SOURCE: 99 buick Lesabre
hey thanks for bringing me up to speed. ive been working on many other problems but with your great explanation i remember.
we need to check the compression on that cyl. and compare it to the compression on 2 other cylinders your choice.
but before you do this get a can of carb cleaner . and with the car idling spray around the intake manifold in the area of #6 cyl. what we are looking for is a small vacuum leak that would also act like this. with the engine idling and spraying around the intake the engines idle sould not change and if it does when you spray you have an intake leaking.
let me know how it turns out.
later
paul
SOURCE: 2003 Buick Century Custom and the Service Engine Soon Light
You will need to have a reputable mechanic do a diagnostic check on the car to determine the problem. This should pull up a code number in your car's computer and help point the mechanic and you in the direction of the malfunctioning part/s.
Just today, I had a diagnostic check done on mine for nearly $45.00. The mechanic was able to figure out the reason why my service engine light was staying on. I knew my car's radiator fans failed to run when car's engine was hot except when the A/C was running. I had changed out the sensors and was never able to get the light to go out or get the fans working. They were able to determine that the 25 amp fuse for the fans located under the hood was blown. After replacing it, the fans worked as they should, my car runs cooler and the engine service engine light is now out. Of course there are many possible reasons why the service engine light may come on including problems with the car's emissions. A reputable mechanic can solve your problem.
SOURCE: Buick Century 2003 service engine soon light
My service engine light was caused by a cloged passage from my EGR valve. Mine is a 3.1 with fuel injection 2003. All I needed to do was pull the two bolts over the intake plenum and remove the vacuum connection to the PCV valve. Then clean out the EGR port just below the vacuum connection in the throttle port. I would remove the rubber intake to vacuum it out. The carbon was like rock in there. Service engine light cleared on its own.
Dave
SOURCE: Fuel Pump Regulator on 2003 Buick Century 6
easy,it's on the fuel rail,make sure that is the problem and not the pump,check fuel pressure before the regulator.
TIM..........
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