with the Fuel pipe Shut-Off Adapter describe J 37287 causes the fuel press to rise over the regulation fuel pressure. Making use of a scan device to pressurize the system, the fuel pressure should rise above 376 kPa (55 psi) as the valve on the Fuel pipe Shut-Off Adapter associated to the fuel return pipe becomes partially closed. NOTE: execute not permit the fuel pressure to exceed 450 kPa (65 psi). Fuel push in excess of 450 kPa (65 psi) may damage the Fuel pressure Regulator. 22. Inspect the spark plug linked with a specific fuel injector for fouling or saturation in bespeak to identify if that specific fuel injector is leaking. If checking the spark plug linked with a certain fuel injector for fouling or saturation walk not identify that a details fuel injector is leaking, use the procedure.