Jeremy95GT Posted March 24, 2013 Report Share Posted March 24, 2013 I just pulled the upper intake off so I could replace my leaking valve cover gaskets, I noticed that the gasket from the lower to the upper is soaked in fuel... And the bottom of the upper intake has some fuel aswell.... See belowJeremy Link to comment Share on other sites More sharing options...
Det_Riot Posted March 24, 2013 Report Share Posted March 24, 2013 Mine does this too. Idk why :shrug: I was actually about to post a thread today because it gets to the point that itll be noticeable in my throttle body if intake my intake tube off Link to comment Share on other sites More sharing options...
Jeremy95GT Posted March 25, 2013 Author Report Share Posted March 25, 2013 Very odd... Jeremy Link to comment Share on other sites More sharing options...
smallblocksn95 Posted March 25, 2013 Report Share Posted March 25, 2013 I agree, i dont understand why fuel would be getting that far up the intake tract Link to comment Share on other sites More sharing options...
Det_Riot Posted March 25, 2013 Report Share Posted March 25, 2013 I've always though its oil not fuel. Link to comment Share on other sites More sharing options...
1997cobra Posted March 25, 2013 Report Share Posted March 25, 2013 Pcv valve maybe? I know it's a common b head mod motor problem because it gums up the imrcs. People put a oil separator in to keep most of the oil out. That would be my guess. Sent from my DROID BIONIC using Tapatalk 2 Link to comment Share on other sites More sharing options...
95riosnake Posted March 25, 2013 Report Share Posted March 25, 2013 By "bottom of the upper intake" do you mean the outside of the upper intake? Maybe you have a bad O-ring on one (or more) of your injectors and it's leaking a bit and spraying fuel? The gasket would eventually soak up fuel if it was being sprayed on the side of the intake from an injector. Just a thought, other than that I'm puzzled.I had a bad O-ring on one of my 42's, but it was VERY obvious. Once I cycled the key on and it kicked the fuel pump on, it started filling the lower intake area below the rail with fuel pretty fast. Link to comment Share on other sites More sharing options...
Det_Riot Posted March 25, 2013 Report Share Posted March 25, 2013 If this is the same issue I'm having, you noticed it on the meeting area of the upper intake and lower intake plenum. I think mine is contributed due to my PVC valve. Link to comment Share on other sites More sharing options...
95opal Posted March 25, 2013 Report Share Posted March 25, 2013 I would assume thats oil not fuel. Most likely problem would be pcv system. Either routed incorrectly or just not a big enough valve. Try a turbo coupe valve or rethink your current set up. Link to comment Share on other sites More sharing options...
Det_Riot Posted March 25, 2013 Report Share Posted March 25, 2013 I'm fairly sure my set up is garbage. But I don't know. We discussed this in depth but I think mine is still effed up. PCV valve from the lower intake to the upper intake. Vacuum line from brake booster to upper, and vacuum from vacuum tree. Then a breather on the driver side valvecover to the air. Link to comment Share on other sites More sharing options...
95opal Posted March 25, 2013 Report Share Posted March 25, 2013 I'm fairly sure my set up is garbage. But I don't know. We discussed this in depth but I think mine is still effed up. PCV valve from the lower intake to the upper intake. Vacuum line from brake booster to upper, and vacuum from vacuum tree. Then a breather on the driver side valvecover to the air.Yup yours is definitely effed up Link to comment Share on other sites More sharing options...
Det_Riot Posted March 25, 2013 Report Share Posted March 25, 2013 ideally without a catch can how should it be set up? Link to comment Share on other sites More sharing options...
Jeremy95GT Posted March 25, 2013 Author Report Share Posted March 25, 2013 Yea its oil, I made this post before I investigated enough, I was smelling fuel so assumed that's what it was... My pcv setup is stock so maybe I just need to bypass it or somethingJeremy Link to comment Share on other sites More sharing options...
95opal Posted March 26, 2013 Report Share Posted March 26, 2013 ideally without a catch can how should it be set up?Your pcv system doesnt care if you have a catch can or not. You need to decide weather or not your going to run a closed system (ie..like stock) or an open system with breathers or catch can. Right now you have a mix of both, which is a no no. If your going to keep the pcv valve intact then you need to cap off that open breather and connect a vac hose from the oil fill tube back to the intake track. If you plan on using valve cover breathers or catch can set up, you must cap off the pcv valve and cap the port on your intake where you have it plugged in. You cannot run it both ways as it does nothing for evacing your covers. JFYI the way you have it now is nothing but a vacum leak which is not good. Link to comment Share on other sites More sharing options...
