1997 1FZ Hiccupy idle and running rich (6 Viewers)

[Indiana80]

Mine was done 60K miles ago, but probably not a bad idea. I really should get some fuel pressure readings anyhow.

Also, the throttle body butterfly looked carboned up and the IAC has never been off the TB from what I can tell, so I am going to remove the whole assembly, partially disassemble, clean, etc.

Did you ever resolve this issue?

 

[redfalcon302]

Was this ever resolved?

 

[logicbyondreaso]

I had an 80 that did similar and changing the spark plugs, wires, and cap/rotor resolved it.

 

[Indiana80]

Was this ever resolved?

I’d guess the OP gave up on chasing the ghost and sold the rig. Some of these old trucks just don’t have a perfect idle. It’s not a perfect world.