Timing

[Cor1998XJ]

Hi all
I know that there are a lot of forums on timing the problem is that the standard computer of my XJ was taken out and a after market engine management system was installed. Now this jeep is very heavy on fuel and I just want to know is the Timing 8 or 12 degrees or if some one got a map for me thanks Cor

[4.3LXJ]

I think the first thing to look at is how the O2 sensor interacts with your new ECM. That is the most responsible for fuel/air ratio. But it is a shot in the dark. Which ECM do you have?

[Cor1998XJ]

the ECM that was installed is a Dictator Standard. I dit put the XJ on a dyno but still cant get it better then 5km per liter.

[Cor1998XJ]

What is the normal Fuel consumption on a 4.0L XJ

[Mudderoy]

What is the normal Fuel consumption on a 4.0L XJ

20 miles per gallon is the stated highway. You should see better than 10 MPG and likely 16 to 18 mpg on a stock XJ with 4.0l engine.

[Rockfrog]

FYI - 18 miles per gallon is roughly 7.5 kms per litre (or 13.2L/100km).


Sent from my SGH-I337M using Tapatalk

[slvmart]

When my 2000 was stock, I averaged 21 mpg. But if you have a lift and larger tires, and did not re-gear the diffs, you are fighting physics.