1996 Honda Accord poor idle and oil light
RPMs go below normal and oil light
comes on. The oil is topped and the
spark plugs are new so I don't know
what is happening, do I need a new IAC
or oil pump?
A dirty Idle Air Control Valve will cause idle speed reduction; as will a vacuum leak..... Oil pressure is somewhat dependent on engine speed. If the idle runs low, the oil pump isn't pushing as hard as it does at normal idle. Your problem is very likely the dirty IAC.
Is there a proper way to clean it? I assume I should stay from strong solvents that way degrade seals
Here's a shortcut to an explanation: https://www.yourmechanic.com/article/how-to-clean-an-idle-air-control-valve-by-joyce-morse
So, I cleaned the IAC and that didn't fix the issue so I decided to look further. I ended up getting a vacuum and sucking everything inside the valve and the IAC ports, sucking inside the harness and connector port in IAC motor as well as I cleaned the EGR ports and passages and the car seems to have improved. It starts up easily and I accelerate after warming up and it smoothly goes back to proper idle instead of below. I also applied a bit of silicone spray in the right port of the IAC, there seems to be a screw looking thing there, I guess that's what the motor uses to open and close? A bit of lube seems to have helped.
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