Question about 2000 Oldsmobile Alero

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Service engin light is on.

Trouble code said it may be carbon buildup. I put in fuel injector cleaner
( Lucus). How can I shut off the light to see if it comes back on.

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You can go to Autozone and have the code pulled and turn the light off, but if there is a problem the light will come right back on. Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you will need to have the car diagnosed and repaired. Let me know what the codes are.

Posted on Jan 31, 2009

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1995 S-10 Blazer- service engine light is on?


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The knock sensor is famous for causing all sorts of trouble If you have a code for it, it probably needs to be replaced.

It could be a faulty sensor, valve or blockage in the EGR (tube) from a carbon buildup.

in some cases it may be a problem with the ecu

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Dirty throttle body sounds like the problem, remove the throttle body and give it a good cleaning, blow it out good with compressed air around the ports and butterfly to remove all the carbon buildup.Hopefully this will fix it or try a strong fuel injector cleaner in your gas first.Hope this helps

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Will not turn off


WHEN ENGINE KEEP RUNNING WHEN YOU TURN OFF IGNITION.THIS IS CALLED DIESELING CAUSED BY IDLE SPEED TOO HIGH.TOO MUCH CARBON BUILT UP ON PISTON HEADS AND VALVES HEADS. WHEN YOU TURN OFF ENGINE HOT SPOTS LIKE CARBON BUILT UP ON VALVE HEADS STILL HOT GLOWING.IF YOUR ENGINE HAS LEAKING FUEL INJECTORS THE DRIPPING GAS WILL IGNITE FROM THE GLOWING CARBON ON VALVE HEADS THIS WILL KEEP ENGINE RUNNING.THE ONLY THING YOU CAN DO POUR A FUEL INJECTOR CLEANER AND ENGINE CARBON REMOVER IN GAS TANK.A BOTTLE OF SEAFOAM WILL DO. SECOND OPTION IF ENGINE KEEP DIESELING.YOU PROBABLY HAVE TO REMOVE HEADS BUY A WIRE USE ON A ELECTRIC DRILL AND CLEAN CARBON OFF VALVES HEAD IN THE HEAD. IF YOU HAVE DIESEL ENGINE FUEL SHUT OFF VALVE MALFUNCTION.

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I have a 89 corvette with probally a fuel problem. I had day chevrolet replace the fuel injectors and filters and drove the car 500 miles which it ran fine. I then stored the car in the garage for a month....


the carbon build up is not important here. your intake probably has moisture built up from being stored and exposed to condensation. what i suggest is go to your local auto parts store and buy a bottle of K-100 fuel system cleaner and get a fresh tank of gas in it and put the alotted amount of cleaner and run it for a little while. if that does not work than you may have an ignition problem. the first thing that i would personally try is new plugs and plug wires.

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The fuel pressure regulator is not adjustable,


Focus on cold air intake or just clean the air filter.

Filter injector need lubrication to free up the deposit.

I recommend two tank full of Chevron and Lucus fuel injector cleaner.


Lucus will also remove carbon deposit on the cylinder head.

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Sounds like bad carbon build up, have you tryed using fuel injection cleaner yet? Because of the buildup, I would suggest putting it in with only a half a tank (to get a higher concentration of cleaner vers fuel). Once in, run it down the highway (the cleaner works best when the engine is hot) until you are almost out of gas, then fill it up and add another bottle of injector cleaner (alway add the injector cleaner after filling as the cleaner will foam if added before and this will lead to gas spillage at the pumps). Run the car normally. If it is just carbon, by you next tank of gas the problem should be solved. As pervention, I recomend using fuel injection cleaner every 4 tank fulls (for most people it works out to about once a month).

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