engine cutting out??

[MUDDING B-3000]

so this morning i started my truck up to leave for work an i usually just let it run for a couple minutes before i leave an the truck was idling a lil high 1100 - 1200 then suddenly it droped to 700 then 500 then cut out? started back up fine an drove fine all the way to work. then leaving work did the same thing but i gave it gas to keep it goin then it would idle fine at 700 then drop out again it did this 3-4 times, but it doesnt die out when i drive but it idles at like 1500- 1700 when i come to a stop?

by the way the truck is a 94 b3000 3 L 4x4

 

[MUDDING B-3000]

i replaced that about 5 months ago, but how do i check it to make sure its workin propertly

 

[jml32788]

i replaced that about 5 months ago, but how do i check it to make sure its workin propertly

You can start the truck and let it idle then unplug the IAC valve. If the RPMs drop then its working. If not its gone bad.

Could be a vacum leak as well

 

[MUDDING B-3000]

ok ya i unpluged it an the rpms drops really low. so thats workings, i check all the vacuum lines an the ones that had junky clamps i fix. an it seems to be better now hasnt stalled out today or yesterday so i must be fixed.

 

[funkingonutz]

ha ha i unplug my IAC and the RPM's climb.........?????