Honda D Series Forum banner
1 - 2 of 2 Posts

·
Registered
Joined
·
9,982 Posts
If you want to fix it, quit throwing moeny at it.

P0505 means idle performance is not as intended, to simplify it.

At any point did you remove the idle adjustment screw, clean it AND the passage, make sure the Oring was good, and re-install?

At any point did you simply bridge the service connector and do an idle relearn and setting?

Did you verify you have zero vacuum leaks?
 

·
Registered
Joined
·
9,982 Posts
If repalcing the gasket does not fix it, if you have one of those old school squirter oil cans, you can have the intake tubing off the throttlebody, and squirt a little oil on the throttle blade's shaft inside, and if it lowers the idle, the actual throttle's shaft is leaking.

Solution is a different throttlebody. I have run into this exactly twice in 20 years. But it is indeed possible.
 
1 - 2 of 2 Posts
Top