Gas mileage up and down

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Mar 15, 2015 | 01:05 PM

#16

TFitzPat87

Thread Starter

CF Veteran

Joined: Apr 2014

Posts: 1,419

Likes: 1

From: Detroit, MI

Year: 1997

Model: Cherokee

Engine: I6 4.0L

Appreciate it guys. I've started my log today. We'll see what it turns out to be.

Mar 15, 2015 | 02:17 PM

#17

mr white

CF Veteran

Joined: Aug 2011

Posts: 3,648

Likes: 4

Model: Cherokee

Quote:

Originally Posted by jeffcycles

How much influence will a cracked exhaust manifold have over mpg?

It will run rich as *****.

Mar 15, 2015 | 06:34 PM

#18

mschi772

Senior Member

Joined: Mar 2012

Posts: 974

Likes: 14

From: Racine, WI

Year: 1997

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by mr white

It will run rich as *****.

Oh the trusty *****-based scale of measurement.

But yeah, cracked headers often do reduce fuel economy.

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