Vacuum Line Q

skiwesser11 · Jul 3, 2014

On a 5.0 efi how many vacuum lines come off of upper intake, sans anything emissions related.
Installing RPM 2 and trying to clean up engine bay as much as possible.
Any tips in that area appreciated as well, got the wiring looking pretty good and simplified. Moved crane Hi-6 box inside car, loomed a lot of stuff together ect. Re taped pretty much entire harness.

mikestang63 · Jul 3, 2014

skiwesser11 · Jul 13, 2014

So we need one coming from front to canister, one to PVC, vac manifold, and fpr, that's all that's necessary I think. Can I use the two opposite each other near throttle body for purge and fuel press? I'm not sure vacuum is the same at that point in intake?? (Although I do believe fpr was connected there at throat of previous intake) which sadly was a pp typhoon.

mikestang63 · Jul 13, 2014

skiwesser11 said:
So we need one coming from front to canister, one to PVC, vac manifold, and fpr, that's all that's necessary I think. Can I use the two opposite each other near throttle body for purge and fuel press? I'm not sure vacuum is the same at that point in intake?? (Although I do believe fpr was connected there at throat of previous intake) which sadly was a pp typhoon.

No- the two lines on the TB are not vacuum- they are for the EGR coolant. Follow the diagram I posted

skiwesser11 · Jul 13, 2014

No, I'm not speaking of the coolant connections on egr, they are long gone. I'm talking about the threaded vac ports in neck of rpm 2 upper, just beyond the tb and egr. Should be same vac there as in plenum from what I can find. Just concerned that I might need to have them more down stream, still might be to close to throttle blade but I think physics should be same drop when blade opens there as it is past "throat" of upper.
Thanks for diagram!

Vacuum Line Q

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mikestang63

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