Shran
Junk Collector
TRS Forum Moderator
Supporting Member
Article Contributor
V8 Engine Swap
Solid Axle Swap
Truck of Month
- Joined
- Mar 4, 2008
- Messages
- 8,984
- Reaction score
- 5,264
- Location
- Rapid City SD
- Engine Type
- V8
- Engine Size
- 5.0
I would probably do some probing around to check voltages at your TPS and see if someone messed with the throttle stop, in addition to making sure your IAC is functional.
I have had weird issues with vehicles that have sat for a while that I think I can attribute to injectors gummed up with old fuel. My wife's '87 did that, even after a fresh tank/pump/filter/fuel... the idle would fluctuate between barely running and 1000+ RPM. I just let it sit and run for quite a while and it eventually cleared up and runs great now. My V8 truck did something similar when I pulled it out of storage after 2 years last week too. Maybe yours just needs some run time on it to get the blood flowing.
I have had weird issues with vehicles that have sat for a while that I think I can attribute to injectors gummed up with old fuel. My wife's '87 did that, even after a fresh tank/pump/filter/fuel... the idle would fluctuate between barely running and 1000+ RPM. I just let it sit and run for quite a while and it eventually cleared up and runs great now. My V8 truck did something similar when I pulled it out of storage after 2 years last week too. Maybe yours just needs some run time on it to get the blood flowing.