Well, i don't know howto explain this. But there are 2 vacuum hoses on my plenum, 1 for the FPR and 1 for EGR? well, the one i think that's for the EGR goes to a 3 port ball looking thingy. Well the stem broke on me and i replaced it with a regular old vacuum diverted from an old carbed car (3 port). Was that ball thingy something special? would it cause my car to idle incorrectly without it?

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR

 

If I'm guessing correctly, you must have CC.

The "ball thingy" is just a check valve for the cruise control so the vac. won't bleed off while vac. drops.

Just a regular "T" will work, but the correct one at chevy is about $5.00.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
My favorite quote about D.E. "He can see air"

 

Branz,

The vacuum line to the EGR solenoid also serves the EVAP canister. Unfortunately, the source for this vacuum is at the underside of the throttle body. There are two hose bibbs on the right side of the plenum. One is for the FPR. The second is for the HVAC controls. It may route through a check valve or limiter, but can be routed directly.



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Later,
Vader
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"I'm'a do Things My Way - It's My way or the Highway."
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