The car in question is an 86 Trans Am. We just finished a cam swap and I can't figure out where some of the lines go.
First, the PCV system. The driver's side (with the valve) is hooked up correctly. The passenger's side currently has a breather filter in it because I couldn't figure out how to hook it up. It looks as though it comes from the hole in the valve cover, and then mates with the metal pipe running from front to back along the intake. That pipe dumps up near the throttle body and I don't know which connector it goes to.
Second, the evap canister. I've got two vacuum lines coming off of it that don't have a home. One is labeled control vacuum and the other is labeled manifold vacuum. Where do they go?
Third, the AIR system. I haven't got the divert-valve assembly back on yet--does it have any vacuum controls on this year or is it purely electrical?
First, the PCV system. The driver's side (with the valve) is hooked up correctly. The passenger's side currently has a breather filter in it because I couldn't figure out how to hook it up. It looks as though it comes from the hole in the valve cover, and then mates with the metal pipe running from front to back along the intake. That pipe dumps up near the throttle body and I don't know which connector it goes to.
Second, the evap canister. I've got two vacuum lines coming off of it that don't have a home. One is labeled control vacuum and the other is labeled manifold vacuum. Where do they go?
Third, the AIR system. I haven't got the divert-valve assembly back on yet--does it have any vacuum controls on this year or is it purely electrical?
The AIR has no vacuum lines, just electric stuff.
The breather has 2 metal tubes. It has a rubber 90 that attaches to the valve cover, one metal tube with about a 30 degree bend in it and about 3" long, another rubber 90 bend, then the long tube on the intake, and then a piece of I think 3/8" oil resistant hose that hooks up to the larger of the 2 fittings on the throttle body.
The evap hooks up to the other fitting on the throttle body, the smaller one below the breather pipe. Its the larger of the 2 hoses coming from the evap. There should be a step up fitting near the TB end, pretty sure that goes from 3/16"ID to 5/16"ID. The vacuum source hooks up to a y that is in the line that runs from the ported vacuum on the bottom driver side of the TB and runs to the EGR solenoid.
The breather has 2 metal tubes. It has a rubber 90 that attaches to the valve cover, one metal tube with about a 30 degree bend in it and about 3" long, another rubber 90 bend, then the long tube on the intake, and then a piece of I think 3/8" oil resistant hose that hooks up to the larger of the 2 fittings on the throttle body.
The evap hooks up to the other fitting on the throttle body, the smaller one below the breather pipe. Its the larger of the 2 hoses coming from the evap. There should be a step up fitting near the TB end, pretty sure that goes from 3/16"ID to 5/16"ID. The vacuum source hooks up to a y that is in the line that runs from the ported vacuum on the bottom driver side of the TB and runs to the EGR solenoid.
Hawk,
You cannot use a breather for the PCV vent, or the MAF will not sense the incoming air (you'll run lean for sure).
Hopefully these will help:
And the CCV tube routing:
You cannot use a breather for the PCV vent, or the MAF will not sense the incoming air (you'll run lean for sure).
Hopefully these will help:
And the CCV tube routing:
Thank you much, guys, that should do it.
As far as the breather, it was either stick a breather filter in the hole or leave it open--I opted for the breather. When the heater core hose blew off under pressure 2 minutes later and hosed the passenger's side of the motor down with coolant, I think the breather was the right choice. Getting a bunch of coolant in the oil would have been worse than running lean.
By the way, the heater hose blew off because we forgot to clamp it down.
As far as the breather, it was either stick a breather filter in the hole or leave it open--I opted for the breather. When the heater core hose blew off under pressure 2 minutes later and hosed the passenger's side of the motor down with coolant, I think the breather was the right choice. Getting a bunch of coolant in the oil would have been worse than running lean.
By the way, the heater hose blew off because we forgot to clamp it down.