Ive searched on here about this problem but I cant seem to pin point my 99 blazer problem. Its been happening intermittently but now it does it all the time. The truck will start and crank over but as soon as it goes to idle it stalls. I cant keep the thing running at all. Any help would be greatly appreciated. I also dont know if this is a factor but I just changed the oil in it. It was working fine before that.

 

The common sensor problem i've seen that causes this is the Mass Air Flow sensor(MAF) this sensor is located in the intake system over by the air filter. Back Probe it with a DMM and see if the values are withing acceptable ranges (will hav to look them up)

 

Wouldnt this cause a code? I know I have dealt with the MAF in a previous car and it threw codes up like a christmas tree when it wasnt running properly. I have no codes coming up.

 

Not necessarily. The MAF sensor can be operating properly as far as the PCM is concerned, but still not feeding it the proper information that it needs to properly operate the engine.

It's easy enough to clean with the information available in the how-to located in the Tech Article (DIY) section.