pcv system routing help please!
Thread Starter
|
Senior User
Joined: Mar 2007
Posts: 316
Likes: 0
pcv system routing help please!
I looked through several posts after a quick search, but I am still wondering.
I have a 66 F-100 with a 300-I6, and a NP435 trans. The 300 was put it by your's truly as it was in the bed of the truck and the engine hole was empty when I got it. I am unsure of the year of the motor? I am running a Carter YF(manual choke conversion). The carb rebuilt myself. The drivability, idle quality and vac have rapidly declined with a recent addition of a heat shield, and new PCV valve. I have chased all vac problems to the new PCV valve.
I can hear the valve fluttering and see my dash mount vac gauge move irradicly at 12 to 14 HG." When I simply let the vac at the PCV pull a piece of paper tight to it, the engine smooths out and the gauge reads 16 HG." @ 650 RPMs.
The PCV valve is in the rear of the valve cover. It is plumbed directly to a port in the intake manifold directly under the carb. I have a oil filler cap with a grommet in the front of the valve cover. It is plumbed directly to the bottom of the air cleaner. Is this correct?
I have removed the PCV from the valve cover and plugged the port in the intake until I get a new valve tomorrow. Kind of a poorboy road draft without the tube? Since doing this the idle smoothed out, my stinking blubbering flowmaster is tolerable and it doent stall when I hit a light or stop sign.
I am pretty sure I have it nailed, but when I got it it had a PCV valve in the rear and in the oil filler cap. Frequently at idle oil would literally pour out of it. I assumed it was somehow getting crankase positive pressure and causing the oil to puke. Once I illiminated the PCV in the front at the oil filler cap this problem was solved.
So,,, Is the PCV plumbing correct as I described it above??
TIA, Todd
I have a 66 F-100 with a 300-I6, and a NP435 trans. The 300 was put it by your's truly as it was in the bed of the truck and the engine hole was empty when I got it. I am unsure of the year of the motor? I am running a Carter YF(manual choke conversion). The carb rebuilt myself. The drivability, idle quality and vac have rapidly declined with a recent addition of a heat shield, and new PCV valve. I have chased all vac problems to the new PCV valve.
I can hear the valve fluttering and see my dash mount vac gauge move irradicly at 12 to 14 HG." When I simply let the vac at the PCV pull a piece of paper tight to it, the engine smooths out and the gauge reads 16 HG." @ 650 RPMs.
The PCV valve is in the rear of the valve cover. It is plumbed directly to a port in the intake manifold directly under the carb. I have a oil filler cap with a grommet in the front of the valve cover. It is plumbed directly to the bottom of the air cleaner. Is this correct?
I have removed the PCV from the valve cover and plugged the port in the intake until I get a new valve tomorrow. Kind of a poorboy road draft without the tube? Since doing this the idle smoothed out, my stinking blubbering flowmaster is tolerable and it doent stall when I hit a light or stop sign.
I am pretty sure I have it nailed, but when I got it it had a PCV valve in the rear and in the oil filler cap. Frequently at idle oil would literally pour out of it. I assumed it was somehow getting crankase positive pressure and causing the oil to puke. Once I illiminated the PCV in the front at the oil filler cap this problem was solved.
So,,, Is the PCV plumbing correct as I described it above??
TIA, Todd
