Sometimes dies when slowing down..
This is a long running problem and I think there are two other threads I've started and got no where with 2 and 3 years ago. But I really would appreciate any suggestion you think may help.
Not all the time, but lets say 3-5% of the time, if I'm accelerating as you would from a normal stoplight speed, and then let off the gas, or even if going roughly 40mph you just let off the gas, the rpms drop and bounce around 600/500/400/300 until dies. Not fun having 305's with no power steering and brakes while in traffic.
Normal operation happens the rest of the time, in that the RPM's slowly fall to 1000/11000 and then more slowly fall to 800/850 as the final idle speed.
So far I've checked all the vacuum lines, ran a smoke test looking for vacuum leas, checked grounds and all connections, and replaced the idle speed motor and the EGR valve. It used to do it more, but changing the EGR valve helped it not happen as often.
Anyone have any ideas?
Sent using a computer..