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  #13  
Old 02-07-2013, 03:07 PM
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I understand that but that is not what I am asking. Bill-de is saying there is no difference in the quality of the octanes. I disagree 100%.
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  #14  
Old 02-07-2013, 03:09 PM
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Re: Where to Start...

If you are wanting this to be a potential bug out vehicle, you should do nothing to it. Keeping it as stock as possible will keep it as reliable as possible.

You have a good solid Jeep. You should run the fuel that is recommended in the book. Save those extra pennies per gallon, and save them up.

Run the tires that came with the Jeep until they need replacing, then consider something larger for off roading, however know that they will also cause you to burn more fuel.

Your emotions may cause you to do all sorts of foolish things, so settle down. Put some money in the bank instead on in your Jeep until you have built up a bankroll for future emergencies.

Pay every payment on time, and save where you can so you can get away from borrowing all the time, and pay cash for your needs. (amazing how paying with cash focuses your dedisions, where buying on credit gets you in trouble.)

Hope you enjoy your new Jeep.
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  #15  
Old 02-07-2013, 03:38 PM
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Re: Where to Start...

Quote:
Originally Posted by Hacksaw View Post
Does it rev at all ? Say you're on the highway with cruise set do the rpms jump around on flat ground ? If it does replace the throttle position sensor (tps). Not sure if the 3.7 is a "fuel filter change not required" vehicle but I would definitely change that. Does it shift ok ?

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No, no abnormal revving really.. and the odd thing is I have been babying it. When I purchased it.. it had an odd clunk sound/thump sound when I would take off.. come to find out.. U-JOINT. Got that fixed yesterday.. and it's a totally NEW vehicle, but I figured eliminating whatever wheel wobble it was experiencing would have cleared up any mpg killing issues there. but NOPE. It seems it has only progressively gotten worse.

Also, it threw a "STORED" code twice.. the first time they shut it off, *(guess there is a difference between "ACTIVE" and "STORED" codes)* anyways.. that code is from what the mechanic told me is o2 sensors on the cat either registering the wrong mixture or the cat being just on it's way out.. or a combo of both.. the code doesn't discern apparently. just says there is something gone awry in there. So since my knowledge about vehicles only extends to simplistic maintenance tasks "brake pads, oil change, air filter replacement/cleaning, and putting proper air pressure into the tires" ... being limited like that I have to take the mechanic for his word.. so on that note.. i also don't know if something like that can adversely effect gas mileage (im sure it does).. This of course is all being taken care of free of charge but when they have the time etc. etc. meanwhile I am pissing through gas and since it's not throwing that code all the time it's means for them to say "oh it doesn't need to be tended to right away sir.." blah blah effin' blah !! You can't force people to do your bidding and getting heated and throwing a fit just isn't the right way to go.. so apparently when it is evident that it needs fixing they'll do it. I think that's a bunch of BS .. but creating tension with a place that i have a bumper to bumper warranty on wouldn't be a good idea.. so I am hoping it throws a continuous active code for it so they take care of it.. (or heck.. they said if it throws it again regardless they will replace it .. ) but still .. just irritating.

Ok, now, as far as that scenario you presented.. The cruise is from how I've tried to work it... I was able to get it to work the first day I had it.. now for some reason (i haven't but tried it twice) but the time I did get it to work.. No, the rpm's were definitely not jumping on flat ground...

As far as the fuel filter goes.. I found this on a forum elsewhere about it

"The fuel filter in a Grand Cherokee made in 2005 or later is inside the fuel tank, and it is generally assumed not to need routine replacement."

So whether that is accurate or whether or not it applies to my vehicle or not.. maybe it does need a replaced fuel filter.. I could ask them, but I bet my odds may be better to have it looked at somewhere else and get an idea what is going on, but it's not like I am rich. Much like I am sure most of you are on budget.. so aren't I but I definitely need to make sure she is running in peak tip-top shape !!

And the shifting.. ehh... I would say it isn't the smoothest in the world.. about a little more smoothness than my Cadillac but I literally beat the ever living crap out of the Esky. From what I know, it was pretty much babied and used as a back and forth to work for a single older lady. There is no Clunk, or thump, or bang, or hesitation in the shifting but it does seem a lil slower than it should be, but that could be all in my head because for 3 yrs i've been driving a different vehicle and this is my first Jeep.

