Engine EGR Vacuum Leak

J

Jorsh720

Member

Jul 4, 2019

7

0

13

wisconsin

Oct 1, 2020

#1

• Oct 1, 2020

• #1

I have been trying to track down all vacuum leaks on my new to me fox, I smoke tested it and found smoke coming out of the holes in the EGR valve. I assumed it was bad EGR so, I bought a new one and had the same thing happen. Is this normal for the EGR to leak out those holes or did I get a lemon?

Thanks
Jorsh720

 

Last edited: Oct 2, 2020

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

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Kearney, NE

Oct 2, 2020

#2

• Oct 2, 2020

• #2

That does not sound right at all. It sounds like two bad valve diaphragms.

 

J

Jorsh720

Member

Jul 4, 2019

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0

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wisconsin

Oct 2, 2020

#3

• Oct 2, 2020

• #3

I think the EGR must be bad, I just borrowed a vacuum gun and it would not hold 5-10 inches of vacuum for longer than 5 seconds.

 

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

7,387

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Kearney, NE

Oct 2, 2020

#4

• Oct 2, 2020

• #4

You used the right tools to find the smoking (EGR valve) gun. I hope the rest of the system is leak free and functional. if you are lucky, someone who pulled theirs will send you one for postage or at least a good deal.

 

StratTone

Member

Feb 7, 2017

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18

Oct 14, 2020

#5

• Oct 14, 2020

• #5

I've also seen some new EGRs have leaks. Another spot I think people get some leaks is at the butterfly seal on the throttle body.

 

S

Shuttleman83

Active Member

Jun 30, 2019

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Oct 14, 2020

#6

• Oct 14, 2020

• #6

EGR Gasket?

 

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

7,387

2,745

194

Kearney, NE

Oct 14, 2020

#7

• Oct 14, 2020

• #7

If the gasket on the end that controls the exhaust gas has anything to do with a leak on the control diaphragm end, the valve is bad. It should be easy to use the vacuum pump and gauge to test one off the car.

I suppose when using a smoke machine that a bad valve to manifold gasket would leak smoke. But that would not be from the holes in the valve.

Shuttleman83 said:

EGR Gasket?

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