1Lexus ES 400 Throttle Body (2) Butterfly Valves ?

[DrivewayAl]

Hey guys, have this 1993 lexus ES 400 4.0L, that is bogging down at work. Lacking power. When I took off the snorkel to change out the plugs I noticed there were 2 butterfly valves. The 1st one is wide open and the 2nd further in is closed position. Is this normal positioning? Thanks for any help.

Drivewayal

Topic

[college man]

Driveway. I can’t find anything with two butterfly valves.
can you take a picture and post. Is the butterfly hooked to
anything?

[college man]

I think I found something. The first plate is spring loaded open
and the far plate is spring load closed.The plates maybe dirty.

http://www.lextreme.com/tb.htm

[DrivewayAl]

Yeah, that’s what I thought. It just seemed odd that the 1st plate would be loaded in the open position. Worked on car today only for about 15min. I will try and take picture but I am not due back in work until tues. Maybe then I will chk. the engine compression. Thx.
Driveway Al

[Author]

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