» » »

Mazda Q&A

Ask Your Question

2004 Mazda RX-8 Question: SSV valve diagnosis during repair of vehicle

 

Question

psychedshell, Owings Mills, MD, November 30, 2010, 11:25
 Rookie

My 2004 RX8 unfortunately ran over a tire tread lost by a car on the highway 2 weeks ago. Traveling at highway speeds, 9pm at night with traffic I was unable to avoid hitting the tread and ran completely over it. My car immediately made a hissing sound and I exited off beltway to a gas station to take a look. The entire spoiler was snapped in half, the air conditioner condenser was damaged and thankfully the bodyshop said that was it. However, while repairing my car, the check engine light came on and the bodyshop said a code came up whereby the throttle body flap was loose. I refused to pick up my car until engine light was off b/c I was having no problems before this incident. A mazda dealership has looked at it since and upon inspection "the tech found code P2070 SSV valve needs to be replaced to age and mileage of vehicle." My question is this-- Could the throttle body (buterfly flap)have become loose upon impact of hitting a tire tread head-on @ 60 mph? Any help and suggestions would be appreciated. Insurance company and bodyshop claim this problem is not a direct result of the accident. Thank you for your help.

2 Answers
Flag This
  • Medium-star Best Answer
    December 01, 2010, 08:35
     Master

    Here's what I wrote for the Common Problems database I've been working on:

    "RX-8s built before April 18, 2007 may experience check engine light on with code P2070 (Secondary Shutter Valve [SSV] stuck open). There will probably be a significant loss of power, and there's a Mazda bulletin associated with this problem . Seems to affect the A/T models more than manual trans models. The SSV is activated to open a secondary air intake tract which feeds the secondary intake ports when the secondary fuel injectors kick in at high RPM/high power application. The cause is carbon accumulation around the SSV shaft. It's possible the acutator or solenoid valve controlling it could fail too. There's a stronger actuator available from Mazda specified in the bulletin and decarbonizing the valve and area are required to free the valve. If your car's under warrantee, check out the Mazda dealer. I think that the SSV is subject to corrosion too if the situation is allowed to persist. To fix it properly, according to the bulletin, there's a lot of pieces you need to remove to get to the valve and manually clean it and the port it's in in the manifold. It looks like a few-hour procedure and you should get the updated actuator too, gaskets, etc. If you want to try to fix it without taking anything apart (or prevent it), try "Seafoam" fuel system cleaner (available at auto parts store) and use as directed. This may be a good preventative measure too. Now, this is a hot car with a lot of performance potential which is designed to be used. Probably the best way to prevent this problem (or cure it with the cleaner added) is to romp on it (rev it up!!) frequently, within the limits of the law and prudent behavior and get that valve open or at least commanded open to keep it or get it working. You will need a code scanner or a mechanic with one to clear the code. If the valve gets unstuck, you're golden but if not you need to get down and clean the valve and replace the actuator. You can find a copy of the bulletin on the internet.
    PS for all rotaries: Keep the engine oil clean and use good quality fuel. I recommend that all rotaries need to be warmed up fully once started (yes this is unusual for car engines) in order to prevent flooding on the next startup".

    What this means to me (and you) is that the problem was already happening and the collision was most likely coincidental to the P02070 malfunction.
    The 'throttle body flap being loose' does not sound accurate to me and I don't see how it could have happened from a minor collision. Also the P2070 code does not relate to the throttle body. If the butterfly valve in the throttle body came loose, the car would be undriveable, I think, and it would be a separate problem from the SSV code P2070, if the butterfly were actually loose.
    Here's a directory link for you:
    http://repairpal.com/directory?address=21117&car_brand_names=Mazda

    Flag This
  • Reply

    Visitor, February 03, 2011, 21:21

    Just happened across this website and read this reply. I will definitely second the line about revving the engine daily as rotaries have a tendency to accumulate carbon (more prevalent on the automatic as opposed to the manual). And by revving I mean that when it is driven it needs to be red-lined daily.

    Also will second the part about flooding. The fuel mixture is extremely rich upon start up and unless the engine is allowed to warm up the fuel can lag behind in the rotors upon shutdown. As a precaution on ours right before we shut it down it gets revved (about 4500 rpm) and the key is shutoff. This cuts the flow of fuel to the rotors and allows them to exhaust anything left inside. Somewhat common knowledge, but you never know.

    We love our RX8, one of the funnest cars to drive I have ever owned.

    Reply
    Flag This
  • Answer #2

    Visitor, May 24, 2011, 08:53

    I HAVE PROBLEM MY MAZDA 2004 RX8 SSV STUCK OPEN AND
    AIR SOLENOID VALVE CONTROL CIRCUIT LOW
    CAN YOU HELP ME PLEASE

    Reply
    Flag This