Join Date: Mar 2000
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Re: 91 S10 that sputters & Jerks??
after you get the rich code, you should pull your plugs and see which cylinders are running rich. if it is all of them, then it might be something electrical, but if it is only a few of them, it is probably something internal. I had this type of problem too. Took the truck to an electrical place and they said it was fine. I changed all the things you did too. It turned out to be 2 bad valves and bad valve guides. so i had those replaced and it runs good, no problems like i had before. it was kind of bad news to hear that i had bad valves, but it was nice to finally know what the problem was.
hope this helps
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