Question about 2000 Buick Century

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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?

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That has to do with your idle air control valve (IAC). It is controlled by the pm and more diagnostic tests are needed to narrow down exactly where the problem lies. Check all wiring and connection to IAC and pcm 1st.

Posted on Dec 22, 2016

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Posted on Jan 02, 2017

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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.

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My buick Century (2000) is running ragged and rough.. (Started sunday) and the Service Engine light is FLASHING!!! --Service Engine light has been on, but it has never flashed. I notice when i speed up a...


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.

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1999 buick century won't accelerate over 30 mph


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.

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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,
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The oil life will change to 100 percent.
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Service engine light


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.

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1997 buick century


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

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