Exaust manifold leak.....bad mpg?

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Mar 10, 2011 | 05:49 PM

bamfxj

Thread Starter

Seasoned Member

Joined: Nov 2009

Posts: 391

Likes: 1

From: Texas

Year: 1999

Model: Cherokee

Engine: INLINE 6, safari snorkel, kn airfilter, flowmaster 10 series exaust

Exaust manifold leak.....bad mpg?

As my exaust manifold leak seems to get louder and more prevalent, I seems to be getting worse and worse gas mileage. Could that be the issue I'm getting 12 mpg?

Mar 10, 2011 | 06:24 PM

fishtaconc

CF Veteran

Joined: Mar 2009

Posts: 1,208

Likes: 1

From: Watha,NC

Year: Jeepless at the moment

Very possible, my wifes HHR had an exhaust leak at the flex joint, hers went from 28ish avg to 24ish avg, I fixed it now its back up.

Mar 10, 2011 | 06:51 PM

esteem

Seasoned Member

Joined: Jan 2010

Posts: 480

Likes: 3

From: CA

Year: 1998

Model: Cherokee

Engine: 4.0

I had a serious leak and fixed it. I don't know the exact numbers but it was defiantly getting better gas mileage after the fix.

Mar 10, 2011 | 06:58 PM

Destination XJ

CF Veteran

Joined: Sep 2010

Posts: 1,761

Likes: 3

From: Cleveland, OH

Year: 91 Limited

Model: Cherokee

So I shouldnt leave mine broke before the cat because it sounds good?

Mar 10, 2011 | 10:21 PM

esteem

Seasoned Member

Joined: Jan 2010

Posts: 480

Likes: 3

From: CA

Year: 1998

Model: Cherokee

Engine: 4.0

do what you please for the sound, but it the leak is far enough up, it can cause serious problem. Mine was blowing hot air into the engine bay so much that it melted my wiring harness. not fun

Mar 11, 2011 | 03:47 PM

413maxwedge

Senior Member

Joined: Jan 2011

Posts: 689

Likes: 2

From: Upstate N.Y

Year: 2000.1999,1996

Model: Cherokee

Engine: 4.0

Yup mpg's will drop with an exhaust leak. Name: icon_welder.gif
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Mar 11, 2011 | 03:54 PM

413maxwedge

Senior Member

Joined: Jan 2011

Posts: 689

Likes: 2

From: Upstate N.Y

Year: 2000.1999,1996

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by Destination XJ

So I shouldnt leave mine broke before the cat because it sounds good?

It's fine leave it alone but keep your windows up when your driven. Name: suicide.gif
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Exaust manifold leak.....bad mpg?

Exaust manifold leak.....bad mpg?

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