TPI plenum holes
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Racer
Joined: Oct 2004
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From: Mukilteo Washington
Safety Car
Joined: Jan 2004
Posts: 3,783
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From: Northern California
On my "91" Vette, directly under the MAP sensor, there is a recessed area on the plenum that has a screw in adapter for the plastic vacuum line that connects right to the top of the fuel pressure regulator.
Last edited by GKK; Dec 6, 2007 at 11:01 AM.
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
The 90-91 L98 Vettes are speed density and have a MAP sensor covering the three vacuum ports. All three vacuum ports are used. Here's a few pictures of my 91.
Here you can see the three vacuum ports. The one on the left connects to the bottom of the MAP sensor, the middle line connects to the fuel pressure reg and the one on the right connects to a hose near the back of the drivers side valve cover.
Here you can see the three vacuum ports. The one on the left connects to the bottom of the MAP sensor, the middle line connects to the fuel pressure reg and the one on the right connects to a hose near the back of the drivers side valve cover.
Last edited by GKK; Dec 6, 2007 at 04:10 PM.
Thread Starter
Racer
Joined: Oct 2004
Posts: 439
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From: Mukilteo Washington
[QUOTE= the one on the right connects to a hose near the back of the drivers side valve cover
That's the one I'm trying to figure out. Is this going into the valve cover for PCV our CCV ? Thanks
That's the one I'm trying to figure out. Is this going into the valve cover for PCV our CCV ? Thanks
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Thread Starter
Racer
Joined: Oct 2004
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From: Mukilteo Washington
Burning Brakes
Joined: Oct 2004
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From: Pearland Texas
[QUOTE=77 vette;1563060605][QUOTE= the one on the right connects to a hose near the back of the drivers side valve cover
That's the one I'm trying to figure out. Is this going into the valve cover for PCV our CCV ? Thanks[/QUOTE]
That hose go around and connects to a junction, union, tee (whatever its called) . Then from there, I think, it heads to the can in front. See attached.
That's the one I'm trying to figure out. Is this going into the valve cover for PCV our CCV ? Thanks[/QUOTE]
That hose go around and connects to a junction, union, tee (whatever its called) . Then from there, I think, it heads to the can in front. See attached.