Det_Riot Posted March 26, 2013 Report Share Posted March 26, 2013 Your pcv system doesnt care if you have a catch can or not. You need to decide weather or not your going to run a closed system (ie..like stock) or an open system with breathers or catch can. Right now you have a mix of both, which is a no no. If your going to keep the pcv valve intact then you need to cap off that open breather and connect a vac hose from the oil fill tube back to the intake track. If you plan on using valve cover breathers or catch can set up, you must cap off the pcv valve and cap the port on your intake where you have it plugged in. You cannot run it both ways as it does nothing for evacing your covers. JFYI the way you have it now is nothing but a vacum leak which is not good.Makes sense. If I go with the open system, will breathers be necessary on both valve covers? Can they just open to the air or will they leak out oil everywhere? Link to comment Share on other sites More sharing options...
95riosnake Posted March 26, 2013 Report Share Posted March 26, 2013 Some people wrap a wrist warmer around breathers to cut down the oil mist, but it's kind of inevitable that you'll end up with some residue coming out of them regardless. Link to comment Share on other sites More sharing options...
Jeremy95GT Posted March 26, 2013 Author Report Share Posted March 26, 2013 Your pcv system doesnt care if you have a catch can or not. You need to decide weather or not your going to run a closed system (ie..like stock) or an open system with breathers or catch can. Right now you have a mix of both, which is a no no. If your going to keep the pcv valve intact then you need to cap off that open breather and connect a vac hose from the oil fill tube back to the intake track. If you plan on using valve cover breathers or catch can set up, you must cap off the pcv valve and cap the port on your intake where you have it plugged in. You cannot run it both ways as it does nothing for evacing your covers. JFYI the way you have it now is nothing but a vacum leak which is not good.That is some very very helpful info... I've been doing it all wrong apparently aswell lolJeremy Link to comment Share on other sites More sharing options...
Det_Riot Posted March 26, 2013 Report Share Posted March 26, 2013 That is some very very helpful info... I've been doing it all wrong apparently aswell lolJeremyHaha right? Looks like I've got some stuff to fix Link to comment Share on other sites More sharing options...
95opal Posted March 26, 2013 Report Share Posted March 26, 2013 Not sure about either of your combos, but Im assuming your both running HCI set ups. Now if thats the case I wouldnt bother with the stock PCV valve, if you plan on going that route. Use a valve from a turbo coupe as they are a little bit bigger than the stock unit. This may help you as the stock unit is marginal at best for a stock stang. If you plan on offing the PCV all together and go with breathers put one in each cover and cap the pcv. You will have to deal with some oil mist on your covers but no big deal. Or just add a catch can to the breather set up. JFYI doing so will affect what kind of breather you need to buy. As long as your venting your crankcases with either of these setups your fine. Just dont run them the way you currently have them set up. Link to comment Share on other sites More sharing options...
64bit_Tuning Posted March 27, 2013 Report Share Posted March 27, 2013 I just pulled the upper intake off so I could replace my leaking valve cover gaskets, I noticed that the gasket from the lower to the upper is soaked in fuel... And the bottom of the upper intake has some fuel aswell.... See belowJeremywerent you complaining about a hanging idle???seems you found one issue... Get a new gasket, and buy some of this stuff. spray both sides of the gasket, let them slightly dry to a tack... re-install and torque manifold. Then say goodbye to that vac leak forever! Link to comment Share on other sites More sharing options...
revhead347 Posted March 27, 2013 Report Share Posted March 27, 2013 I always vote to keep the PCV system on an N/A engine. What you pay for an oil seperator you'll make up for in oil changes.Kurt Link to comment Share on other sites More sharing options...
95opal Posted March 28, 2013 Report Share Posted March 28, 2013 I always vote to keep the PCV system on an N/A engine. What you pay for an oil seperator you'll make up for in oil changes.KurtI was waiting for that comment from you lol Link to comment Share on other sites More sharing options...
revhead347 Posted March 28, 2013 Report Share Posted March 28, 2013 You knew it was coming.Kurt Link to comment Share on other sites More sharing options...
95opal Posted March 28, 2013 Report Share Posted March 28, 2013 You knew it was coming.KurtYup and I can see your perspective on it also. Link to comment Share on other sites More sharing options...
64bit_Tuning Posted March 28, 2013 Report Share Posted March 28, 2013 The factory PCV system leaves much to be desired. I'll see if I can find the old write up I did when I built my system. Link to comment Share on other sites More sharing options...
revhead347 Posted March 28, 2013 Report Share Posted March 28, 2013 The factory PCV system leaves much to be desired. I'll see if I can find the old write up I did when I built my system.I agree. The breather element is insufficient and the routing sucks up way too much oil.Kurt Link to comment Share on other sites More sharing options...
