1993 CHEVROLET S10 BLAZER-WHEN DRIVING IDLE IS AT NORMAL SPEED. BUT, WHEN YOU COME TO STOP, IDLE IS HIGH. WHAT IS MY PROBLEM?

check out the advice in the link.

https://www.google.com/search?q=86+s10+2.5+reduce+idle+speed

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you probably have a short in the wiring to the tps somewhere, trace the wiring

Could be a vac leak, dirty throttle body, or faulty idle air control valve.
Is the check engine light on ?

have it put on a scanner its most likely your idle speed sensor

Adjust the idle though the throttle body at the top

only half way there if you have a tbi check the crank sensor/ cam sensor that is the first line of business on that truck if the crankshaft sensor fails the truck stops dead when you wait a few minutes the sensor re energizes and the truck will work again for a bit antiknock can cause similer problems but not while the truck is running

this sytem is shift on the fly!! you can engage and disengage from 2wd to 4wd at speeds up to 45-50mph, 4wd lo you need to be a complete stop some cars need to be in neutral with parking brake on and some need to be in gear there all different, consult your owner manual for correct shifting pattern to 4wd lo range

Well Boys
If I tell you how to fix the S10 Problem are you going to send me $10.00Regard.

Regards,

nothing ..normal low pressure at idle while hot ...but really should be thinking fresh oil change and filter soon..also what are the RPM's at idle hot in gear with A/C radio and other accessories running?

That is a very common problem with General Motors 700R4 transmission. There is a shell that encases the majority of the forward gears and the reverse drum is on top of it and that completely encases the forward drum. at the bottom of that shell there is a collar that is about one quarter of an inch long that rides on a gear set called planetarys. those have a problem with breaking and cause no reverse and driving in neutral. that is the link between the front and rear shaft of the transmission and the weak link. for that to be repaired it has to be removed from the truck and taken apart. It is highly recommended that it be completly rebuilt not just patched due to all of the metal that is sent through the transmission.