Strange Smog Crossover pipe to EGR valve setup

94FiveOVurt · June 13th, 2011, 12:08 AM

Hey guys,

When I bought my 94 gt it had shorty headers on it with the smog port plugged with a bolt but I noticed today of a strange bypass setup that the previous owner did.

He connected the bottom of the EGR Valve directly to the smog crossover valve thing that would normally go to the exhaust manifold.

Is this a problem or is this okay? Looks like he used a big fuel line hose to connect the egr valve to the smog crossover pipe. So basically on the Smog Crossover pipe, one end is correct and bolts to the head and on the other end it goes to the bottom of the EGR valve by a fuel/vacuum hose connection.

94FiveOVurt · June 13th, 2011, 06:47 PM

Anybody?

94FiveOVurt · June 15th, 2011, 02:37 PM

94FiveOVurt · June 16th, 2011, 10:43 PM

Bubba95SN · June 16th, 2011, 11:17 PM

The 94-95 had the incoming exhaust coming up from around the #3 cylinder to the EGR. That was how they did it those 2 years.

91cobra5.0 · June 16th, 2011, 11:18 PM

take a picture and post it if u can, it sounds like it would be ok

94FiveOVurt · June 17th, 2011, 10:08 AM

Okay here is a picture. As you can see, the vacuum hose used is also kinked at the EGR Valve exit and Smog Crossover exit.

mr_josh · June 17th, 2011, 11:56 AM

That's a noble attempt, but I don't think it's actually capable of doing anything.

The pipe coming from the back of the heads has a check valve on the end of it, ensuring that exhaust can't come out of it, only air can go IN to it. Assuming that your EGR is hooked up and the valve can open, it will just be drawing against the check valve. Essentially, that hose is doing nothing.

June 13th, 2011, 12:08 AM	#1
94FiveOVurt Newbie Join Date: Jun 2011 Posts: 36 iTrader: 0 reviews	Strange Smog Crossover pipe to EGR valve setup Hey guys, When I bought my 94 gt it had shorty headers on it with the smog port plugged with a bolt but I noticed today of a strange bypass setup that the previous owner did. He connected the bottom of the EGR Valve directly to the smog crossover valve thing that would normally go to the exhaust manifold. Is this a problem or is this okay? Looks like he used a big fuel line hose to connect the egr valve to the smog crossover pipe. So basically on the Smog Crossover pipe, one end is correct and bolts to the head and on the other end it goes to the bottom of the EGR valve by a fuel/vacuum hose connection.

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June 13th, 2011, 06:47 PM	#2
94FiveOVurt Newbie Join Date: Jun 2011 Posts: 36 iTrader: 0 reviews	Anybody?

June 15th, 2011, 02:37 PM	#3
94FiveOVurt Newbie Join Date: Jun 2011 Posts: 36 iTrader: 0 reviews

June 16th, 2011, 10:43 PM	#4
94FiveOVurt Newbie Join Date: Jun 2011 Posts: 36 iTrader: 0 reviews

June 16th, 2011, 11:17 PM	#5
Bubba95SN Regular 1995 Mustang GT Join Date: Feb 2011 Location: Jacksonville NC Posts: 211 iTrader: 0 reviews	The 94-95 had the incoming exhaust coming up from around the #3 cylinder to the EGR. That was how they did it those 2 years.

June 16th, 2011, 11:18 PM	#6
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	take a picture and post it if u can, it sounds like it would be ok

June 17th, 2011, 10:08 AM	#7
94FiveOVurt Newbie Join Date: Jun 2011 Posts: 36 iTrader: 0 reviews	Okay here is a picture. As you can see, the vacuum hose used is also kinked at the EGR Valve exit and Smog Crossover exit.

June 17th, 2011, 11:56 AM	#8
mr_josh Newbie Join Date: Aug 2009 Posts: 3 iTrader: 0 reviews	That's a noble attempt, but I don't think it's actually capable of doing anything. The pipe coming from the back of the heads has a check valve on the end of it, ensuring that exhaust can't come out of it, only air can go IN to it. Assuming that your EGR is hooked up and the valve can open, it will just be drawing against the check valve. Essentially, that hose is doing nothing.

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