Are you using the stock RCV solenoid? The stock one may not provide the response and air volume needed to actuate the aftermarket BOV. I use a Pierburg solenoid from N75 Motorsports.
Posts by Hamster-GT
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It's on the intercooler pipe. Just follow the vacuum line from the BOV and it will lead you to it.
From what I learned from the other 1.6T platforms by sifting through their forums, the stock RCV solenoid with an aftermarket BOV usually causes CEL P2261.
Majority of the aftermarket BOV are "push" type, meaning the valve is pushed open by boost in the intercooler pipe. So fine tuning is needed either by spring preload or stiffer spring swap with a combination with something like a Pierburg to assist with air volume. The "pull" types have the boost pressure holding the valve closed until there is a difference between pressure from the intake manifold and the intercooler pipe. They typically can get away with a softer spring with no adjustments. Push types are popular due to the quick reaction for those who want to vent to atmosphere.
Majority will have problems without the Pierburg. I never had a problem with mine in both push or pull configuration. I just swapped mine just to have a more reliable solenoid after seeing problems even with the stock BOV.
Is your Corolla 2 door or 4 door? What engine?
Looks great! Are you running the 6 speed as well? Open ITBs in a 20 valve is glorious.
Here's one of my old projects. 1985 Corolla GTS. 16v with HKS sport cams.
Right? You get junk for $6k. I bought this one back in 95 when no one wanted them and bought for $1500. Those days are long gone.
Aftermarket valves are push type BOV (except HKS SSQV) so boost from the intercooler pipe and vacuum from the intake manifold help open the valve. If the spring is too soft and/or not enough preload, boost will leak out, especially on boost and load. Regardless of vent to atmosphere or recirc, if the valve doesn't fully close on load you will get a CEL. The stock valve is a pull type, so boost in the intercooler pipe and pressure from the intake manifold help hold the valve shut on boost and load. The stock rcv solenoid is designed for the stock BOV. It doesn't need the extra volume an aftermarket solenoid provides. Push type typically need more spring stiffness and/or more preload set. You might be able to get away with just adjusting the preload, if it has one.Back to BOV issues.
So the more I read about Hyundai/Kia throwing the p2261 I seem to find three common things, 6spd and vented to atmosphere and sometimes age 2-4ys old. Makes me think the factory BOV solenoid gets tired faster in the 6spd cars and fails more often. If an aftermarket BOV is added to a couple year old 6spd car it is more than the solenoid can take and instant cel. Not sure what the venting to atmosphere has to do with it if anything. Maybe the slight vacuum in the intake tract helps the BOV vent when the recirc tube is hooked up?
There is. I'm not sure about the newer iterations of the stock bov, but the older triangle shaped versions did leak some boost, and even more so when the boost level is raised higher than stock. The older stock BOV were push type BOV with a soft rubber diaphragm which gets worse as they age and heat cycle. Some power can be gained just by replacing them with an aftermarket one. Also, drivability and transient response can improved, too.
That can be done with some fine tuning of the preload on the spring. It's too bad the BOV is mounted below.
I would start adjusting preload on the BOV. Are you venting to atmosphere?
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