PCV question... (85 TPI)
Thread Starter
Advanced
Joined: May 2007
Posts: 82
Likes: 0
From: GR MI
PCV question... (85 TPI)
I have an 85, and there is no PCV hose attached to the throttle body. My car does not like to idle when the engine temp. comes into normal operating range, and I believe no PCV to TB is a big reason. My question is what exactly does the PCV system consist of and where do all the hoses go? Does anyone have a diagram or pics for visual reference? My FSM is on the way but I would like to get the ball rolling on this right now while I have the spare time. Thanks.
Former Vendor
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
I don't have an 85 in the shop right now, but I think L98s are all basically the same. The PCV is in the front of the driver's side valve cover. A rubber hose goes to a metal pipe that goes along the inside of the valve cover to a short rubber hose into the manifold.
Thread Starter
Advanced
Joined: May 2007
Posts: 82
Likes: 0
From: GR MI
So one goes to the manifold and one goes to the throttle body? What exactly is the CCV? I don't have anything coming from either valve cover so I'm thinking I should install both of them. Does the L98 need a PCV and CCV for correct idle conditions? Sorry I'm kinda lost on these subjects and my normal helpers aren't very helpful.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
So one goes to the manifold and one goes to the throttle body? What exactly is the CCV? I don't have anything coming from either valve cover so I'm thinking I should install both of them. Does the L98 need a PCV and CCV for correct idle conditions? Sorry I'm kinda lost on these subjects and my normal helpers aren't very helpful.
There should be a fitting on each valve cover with lines running from them. sounds like someone installed different covers a photo would help us tell for sure.
Last edited by floridamale; Jul 10, 2009 at 09:19 PM.
Thread Starter
Advanced
Joined: May 2007
Posts: 82
Likes: 0
From: GR MI
Thanks for the help rodj and floridamale. Yes the PO installed different valve covers and failed to reinstall these lines. There is also a bunch of other screwed up things under the hood, like no A/C and hacked up accessory brackets. I'll get some pics later today. Guess I will need to buy some valves and hoses.
