hi all.
i have problem with JDM F22B DOHC, in Accord CD3 (similar CD5)
When the engine will get warm, idle running starts to grow slowly, approximately on 50 rpm and is sharply dumped approximately to 700 rpm.

Grows approximately for 15 seconds.
If I press on gas turns exactly to keep.

ps: i replace: spark plugs, wires, cap, oil, disable and enable IAC, tps is 0.49


WHERE PROBLEM???

 

up

 

Dirty throttle body or maybe the TPS sensor.

 

tb is clean, becouse installed OIL CATCH.
i set TPS on 0.45, 0.49, 0.50, 0.68

it's nothing

 

check your pcv system, sometimes an unmetered leak into the intake might cause high idle.

 

If there is a leak in your catch can/PCV system, or it is vented directly to the outside air. This can cause a fluctuating idle as well. The oil catch can system needs to be a closed system if you are using the manifold PVC vacuum port. After you installed the oil catch can did you reset your ECU?

 

Mine does the same thing occasionally ...

I don't know what causes it, but if you find out let me know.

 

ok, i try remove oil catch tank or close

 

Mine is starting to do the same, I'm told that it's the IM gasket that is going bad?

 

Yes, It could also be a deteriorating gasket or cracked vacuum hose as well. It could also be contributed to a low coolant level or bad IACV or FITV.

If you want to check your intake manifold and throttle body gaskets there is a trick you can do. With your car running, Use a spray can of throttle body or carb cleaner and carefully spray it around every gasket and hose connection. If you hear a drop, or change, in the idle rpm. That would indicate a leak in the gasket, or hose, where you just sprayed the cleaner.

 

Yup thats how they found the leak in the gasket
.

 

i find the probleme.
the pipes was hushed up

 

mines did that, replaced the fuel filter and pcv valve and idle was back to normal.