intake manifold valve

scottie0330 · 02-04-2010, 10:18 PM

Hello .i just got a 04 rx8 and already in love.however i know nothing about the motor yet.the light came on and i had it teasted and it said the intake manifold valve was stuck open.can anyone tell me if this is a major problem and what to do about it. thanks

Tech B · 02-11-2010, 02:53 AM

The valve in question controls the use of your variable intake manifold. As you move into higher loads/rpms, the intake manifold uses a valve to close one set of runners more efficient for low end and opens a better breathing set for high rpm. Generally the cause is debris buildup inside the manifold.

scottie0330 · 02-11-2010, 09:04 PM

thanks for replying.this would probley have something to do with me getting terrible gas milage right?im trying to figure this out without going to the costly dealership.is thir a way to clean it?i was told the you wassnt suppose the run the gumout fuelsystem cleaner in rx8's

reaper · 02-26-2010, 12:35 AM

i could see this causeing lower gas mileage.
i would check for vac leaks first. then i would move to defective equipment (something is proly broken) then i would clean it with something.
G.L. with the fix, keep us updated

02-04-2010, 10:18 PM	#1
scottie0330 The Newbie Join Date: Feb 2010 Location: Alabama Posts: 4 Rep Power: 0	intake manifold valve Hello .i just got a 04 rx8 and already in love.however i know nothing about the motor yet.the light came on and i had it teasted and it said the intake manifold valve was stuck open.can anyone tell me if this is a major problem and what to do about it. thanks

02-26-2010, 12:35 AM	#4
reaper 2slow4u Join Date: Dec 2009 Location: Las Vegas Posts: 18 Rep Power: 0	i could see this causeing lower gas mileage. i would check for vac leaks first. then i would move to defective equipment (something is proly broken) then i would clean it with something. G.L. with the fix, keep us updated __________________ my hoarse is amazing sincityrotary.com a place for las vegas rotary enthusiasts

02-11-2010, 02:53 AM	#2
Tech B The Newbie Join Date: Dec 2009 Posts: 20 Rep Power: 0	The valve in question controls the use of your variable intake manifold. As you move into higher loads/rpms, the intake manifold uses a valve to close one set of runners more efficient for low end and opens a better breathing set for high rpm. Generally the cause is debris buildup inside the manifold.

02-11-2010, 09:04 PM	#3
scottie0330 The Newbie Join Date: Feb 2010 Location: Alabama Posts: 4 Rep Power: 0	thanks for replying.this would probley have something to do with me getting terrible gas milage right?im trying to figure this out without going to the costly dealership.is thir a way to clean it?i was told the you wassnt suppose the run the gumout fuelsystem cleaner in rx8's