Vacuum leak through missing TB bolt?
#1
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Vacuum leak through missing TB bolt?
This may be a REALLY DUMB question, but sadly I just don't know the answer. I do have some theories but I'm not sure ... so here goes.
While looking head-on at the throttle body in my 2004 MSM, I noticed that the bottom right of the four bolts (holding the TB to the intake manifold) is missing. If the other three are tight, would there be a vacuum leak?
Either way, I intend to replace the bolt. Does anyone know exactly what kind I need to get? Is that something I'd find in the hardware aisle at Home Depot?
While looking head-on at the throttle body in my 2004 MSM, I noticed that the bottom right of the four bolts (holding the TB to the intake manifold) is missing. If the other three are tight, would there be a vacuum leak?
Either way, I intend to replace the bolt. Does anyone know exactly what kind I need to get? Is that something I'd find in the hardware aisle at Home Depot?
Last edited by evank; 11-19-2012 at 10:55 PM.
#3
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I think there might be. Here's what happens (running on the suck-*** stock ECU): when I go into boost / closed loop, AFR is a safe 11/12-ish for most of the powerband, but then it pegs at 10.0 up near redline. Obviously I back off to prevent any damage. So my theory is maybe the missing bolt causes a slight leak which only manifests itself under high pressure (even though it's on the intake side, not the output side?)
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Mikel
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09-28-2015 04:46 PM