i have 130k on my 97 4.6. i dont think my 02s have ever been changed.she runs strong. gas mileage could be a few miles better so changing out the front oned would be a good idea??. i dont reeally need to be concerened withy the rears??

 

I've got 172k miles on mine and it's all original... I still get the same, if not a tad better mpg now then when I got the rig w/62k miles on the clock...

Which is around 15-16 mpg for the most part.

What do you consider 'bad' mpg?

Mitch

 

im averaging around 13 mpg.

 

Is most of your driving 'city' or 'hwy' miles? If that's hwy, then that's pretty bad. If it's city, then that's about right.....

I do mostly hwy miles for my figure above.

My wifes little Rav4 gets 18 mpg only going to the park and ride during the week. When we take it on a straight hwy run, it'll get 28 mpg....

Mitch

 

Hi Mitch !

Just stopped buy to say hi

Hey did yuh here about the guy who tried to commit suicide by sticking a Bosch plug in a live wall outlet..

The damn plug still wouldn't fire

 

lol lol that was a good one. id say im 50/50 highway,city. im just bitching cause my 96 crown vic gets around 15-17 mpg. i know its different rear end etc.... if i could just squeeze another 2-3 mpg. just cleaned m.a.f senser. that might help.

 

Hey Jbrew,

Well, last week I did a nice little 650 mile camping trip over a long 4 day weekend... Towed my #5000 TT very well and not a single hiccup! That's with over 110,00 miles on the B plugs now! Still holds locked third gear on the minor hills and will easily pull 3500 rpms @ 55 mph up 6% + grades! It's got a lot more in it too, but that's good enough for me!

I managed to average 10 mpg towing and got 16 mpg on the sightseeing runs.. Not too bad for a rig that by all rights should not even be able to run! ha, ha!!

Keith, don't know what say... Crown Vic will cut thru the air a bit easier then a 'brick'... How you pedal the thing can make a big diff depending on how you drive it too....

Mitch

 

You should be gettin better milage with that truck - theres definitely something wrong. Hard saying what - I would make sure the throttle body and elbow ports are clean , I think I would do that first and go from there..EGR and EVAP systems are something to look at . Your air metering sensors spit out the numbers your PCM uses to calculate fuel. Cleaning the MAF was something worth hitting.

Ignition System healthy ? Lots to consider .

 

Sounds good Mitch !!! I like the 97-98 5.4L's in these trucks - they keep there strength when there takin care of..

I've been trying to hone in my power assist - It use to brake a little better.

 

yea ill hit the e.g.r today that has to be almost clogged. checked plugs id say they are around maybye 10-12K old autolites. wires look ok. ends looked good. tire pressure good.

 

Autolites??? Rolling the dice there - Sometimes they work. IMHO , they don't work well in these motors - that's where I'm pointing the finger..

 

just put the new 02 sensers is yesterday. seemed she got some pep back.running smooth. she on almost empty so ill fill her up and start calculating. plugs looked ok so... all that talk about blowouts has me paranoid.

 

well the 02 senser replacemant really helped. i figure i picked up 2 mpg. thats probably the best ill get.