I have a 2000 Buick Lesabre custom 6 cylinder with around 124,000 miles. I was on holidays for 2 weeks the car was left sitting. When I came house drove that to work 100 miles round trip following day drove that 5 mile up the road and the company engine quickly light come on and it started shaking really bad. Put some fuel cleaner in and filled the tank now when I start it and also leave it to run the organization light is stable on. If i drive it down the street the shakes a little but if I gain a protect against sign it vibrates the whole car and the irradiate starts blinking again, when I start speeding up again the light goes steady. Any clues on what come do? ns live in a very small town and also the the next mechanic is around 30 miles away via the interstate. Thanks for any and all help.

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walk to the nearest auto parts store and have them pull the diagnostic problem codes. So I recognize at the very least what the computer saw because that problematic components and also systems.

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

Probably negative gas or water condensation. Come be certain you require a genuine mechanic. Has actually to be able to check pids data and verify its fuel reason misfire. I can guess much more but you have actually to offer me an ext information.

ns was reasoning that's what the reason was for this reason I put in Gumout Fuel Injector Cleaner the high mileage one. After ns filled the tank and put the in that sounds and also feels a many better, yet it quiet does the shower a tiny bit and also I have the right to feel the not back to common yet. Should I operation it or drive it to get the gas running through it to clean that out? Is it safe to drive? Any help is appreciated. Thanks.

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great evening,I would start by instead of the plugs and wires. Indigenous sitting, the wires might have acquired hard and are leaking electric.https://www.civicpride-kusatsu.net/articles/engine-misfires-or-runs-roughI would additionally check the fuel pressure to be sure the fuel pressure is correct. Short fuel push will set a 300 code.https://www.civicpride-kusatsu.net/articles/how-to-check-fuel-system-pressure-and-regulatorRoyCIRCUIT summary When the ignition switch is turn ON, the Powertrain regulate Module (PCM) will revolve ON the in-tank fuel pump. The in-tank fuel pump will continue to be ON as lengthy as the engine is cranking or running and the PCM is receiving recommendation pulses. If there are no reference pulses, the PCM will turn the in-tank fuel pump turn off 2 seconds after the ignition switch is rotate ON or 2 secs after the engine stop running. The in-tank fuel pump is an electrical pump within an integral reservoir. The in-tank fuel pump offers fuel v the fuel feed pipe, and also in-line fuel filter to the Fuel Rail Assembly. The fuel pump is designed to provide fuel in ~ a pressure above the pressure essential by the fuel injectors. A fuel pressure regulator, attached come the Fuel Rail, keeps the fuel available to the fuel injectors at a regulation pressure. Unused fuel is returned to the fuel tank by a different fuel return pipe. The fuel pump flex pipe attributes as a conduit for carrying pressurized fuel native the fuel pump come the above cover fuel feeding pipe. The fuel pump flex pipe additionally eliminates fuel pump created pressure pulse noise, and also eliminates clamps previously needed for rubber hoses or nylon pipes. The fuel push gauge and fuel pipeline shut turn off adapters are offered for fuel system diagnosis.TOOLS required J 34730-1A, Fuel push Gauge J 37287 Inlet and Return Fuel line Shut-off AdaptersTEST summary Number(s) listed below refer come the step number(s) on the Diagnostic Table. 2. To relax the fuel pressure, refer to Fuel push Relief Procedure. With the ignition move ON and the fuel pump running, the fuel pressure shown by the fuel press gauge should be 333-376 kPa (48-55 psi). This pressure is regulated by the lot of pressure the spring within the fuel pressure regulator have the right to provide. 3. A fuel device that drops more than 5 psi in 10 minutes has a leak in one or much more of the adhering to areas: The fuel pump check valve. The fuel pump flex pipe. The valve or valve seat within the fuel pressure regulator. The fuel injector(s). 5. Fuel push that drops-off throughout acceleration, cruise or difficult cornering may reason a skinny condition. A lean condition can reason a lose of power, surging, or misfire. A lean condition can it is in diagnosed making use of a scan tool. If really lean problem occurs, the oxygen sensor(s) will prevent toggling. The oxygen sensor output voltage(s) will certainly drop listed below 500 mV. Also, the fuel injector width will certainly increase. IMPORTANT: Make certain the fuel mechanism 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 push is low (high vacuum). This low press (high vacuum) is used to the fuel push regulator diaphragm. The low press (high vacuum) will offset the pressure being used to the fuel press regulator diaphragm through the spring within fuel press regulator. As soon as this happens, the an outcome is lower fuel pressure. The fuel push at idle will differ slightly together the barometric pressure changes, yet the fuel pressure at idle should constantly be less than the fuel pressure provided in step 2 through the Engine OFF. 12. A rich problem may an outcome from the fuel pressure being above 376 kPa (55 psi). A rich condition may cause a DTC P0132 or a DTC P0172 to set. Driveability conditions associated with rich conditions can include hard starting (followed by black smoke) and a strong sulfur smell in the exhaust. 13. This test determines if the high fuel pressure is as result of a restricted fuel return pipeline or if the high fuel push is because of a faulty fuel push regulator. 15. A lean condition may an outcome from the fuel press being below 333 kPa (48 psi). A lean problem may cause a DTC P0131 or a DTC P0171 come set. Driveability conditions linked with lean problems can incorporate hard starting (when the engine is cold), hesitation, negative driveability, absence of power, surging, and also misfiring. 16. Restricting the fuel return pipe with the Fuel pipe Shut-Off Adapter describe J 37287 reasons the fuel push to rise above the regulation fuel pressure. Utilizing a scan tool to pressurize the system, the fuel pressure must rise over 376 kPa (55 psi) as the valve ~ above the Fuel pipeline Shut-Off Adapter associated to the fuel return pipeline becomes partly closed. NOTE: do not enable the fuel pressure to exceed 450 kPa (65 psi). Fuel pressure in excess of 450 kPa (65 psi) may damages the Fuel pressure Regulator. 22. Check the spark plug associated with a specific fuel injector for fouling or saturation in order to identify if that specific fuel injector is leaking. If checking the spark plug linked with a specific fuel injector for fouling or saturation does not identify that a details fuel injector is leaking, usage the procedure.