Can be lots of causes for shaking stumbling engine.
Clear code, with OBD2 scanner or disconnect battery. If code keeps popping up. Then it's not gonna gi away.
Check the iridium spark plugs torque their gaps. Ignition coil packs no cracks on the body, rubber sleeve/boot & their plugs/wires. Switch ignition coil packs around to see if problem persists. Process of elimination.
The fuel injectors, fuel rail. Check for age condition, the plugs/wires. Dirty injectors will cause problems.
Fuel pump working, wires/plugs, hoses & relay. Fuel filter & fuel pump are one piece. Replace with a new one if necessary.
Check for old cracked, deteriorating/loose hoses. Replace with new ones.
Age condition of battery. Replace if old/expired no longer cranking.
Check the MAP sensor. Replace if necessary.
O2 sensors? Fluids level & condition? Topped at level?
The mentioned above are non teardown checks. Basic checklist with basic mechanic tools.
If you have an inspection/borescope camera, looks at all the engine's cylinder walls & see if there's no scouring, gouges & severe wall damage.
Can do a compression test.
Last resort is to have a trusted mechanic or dealership to check topside or drop the oil pan & check from the bottom at the bearings/piston for loose/piston slap.
Clear code, with OBD2 scanner or disconnect battery. If code keeps popping up. Then it's not gonna gi away.
Check the iridium spark plugs torque their gaps. Ignition coil packs no cracks on the body, rubber sleeve/boot & their plugs/wires. Switch ignition coil packs around to see if problem persists. Process of elimination.
The fuel injectors, fuel rail. Check for age condition, the plugs/wires. Dirty injectors will cause problems.
Fuel pump working, wires/plugs, hoses & relay. Fuel filter & fuel pump are one piece. Replace with a new one if necessary.
Check for old cracked, deteriorating/loose hoses. Replace with new ones.
Age condition of battery. Replace if old/expired no longer cranking.
Check the MAP sensor. Replace if necessary.
O2 sensors? Fluids level & condition? Topped at level?
The mentioned above are non teardown checks. Basic checklist with basic mechanic tools.
If you have an inspection/borescope camera, looks at all the engine's cylinder walls & see if there's no scouring, gouges & severe wall damage.
Can do a compression test.
Last resort is to have a trusted mechanic or dealership to check topside or drop the oil pan & check from the bottom at the bearings/piston for loose/piston slap.
