TJ engine swap - 4.0 to something with better MPG?
 

I have a 97 TJ 4.0/manual thats been great on road and off - the only
consistent problem I have with the Jeep is the MPGs, way less than
advertised, I'm averaging 12-14 in city and about 16 on freeway.

I've checked everything out possible, and even taken it to the
stealer; either I have a very heavy foot or I just have a thirsty
jeep.

I'm basically annoyed by the gas mileage, so my question is- can I
swap in an engine (or engine/tranny combo) that will give me at least
the same performance (torque, power) and also has mpg in the 19-24 mpg
range?

Sure its a lot to ask, but if its possible I'd like to do it and
figure it would be a fun project.

thanks.

Re: TJ engine swap - 4.0 to something with better MPG?
 

Try a 3-banger from a Geo...

-jeff

Re: TJ engine swap - 4.0 to something with better MPG?
 

Try a 3-banger from a Geo...

-jeff

Re: TJ engine swap - 4.0 to something with better MPG?
 

Try a 3-banger from a Geo...

-jeff

Re: TJ engine swap - 4.0 to something with better MPG?
 

Try a 3-banger from a Geo...

-jeff

Re: TJ engine swap - 4.0 to something with better MPG?
 

How could you possibly justify the cost of an engine swap for that mpg
difference? Your TJ gets pretty normal mpg for a TJ, IMO.

munchiechee wrote:

> I have a 97 TJ 4.0/manual thats been great on road and off - the only
> consistent problem I have with the Jeep is the MPGs, way less than
> advertised, I'm averaging 12-14 in city and about 16 on freeway.
>
> I've checked everything out possible, and even taken it to the
> stealer; either I have a very heavy foot or I just have a thirsty
> jeep.
>
> I'm basically annoyed by the gas mileage, so my question is- can I
> swap in an engine (or engine/tranny combo) that will give me at least
> the same performance (torque, power) and also has mpg in the 19-24 mpg
> range?
>
> Sure its a lot to ask, but if its possible I'd like to do it and
> figure it would be a fun project.
>
> thanks.

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: TJ engine swap - 4.0 to something with better MPG?
 

How could you possibly justify the cost of an engine swap for that mpg
difference? Your TJ gets pretty normal mpg for a TJ, IMO.

munchiechee wrote:

> I have a 97 TJ 4.0/manual thats been great on road and off - the only
> consistent problem I have with the Jeep is the MPGs, way less than
> advertised, I'm averaging 12-14 in city and about 16 on freeway.
>
> I've checked everything out possible, and even taken it to the
> stealer; either I have a very heavy foot or I just have a thirsty
> jeep.
>
> I'm basically annoyed by the gas mileage, so my question is- can I
> swap in an engine (or engine/tranny combo) that will give me at least
> the same performance (torque, power) and also has mpg in the 19-24 mpg
> range?
>
> Sure its a lot to ask, but if its possible I'd like to do it and
> figure it would be a fun project.
>
> thanks.

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: TJ engine swap - 4.0 to something with better MPG?
 

How could you possibly justify the cost of an engine swap for that mpg
difference? Your TJ gets pretty normal mpg for a TJ, IMO.

munchiechee wrote:

> I have a 97 TJ 4.0/manual thats been great on road and off - the only
> consistent problem I have with the Jeep is the MPGs, way less than
> advertised, I'm averaging 12-14 in city and about 16 on freeway.
>
> I've checked everything out possible, and even taken it to the
> stealer; either I have a very heavy foot or I just have a thirsty
> jeep.
>
> I'm basically annoyed by the gas mileage, so my question is- can I
> swap in an engine (or engine/tranny combo) that will give me at least
> the same performance (torque, power) and also has mpg in the 19-24 mpg
> range?
>
> Sure its a lot to ask, but if its possible I'd like to do it and
> figure it would be a fun project.
>
> thanks.

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: TJ engine swap - 4.0 to something with better MPG?
 

How could you possibly justify the cost of an engine swap for that mpg
difference? Your TJ gets pretty normal mpg for a TJ, IMO.

munchiechee wrote:

> I have a 97 TJ 4.0/manual thats been great on road and off - the only
> consistent problem I have with the Jeep is the MPGs, way less than
> advertised, I'm averaging 12-14 in city and about 16 on freeway.
>
> I've checked everything out possible, and even taken it to the
> stealer; either I have a very heavy foot or I just have a thirsty
> jeep.
>
> I'm basically annoyed by the gas mileage, so my question is- can I
> swap in an engine (or engine/tranny combo) that will give me at least
> the same performance (torque, power) and also has mpg in the 19-24 mpg
> range?
>
> Sure its a lot to ask, but if its possible I'd like to do it and
> figure it would be a fun project.
>
> thanks.

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: TJ engine swap - 4.0 to something with better MPG?
 

So how many years do you figure it'd take to pay for the cost of the engine
conversion with better fuel economy. My best suggestion is that you sell
the Jeep and buy a Geo.

Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/
"munchiechee" <munchiechee@sbcglobal.net> wrote in message
news:cb153bd2.0408212159.54b21140@posting.google.c om...
> I have a 97 TJ 4.0/manual thats been great on road and off - the only
> consistent problem I have with the Jeep is the MPGs, way less than
> advertised, I'm averaging 12-14 in city and about 16 on freeway.
>
> I've checked everything out possible, and even taken it to the
> stealer; either I have a very heavy foot or I just have a thirsty
> jeep.
>
> I'm basically annoyed by the gas mileage, so my question is- can I
> swap in an engine (or engine/tranny combo) that will give me at least
> the same performance (torque, power) and also has mpg in the 19-24 mpg
> range?
>
> Sure its a lot to ask, but if its possible I'd like to do it and
> figure it would be a fun project.
>
> thanks.