Det_Riot Posted March 28, 2013 Report Share Posted March 28, 2013 Hey keith, if you can't find the write up can you sketch out how yours is ran? Link to comment Share on other sites More sharing options...
95opal Posted March 28, 2013 Report Share Posted March 28, 2013 Hey keith, if you can't find the write up can you sketch out how yours is ran?If your keeping The PCV valve just run vac from the valve to the intake and run a vac line from the oil fill tube back to the air intake track. Very simple, but like I said a valve from a turbo coupe would be better than the stocker. You may also want to drop an oil seperator in to keep the oil from getting into your intake. Its really quite simple Link to comment Share on other sites More sharing options...
64bit_Tuning Posted March 28, 2013 Report Share Posted March 28, 2013 If your keeping The PCV valve just run vac from the valve to the intake and run a vac line from the oil fill tube back to the air intake track. Very simple, but like I said a valve from a turbo coupe would be better than the stocker. You may also want to drop an oil seperator in to keep the oil from getting into your intake. Its really quite simpleNo, the problem with the factory system is that your drivers side valve cover never really gets evacuated. This can cause condensation to build in that cover and lead to other issues that I'd rather not get into.Now, to help eliminate this issue and stay relatively affordable, I did the following.I use FRPP tall valve covers... like these. The advantage to running these covers is that EACH cover has a hole for a filler cap. The disadvantage is that the passenger side cap is a bitch to fill with, because of where it is... and the drivers side cap will be stuck under the average upper intake manifold.So what I did was to take a hose off my intake tube, and ran it to the passenger side cover and fitted a modified PCV valve into the hole in the cover. (modified by cutting the bottom off and removing the guts). I then used the same grommet setup on the drivers side cover and put a whole PCV valve there, then connected it to my manifold.Here's a few pics.And here is an unedited shot. Link to comment Share on other sites More sharing options...
95opal Posted March 29, 2013 Report Share Posted March 29, 2013 No, the problem with the factory system is that your drivers side valve cover never really gets evacuated. This can cause condensation to build in that cover and lead to other issues that I'd rather not get into.Now, to help eliminate this issue and stay relatively affordable, I did the following.I use FRPP tall valve covers... like these. [ATTACH=CONFIG]2085[/ATTACH]The advantage to running these covers is that EACH cover has a hole for a filler cap. The disadvantage is that the passenger side cap is a bitch to fill with, because of where it is... and the drivers side cap will be stuck under the average upper intake manifold.So what I did was to take a hose off my intake tube, and ran it to the passenger side cover and fitted a modified PCV valve into the hole in the cover. (modified by cutting the bottom off and removing the guts). I then used the same grommet setup on the drivers side cover and put a whole PCV valve there, then connected it to my manifold.Here's a few pics.[ATTACH=CONFIG]2086[/ATTACH][ATTACH=CONFIG]2087[/ATTACH]And here is an unedited shot.[ATTACH=CONFIG]2088[/ATTACH]I like that nice and simple. Link to comment Share on other sites More sharing options...
Det_Riot Posted March 29, 2013 Report Share Posted March 29, 2013 Thanks Keeif! Guess I just gotta pull my passenger valve cover, drill a hole, and put one on my intake tube. Link to comment Share on other sites More sharing options...
64bit_Tuning Posted March 29, 2013 Report Share Posted March 29, 2013 the beauty of my setup is that you get actual air exchange completely across the engine. from one cover, down into the lifter valley, and back up through the other cover.An alternative to my setup would be to allow your metered fresh air source to enter both valve covers, and exit through the stock PCV location. I did not have this option because my intake doesn't have a PCV provision. Link to comment Share on other sites More sharing options...
Det_Riot Posted March 29, 2013 Report Share Posted March 29, 2013 With your setup, could you leave the OEM pcv valve in place or would you want to plug it? Link to comment Share on other sites More sharing options...
64bit_Tuning Posted March 29, 2013 Report Share Posted March 29, 2013 You can utilize the stock PCV location. The only change to my setup would be to use a modified valve in both covers, and route their hoses to your CAI tube for fresh air inlet. Link to comment Share on other sites More sharing options...
Det_Riot Posted March 29, 2013 Report Share Posted March 29, 2013 oooo okay I get what you're saying. thanks dude makes perfect sense! Link to comment Share on other sites More sharing options...
