Ok, so I drive a '92 S10 truck. it has a 2.8 v-6 in it and i've had it for about 5 years. It had been running kind of crappy and my friend showed me a way to check the computer without having to take it into the shop. You stick a wire in the terminal plug-in right underneath the steering collumn and the "check engine soon" light will blink. depending on how fast and how many times that light blinks you will get a number. my came out to be 43, you check this number on the internet and it said that i had a problem with my sparkplugs, cap, rotor, and/or wires. well it had been awhile since any of those had been changed so i decided to replace everything.
I got the right stuff and did it myself, i must say getting the old wires out was a pain in the ****. So i finally got everything replaced, and i know for sure that i got the right order on the cap, but it still runs like it did before, and i keep getting the same number when i run the test. my friend thinks it is because i didn't get the wires back to their original position. Any help?

 

I does not matter if you change the problems that it is giving you. You have to reset the computer. It is a pain, you can not listen to the computer they will give you errors if the gas cap is not on write.

 

hello gearhead, i would suggest a FREE scan with a obd2 scanner from autozone-pepboys-advance-
etc, just tell them your sevice ligh is on, obd2 gives a very accurate reading and some advance stores can give you a printout of the coads. the haynes manual gives you a listing of what the coads are a majority of time, i'v seen a few rare casses of unfound coads. a crappy running engine could be many
things -bad o2 sensor-clogged or dirty fuel filter- map sensor-fuel pressure regulator and so on,
i would also suggest the haynes manual,very helpful for DIYers.

 

1992 vehichles don't have OBD2 ... they have OBD1 ... completely different.

 

yep, my oversight thay are different...obd1... not... obd2... as long as you get the free scan.
good luck with the truck.