2006 Type S with P2279 and P0507 DTCs

DJS_05_RSX-S · Feb 24, 2019

I have a 2006 RSX-S that I bought a while ago with an overheated engine. Well, everything was warped from the previous owner continuing to drive it as it overheated, so I just kept some of the bolt ons and junked the old motor.

I came across a K20A2 bottom and and a K20Z1 top end, separately for sale, so I picked them up. I freshened up both the head and the block with all OEM parts and dropped it in.

I dealt with DTC P0341 for a while until I went ahead and bought a new OEM VTC actuator and re-timed the motor. Well, now I have 2 more DTCs - P2279 and P0507. I understand that both can be the cause of a vacuum leak, so I went ahead and built a smoke tester today.

I was really excited to find my leak and finally get to drive my car until I put the smoke into the motor and didn’t see it leaking out anywhere. I also tried doing the idle relearn procedure with no luck. The car idles just below 2,000 RPMs and doesn’t ever go down to normal. It’ll also idle hunt every once in a while, but it’s not constant.

Any ideas as to what I can do next? This car is going to end up putting me over the edge!

Thanks in advance!

- DJ

marko16 · Feb 24, 2019

Hows the brakes, the booster can leak.

DJS_05_RSX-S · Feb 24, 2019

They seem to be okay, but I’d be lying if I told you that I’ve driven it on the road since rebuild.

marko16 · Feb 24, 2019

This is from the manual. You take off the intake and there are two ports as you look in.

6. Put your fingers on the lower port (A) in the throttle body.
A
Does the engine speed drop below 700 1 (750) 2 rpm?
YES-Check the idle speed with a different load condition (electrical, A/C, gear position, P/S etc.) (see page 11-348). If it’s out of specification, replace the IAC valve (see page 11-412).
NO-Check for vacuum leaks at these parts.
• PCV valve
• PCV hose
• EVAP canister purge valve
• Throttle body
• Intake manifold
• Brake booster hose
• Intake air bypass control thermal valve

I've never smoke tested, but spraying those parts with some carb clean will cause th motor to change as it gets sucked in. Not sure how to post the pics from manual.

DJS_05_RSX-S · Feb 24, 2019

I appreciate the info! If the linked manual still worked on my phone, I’d be digging through it at work right now, but unfortunately it doesn’t.

I figured smoke testing would be the easiest way since you could visually see the leak. I may have to do the propane test instead since I’ve already kind of tried carb cleaner.

2006 Type S with P2279 and P0507 DTCs

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