Has a new tune-up, but still stalls idail low

Could be dirty throttle body or needs tune up.fuel filter,air filter.

It can be low fuel pressure issue or clogged fuel pump. Or its engine related issues,---------------
Check the help link mentioned below to troubleshoot the problem: ------

Engine stalls, car stalls while starting, vehicle stalls while starting, Engine stalls and dies, Car stalls and stops,
http://alltypesofpartsreplacing.blogspot.com/2012/12/engine-stallscar-stalls-while.html

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These will help.
Thanks.

Tune-up?

You realize tune-ups ended 25 years ago

They only install spark plugs,there hasn't been
any tuning in decades,that is what the cars computer
sort of does.

Find a more honest shop

ENGINE STALL WHILE DRIVING COULD BE STOPPED UP FUEL FILTER OR FAULTY FUEL PUMP.IDLE SPEED TOO LOW.OR IGNITION COIL HAS A LOOSE ELECTRICAL CONNECTION.FAULTY IGNITION MODULE.BAD PLUGS AND WIRES. I WOULD DO A LITTLE TUNE UP.CHANGE FUEL FILTER AND AIR FILTER.IF SPARK PLUGS AND WIRES HAS OVER 30000 MILES ON THEM I WOULD CHANGE THEM.ALSO FUEL FILTER IF OVER 30000 MILES.CHANGE IT CLEAN FUEL INJECTORS. TO TROUBLE SHOOT CAR I WILL DO A LITTLE TUNE UP FIRST TO MAKE EVERYTHING TOP NOTCH ON THE ENGINE BEFORE I GO TO NEXT LEVEL.BUYING NEW PARTS DONT NEED.GET VECHICLE SCANNED WITH A SCANNER. THAT WILL ALSO PIN POINT PROBLEM QUICKLY.BUT DO THE LITTLE TUNE UP FIRST IF EVERYTHING PAST 30000 MILES MARK.SCAN VECHICLE FOR FAULTY IDLE SPEED CODES OR FAULTY IGNITION MODULE CODE THEY WILL COST MORE MONEY TO FIX.PARTS HIGH.

could be an airleak in the pipe from the inlet manifold to the brake vacuum reservoir.not uncommon..

spark plug cable is lose or one spark plug is faulty.

change your distrubutor cap and points..... they are probably worn if you didnt do that at the same time... your code read is too new as your truck is OBD I and make sure your distrubutor isnt wet as this will casue stalling (i just added that in assuming you washed your engine bay in your 'tune up" )

Just to let you all know it ended up being the CENSOR in the trany that was bad.

when cars idle super low this ussually mean that you fuel filter is clogged.........change the fuel filter.......and if that does not help.....check the air filter.......if dirty change it.......and if that still does not help......check the o2 sensor......and if that does not work......"when was the last time you had a tune up on your car"?

you might need new plugs...........also try runing a fuel injector cleaner....sometimes it is because the injec are dirty......

With my personal experience that I have in all the vehicles with similar problems the solution is the same. Transmission tune-up believe me, the fluid is low or the filter is clogged and the fluid has lost its lubricity that's all. Do not get convinced you need a new transmission or some other sensor. Its more economic to give it a tune-up before assuming anything else is wrong with the vehicle. Check my advice on a trans tune-up. If you already replaced sensors and messed with whatever else once you do the tune-up it might not be as new. Because things that affect the transmission were tampered with. But after the tune-up you will be able to drive it with no worries. First off all check the trans fluid level, if low find the leak, repair it if any then do the tune-up. If the fluid is low and you find red oil underneath the radiator, engine or transmission let me know.