Question about 1998 Chevrolet S-10 Pickup

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Dumps raw gas into engine

I have a 1998 s10 with a 2.2 engine, It misses really bad, has bad fuel smoke out of exhaust, after keeping it running ( which is hard to do), it has an excessive amount of gas in the oil. Please help. Thanks

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  • brendafetter Dec 19, 2008

    We have changed plugs and put in some more fuel injectors. But when we put the code reader on it, it read multiple misfire. Is there any sensors that would cause this?

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Just a few things to check. Take off the fuel filter and make sure there is no water in it. If you have put in different spark plugs than AC Delco, then change them to AC Delco. If you haven't looked at the plugs or the fuel filter, then it is way past time to replace the filter and new AC Delco spark plugs only. These places that insist that you use Bosch plugs or split fire plugs don't know ****. The Delco plugs are made especially for your engine and will out last those cheap non-working Bosch plugs.
If the fuel filter and plugs don't fix it, make sure your air filter intake isn't stopped up with a bird's nest. Happens a lot. If it still misses after new plugs, you may have a fuel injector sticking.
The bad smoke is the gas-thinned oil passing the rings and unburnt fuel smoke. The missing really bad is most likely fuel soaked spark plugs. Make sure you change the oil while changing the plugs or you will have a redo. Let us know if any of this helps. Dale

Posted on Dec 19, 2008

  • Dale Ellenberg
    Dale Ellenberg Dec 21, 2008

    If it is just dumping fuel without burning it, the two sensors that it could be are the coolant temperature sensor, which is like a choke on old cars. Make sure you are not looking at the guage sensor. The other sensor would be the oxygen sensor which would be showing a lean condition and be adding extra fuel to account for it. Is a code reader all you have?

    If the spark plugs got wet and never were changed again you will still have a miss because of fuel fouled plugs which most of the time won't cure themselves. You will have to change them again. Let me know. Dale

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