Jeep Diagnostics.

[briteway]

What was the fuel economy before? What you're getting is about right (if that's combined city/hwy). If it was better, then you have another issue; as you took out the old battery the computer has reset itself. S, you'll have to keep on driving till it relearns itself. Then it should be back to normal.

[hornet05]

Fuel consumption

What was the fuel economy before? What you're getting is about right (if that's combined city/hwy). If it was better, then you have another issue; as you took out the old battery the computer has reset itself. S, you'll have to keep on driving till it relearns itself. Then it should be back to normal.

I was getting 14.9.L/100 which ws gret on h/ way and 15.7L/100 around town cruising at 1500 rpm. So you think in time my cr and that petrol bowser will get a divorce sometime? Thanks for the help saved me spending money not needed.

[mek67j]

Wow 18 is pretty high combined. I am in Sydney with the grand V8 and the worst I get combined is 14.5l/100 with 90% city driving. As Briteway said it could be just the adaptive numerator within the ECM that is relearning the fuel trim strategy, if you have just done your fixes (it usually takes about 100kms before it right).

If not then what has the service history been like on the car ?

*Have you cleaned the throttle body and idle valve ?
*What is the air cleaner like when was it changed ?
*What is the condition of the fuel filter & has this been changed ?
*Are you using the correct weight of oil ? Thicker oil = > consumption ?
*Spark plugs ? Condition
*Fuel injectors ? Have these been cleaned.
*Air leaks within the vacuum system ?
*Have you changed the o2 sensors ?
*At idle does the car smell like it is running rich ?
*Does the car feel the same ??

[briteway]

When I had my WG 18-20 was normal in combined city/hwy but then again, it's in Sydney during peak hours, LOL. The same is now with my WH 5.7L.

Hornet05, check this post out, another member just posted it in another thread: http://www.ausjeepoffroad.com/forum/...9&postcount=36

[pmac]

What is the name of a good diagnostic tool for jeeps, one that can change it into economy controll, I think mine is in love with local petrol bowser.

It's called CRD Saying that, I had a V8, and it wasn't that bad for what it was. On the highway, I'd get around the 10-11's. Around town, it was more scary, around 17's.

Another option is LPG - much cheaper to fill although economy is worse.

[warod]

Yesssirreee,

18 L combined is not that bad......about what I achieve with my WH GCL Hemi.

Highway only I can get this down to 14.5 - 15 L/100km ?
Unfortunatley I'm a bit of a pedal jockey ?

[briteway]

Yesssirreee,

18 L combined is not that bad......about what I achieve with my WH GCL Hemi.

Highway only I can get this down to 14.5 - 15 L/100km ?
Unfortunatley I'm a bit of a pedal jockey ?

LOL warod, it's not that bad now as it was when the mechs looked after it. Used to be 22L+

On "your" hwy only, how long do you travel? With the distance it gets better. When I do a 150km trip, I'll get around 14.5L, On a 300km trip 13L and 900km (Syd-Bri) 11.8L and that was on E10. I'm yet to find out how I go with 95 RON.

Yeah, I'm a bit of a "can't help myself" person too when I know what power I have available. At that time I completely forget about fuel.

[hornet05]

Fuel

Wow 18 is pretty high combined. I am in Sydney with the grand V8 and the worst I get combined is 14.5l/100 with 90% city driving. As Briteway said it could be just the adaptive numerator within the ECM that is relearning the fuel trim strategy, if you have just done your fixes (it usually takes about 100kms before it right).

If not then what has the service history been like on the car ?

*Have you cleaned the throttle body and idle valve ?
*What is the air cleaner like when was it changed ?
*What is the condition of the fuel filter & has this been changed ?
*Are you using the correct weight of oil ? Thicker oil = > consumption ?
*Spark plugs ? Condition
*Fuel injectors ? Have these been cleaned.
*Air leaks within the vacuum system ?
*Have you changed the o2 sensors ?
*At idle does the car smell like it is running rich ?
*Does the car feel the same ??

I too live in Sydney, Sotho way, went to penrith via m5,m7,m4, cost me close to 70 dollars in fuel, so will wait for 100 is and see what happens before I get mech to look at the lit you mentioned. Thanks guys.