How do I troubleshoot my 89 s10 can I do the code thing with the paperclip what are the steps

yes all S10 trucks should have the same fuse box if the year is the same.

They will bolt up. You may want to get the wiring plugs off the 97 t case as they will be different from yours. Or use your old t case

I disagree with blood has nothing to do with injectors or fuel pump in 99% of all cases of this problem and is a very costly mistake to replace those things only to end up with only a $15 egr problem.

It is usually a faulty/bad EGR valve which is a very commonly known thing when it comes to s10's they were notorious for stalling and hesitation issues due to bad egr's from 89-94.

Adjust the idle though the throttle body at the top

Should be under the hood, on the firewall, above left front wheel.

It's not worth doing all that conversion, buy the time you spend the time and money to convert the 89 4.3 to work on the 98 blazer, it would be cheaper to install a 98 vortec rebuild. The 89 4.3 have a TBI fuel injection system and the ecm on the 98 will not work and the bad news is that the ecm on the 98 also controls the transmission shift points and the 89 will not, so even if you swap the ecm to have the 89 4.3 engine work. the transmission will not shift. Sorry for the bad news but it would be cheaper to replace the 98 engine with the years of 1996 to 2001. Good luck and hope this helps. 

If it has a carberater.The flots are probley sticking

you must have not connected a ground wire when you put the pump back on.

hammer and prybar

have someone check the starter/solenoid