73-87 Chevy _ GMC Trucks > Fuel Systems and Drivability

Q-Jet Question

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JJSZABO:
Sorry if this was asked before, but I am going to throw it out again.  Please look at the following pictures and let me know where the vacuum lines go.  I have a Q-jet M4ME on a 350.  Its for a 1986 C-10.  I will be hooking up the EGR valve and vacuum canister with Cats.

Thanks for your input.





Thanks for the help.

Jeff

VileZambonie:
You can cap all the ones you don't need. Yes the bottom biggie goes to your PCV valce. The large vent goes to your cannister. You can put either the lower front port or mid (ported) port to your vacuum advance on your distributor. Basically put it to whichever one gives you the better desired idle quality based on your engine combinations. The ported vacuum port is located above the throttle plate so it only gets a vacuum signal when the throttle opens. You can use this one for your EGR

yttaf:
what is the nipple in the back by where the brake booster screws in?

JJSZABO:
Thanks Vile - that's exactlly what I was looking for.

Jeff

JJSZABO:
Here is how I plan on running my lines (they correspond with the marking on my Q-Jet - but not in order):




What do you think?

Jeff

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