Set timing how do you set the timing on a 96 chevy 4wd v6 4.3 vor tech

Could be many things, but the MAF sensor is a common problem with these and is most likely the culprit.

check your catalytic converter or for a air leak I have a 96 chevy blazer that had the same problem but there was nothing wrong with my 4wd I had a intake leak and my catalytic convertor was clogged really bad

very common problem with chevy 4 wd switching in out of 4wd is the incriptor on the side of tranfer case goes bad.check for a tsb [tech service bullitin] you can google it will explain more detail

96 chevys have a ifs (independent front suspension) this give it more ground clearance but does not have lock out hubs, the cv axles go into the front differential an spin freely until you put it in 4wd, how this works is your transfercase spins the drive shaft that goes into the front differential an while you put it in 4wd it sends power to the actuator to lock the front differential. if your front end isnt pulling you either popped your 1 of your cv axles but if you did this you would know because it makes a very loud thunking noise while you're driving, my guess is you have a short thats not sending power to the actuator. check to see if the wiring harnesses are connected and check if the fuse that operates the 4wd in the cab of the truck is not blown. also actuators for these trucks are horrible they go out alot

I HAVE A 96 S10 LT BLAZER THE SYSTEM IS THE SAME THE WAY ITS WORKS IS ON ENGINE VACUUM A CABLE FROM A VACUUM ACTUATOR LOCATED UNDER THE BATTERY TRAY RUN TO THE SHFFT HOUSING THATS BOLTED TO THE FRONT CARRIER IT PULLS ON A SHAFT TO ENGAGE 4X4 THE PROBLEM IS THE CLIP THAT HOLDS THE CABLE TO THE SHAFT **** ITS NOT MUCH MORE THEN A PAPER CLIPI TOOK OFF MY SHIFT HOUSING BENT THE CLIP SO I WOULD ALWAYS WORK SEEING CHEVY WON;T SELL JUST THE CLIP WITH OUT THE CABLE I HAVEN;T HAD A PROBLEM SENCE

it could be a vacuum leak or the vacuum actuator and it is under your battery box.

it will be a straight line on the idle side of the pulley. that is the mark. you might need to clean it to see it.

we had this same problem, under the car there is a modular,near the transfer case, it just unlugs and plug a new one in.20 min.. it is approx. $80.00 item,$ 350.00 to have it done. we were in yellowstone when we had this problem. hope this helps

Transfer case module causes this, first disconnect battery then wait 1 min reconnect and try 4 high should work till you can get a trained tech to fix.