Question about Chevrolet S 10
My chevy S10 loses power and backfires when I pull out in it. Especially when I am going slow. when I pick up speed a little at a time it will run good, but, when I slow doen it backfires again. I have replaced the fuel pump, the fuel filter, the plugs and the distributer cap and rotary button. It still does the same thing. THe computer code says it is a code 33 problem. what does this mean? Please help!! I am at my wits end. firstname.lastname@example.org Vickie Lambdin
Posted by Anonymous on
A large vacuum leak is likely the problem. Could be the intake gaskets. If you have power brakes, are they working ok? If not, suspect the booster diaphragm has failed. Is the pcv valve in place? Any vacuum hoses not connected?
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Posted on Jan 02, 2017
It sounds very likely that it is going lean. Could be a bad Mass airflow sensor or a fuel pump, maybe plugged injectors. The first thing to do if you can get your hands on one, is to put a scan tool on it that reads live data and go up a long steady hill while you are watching the O2 sensor voltage. It should toggle back and forth across .5V, if it remains below .5V while you drive, then you know it's not getting enough fuel. If so, check the fuel pressure to spec. If it is good, then the pump is fine and you're chasing the other two.
Posted on Mar 08, 2009
My first instinct tells me timing chain or belt, but it could be a vacuum line loose, cracked or disconnected. Using a stethoscope, or a length of gasline hose held to your ear, and with the engine running, listen for a hissing sound. Be sure and wiggle all the hoses you can. You might make one hiss. If you don't find anything, get a timing light, and check your timing marks. They should stay in basically one spot. If it's jumping around a lot, you need a new timing chain or belt. Good luck.
Posted on May 01, 2009
IN your distributer under the rotor is a magnet and a pickup coil (the magnet is known as a pole piece) check your pickup coil for corrsion (green in color) and the module and also check pole piece for cracks in the magnet where the rivets hold it together. sometimes oil wicks up around the distributer shaft because of housing wear or the pieces just wear out over time.
Posted on May 16, 2010
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