Code po507 came up on my 2000 Buick century. Service engine light flashes when I accelerate and vehicle runs rough. Any help diagnosis on this?

How To Reset the Service Engine Soon Light in a 1999 Buick...

1. Put the key into the ignition and turn it to "Run." Don't start the engine.
2. Press down slowly and fully on the gas pedal, then release it. Do this three times in five seconds.
3. Watch for the "Service Engine Soon" light to start blinking. This indicates that the system is resetting itself. ...
4. Start the Century's engine

engine light flashing means a problem needs immediate attention ----have the vehicle scanned most auto stores offer this service for free more than likely the viberation is what is setting off code

P0304 is engine misfire #4 cylinder Several things can cause a misfire #1 electrical which you have covered #2 Mechanical Test engine compression is should be around 150 cranking and 120 running . internal valve train components can cause bad compression and the valves then self. #3 fuel injector can be the cause suggest swapping with a know good cylinder and see if misfire follows injector.

Get thee a Chiltons/Haynes repair manual for your make/model/year. The troubleshooting section will offer possible causes of your problem. We had same problem, then pulled new (supposedly pre-gapped plugs) and found the gap to be wrong. Could be one of those idle position/throttle position sensors. Is it throwing any codes? An OBD-II should cover this year of vehicle.

is the check engine light on ! if so have it scanned to find problem code. auto-zone will scan for free, with a OBD-II scanner, as long as light is still on. if vehicle was running good before this happed it could be a few things wrong. tuneup, airfilter, throttle body dirty, fuelpump ( low fuel pressure ) or a clogged uo fuel filter. hope this helps! even a dirty maf sensor will cause, poor acceleration.

I just put in new fron pads in my 2000 buick century and the track off and the anti lock brake light and the service engine soon stays on

YOU COULD HAVE CLOGGED FUEL INJECTORS.IDLE SPEED TOO LOW.LEAKING EGR VALVE DIAPHRAM.

How to Reset the GM Oil Life System

After changing the engine oil, the system must be reset.
1. With the engine off, turn the ignition key to RUN.
2. Fully push and release the accelerator pedal slowly
three times within five seconds.
If the CHANGE OIL SOON light flashes,
the system is resetting.
3. Turn the key to OFF, then start the vehicle.
The oil life will change to 100 percent.
If the CHANGE OIL SOON light comes back on,
the system has not reset. Repeat the procedure.

From the GM Factory service Manual:
P0341 - Camshaft Position (CMP) Sensor Performance
The other thing about this code, is that it can be caused by a faulty ignition module, or the cam sensor magnet on the timing chain gear, behind the engine front cover that the sensor mounts to. These possibilities would
require a bit more involved diagnosis than just replacing the sensor related
to the code.
I have done a tech. bulletin search for this code, and come up with nothing.

Again, need to get harness checked, and if wiring OK, further diagnosis of
the ignition system.

you need to fine out what the codes are . take it to autozone they will check it free