I just bought a 1998 S-10 5-speed with the 2.2L when I got the truck it had been sitting for quite awhile and the guy coudlnt find the key to it. So I trailered it home and had a key made but when I went to turn the motor over it wouldnt start, after looking at it the previous owner had the negative and positive battery cables on backwards. I switched them back and it started up but it runs ROUGH!!!! I did a full tune-up including all filters and now it runs better but still runs rough.

At idle it sounds alright other than a slight skip, then in nuetral if you accelerate it hesitates bad and wont rev above 3200, then in gear it hesitates bad until about 2500 rpm and then it runs fine, but at the begining of each gear it runs really rough. The gauge cluster is also messed up and none of the gauges work, I tried unplugging it and it still runs the same so I know thats not part of the problem.
Do you think that the battery connections being swapped meesed up the ECU?
The only codes it keeps throwing are lean bank 1, o2 sensor heater bad, and bad EGR...

 

Howdy, Sittinlow88. It dose not sound like the ecu is fryed, and the codes sound legitament. try some high test/ octain fuel , fuil injector cleaner and octain boost to clear some of the gum and varnish out. It also helps with the carbon that builds up around the valves and under the intake.run thrue atank of gas, Disconect the battery before running the addatives fore about 15 minits to reset your codes. Recheck your codes after you've ran thruea fulltank of gas to see if it helped clear some or all your codes.

 

Howdy, Check your blownfuses for the gauges, Do a full tune up, a bad wire, fowled plugor pitted cap and rotor will cause a miss and skip.
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If you could provide the actual P-codes for me... I may can find some slightly more technical directions.

 

2002 Chevy s10 2.2 throwing all these codes at once…
P0172, p0122, p0336, p0113, P0171