Long story short, I found that my ACTS had been left out of the
airbox. I found it under the airbox, and it looked kind of beat up.
I replaced it, and the truck idled normaly for 2 days. But then it
began doing the high idle to 1500 rpms for 65 seconds, then normal for
the rest of the day. It seemed to be running better, though.
Yesterday, after a 2 hour workout in the gym, it started normally, but
as I drove away I could feel the motor run a bit rough, and the CEL
light came on. Using my new code reader, 332 was stored. 332-
Insufficient EGR flow detected.
Using my Haynes manual (which never seems to show the equipment on my
California truck), I checked the voltage to the EVP, and it was
4.9volts. I then disconnected the vacuum tube on the top the the EGR,
hooked a length of vinyl tubing to it and sucked the air from it. I
could hear the diaphram moving in the EGR.
I'm kind of stuck on what this might mean.