i am new here i judt bought my 2000 s2k like 2 months ago 38,890 miles and like two weeks ago my brother in law take my s for a ride and i give him 20$ for gas and the dumb ass put cheap gas on it so now i have my check ingene light all ready replace spark plugs and fill the tank with premium gas and take the light off
but came on again i need some help

 

Octane booster? And I've filled my tank on accident with regular gas...shouldn't cause it to throw a check engine light nor did i replace the spark plugs. As long as you take it easy you should be fine...Are you sure the check engine is the result of bad gas? You should get the code pulled first

 

i all ready did it and said misfire 1,2,3and 4 but when i change spark plugs and misfres gone but i still have the check engine light on

 

Did you reset the check engine light?

 

Try Tums if you have bad gas problems. They have other meds as well.

 

Wouldn't Gas X be better?

 

I ALL READY USE SOME 44K AND I NOTE SOME GAS SMELL IN TO MY CAR

 

^did you tighten the gas cap? lolz...just an idea

 

yes i did it thanks anyways i am going to to try to finish my tank a couple of times more i hope that works

 

Damn... I have almost the same problem. I filled up some 91 gas in chevron and the light came right up when I started the car. Dunno why. Changed Coil pack and spark plugs but the problem couldn't be solved.