I have a rebuilt motor just installed the truck runs warm hesitates and surges will even quit running. also idels rough

jshuffman: Believe it or not your ignition module (located behind the coil packs) could be the problem. If your cooloing fans are not working either, this is the culprit. The worst part is that it won't always show a code on the old obd 1 systems. This module controls more than you think along with the computer on this type of car. Good luck. Hope this helps. P.S. Air conditioning will quit working too.

Have you replaced the fuel filter? That may be the culprit.

Back firing is usually an indication of a timing issue

The timing chain is most likely worn & jumped a couple
of teeth or the distributor was installed wrong,if you recently
had work done

sounds like a vaccum line or once again tps/poss timeing off

check the Idle Stop Solenoid

black soot is a running rich condition it's getting to much gas not enough air .. 14-1 ratio air to gas your carb rebuild needs to be rechecked for sticking float..

Ok, you got new 02 sensors, that is good, Now check timing, vacuum hoses for leaks, check for headgasket leak with compression test, Check or change fuel filter and plug wires. If fuel injected, try using injector cleaner and you can also remove one injector at a time to make sure it is not leaking or plugged. You can also test throttle position sensor and idle position sensor with an ohmmeter to see if they are good.

Vacume leak or bad idle motor. With the car in park and running with the hood open listen for leaks moving your hand around the different hoses looking for a change in the sounds that you hear. The idel motor also makes the car idel up to 1500 RPM or so right at start-up then idel down, If it doesn;t the idel motor is likly. Check engine light is on when running? Test for codes, Follow code test charts don't skip any steps!.

if u have a damaged plug it can be running on 1 less cylinder ,it will idle very rough,change it!

sounds like dirty injectors......