Now don't get me wrong. For all intents and purposes I love it. And truth be told, I probably won't be getting rid of it when I pay it off.. in fact.. My Oldest Daughter will be turning 16 when I pay her off so.. who knows.. I could end up giving it to her when All is said and done. And we Live in MAINE so practically EVERY 16-18 yr old High School Licensed driver drive 4X4 SUV's so.. it's not like she would be happy in a Accord.. heck no.. half the roads are dirt roads through the woods to the lakes/ponds/rivers.. Just the way of life here.. so yah.. I want to make sure it's definitely safe and in working order.. that being said..

NEGATIVES I HAVE NOTICED:

The brakes are absolutely horrible in my opinion. Sure yes I know I am basing this off of driving an ESKY with large(16") 6 piston calipers and she stopped like a dream all the way from 100mph+ to 0 ... of course the variation would be night and day but I feel that regardless that these stock current brakes are just not a very well liked piece of OEM. So after an hour or so of digging I can across something that I hoping could just be a simple fix and change... "Power Stop Brake Kit" .. it's roughly 400 dollars and it seems for what you get.. it's one heck of an upgrade for something I feel is an extreme weak point or flaw if you will in the whole vehicular systems.

and, this is why I think the Hypertech would come in very handy. The only time I have ever dealt with a performance enhancing chip was on a Silverado 1500 .. A Buddy of mine used "SUPERCHIPS" and the difference in performance was so unbelievable it literally changed my whole view of what is capable for performance when you really focus your time into it (yes he had other things done, but driving it from one day without SUPERCHIPS and then one day with.. ) The biggest thing for me was Throttle Response... instantaneous... if you put your foot down, it lurched like it was supposed to.. That is exactly what I am missing in this Is Instant Throttle Response.. in my Escalade without SuperChips it had that instant vrrroooommmm ...

So the only real way to improve that would be through a Hypertech Max Energy Chip thing and/or a new Throttle Body correct??
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Old 02-07-2013, 03:45 PM
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Re: Where to Start...

Quote:
Originally Posted by Uncle Paul View Post
If you are wanting this to be a potential bug out vehicle, you should do nothing to it. Keeping it as stock as possible will keep it as reliable as possible.

You have a good solid Jeep. You should run the fuel that is recommended in the book. Save those extra pennies per gallon, and save them up.

Run the tires that came with the Jeep until they need replacing, then consider something larger for off roading, however know that they will also cause you to burn more fuel.

Your emotions may cause you to do all sorts of foolish things, so settle down. Put some money in the bank instead on in your Jeep until you have built up a bankroll for future emergencies.

Pay every payment on time, and save where you can so you can get away from borrowing all the time, and pay cash for your needs. (amazing how paying with cash focuses your dedisions, where buying on credit gets you in trouble.)

Hope you enjoy your new Jeep.
Thank You UNCLE PAUL .. that was very well received and I never really thought of it like that.. No where I believe I will give your advice a go (since I was already planning on doing so anyways..) is to start saving the pennies or however we should say it. You are right, I need preparedness and I am a long way out from that this is true. I wish i could take into your consideration on leaving it stock.. I dont know why I cant because I know you are 100% correct on it being the MOST reliable in that state.. I guess I just feel that I may be lacking in a few spots to guarantee survival from it. Not having the correct tires or proper body lift may be life or death if I can't get over a fallen Limb/Tree and I can't entrust my survival on that possibility of scenario.. But Thank You very much for that Sir!! Much Respect
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  #17  
Old 02-07-2013, 03:48 PM
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Re: Where to Start...

Quote:
Originally Posted by Hacksaw View Post
It calls for 87 octane minimum

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So with that being the MINIMUM and there being a no obviously printed Maximum.. the benefits from running 87 vs 91 octane are just non-existent ?? Hahahaa so I've probably blown literal THOUSANDS of dollars on 91 octane for no reason at all !? lol.. God don't I feel like a schmuck !! :-D
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  #18  
Old 02-07-2013, 04:53 PM
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Quote:
Originally Posted by Deuce1911 View Post
So with that being the MINIMUM and there being a no obviously printed Maximum.. the benefits from running 87 vs 91 octane are just non-existent ?? Hahahaa so I've probably blown literal THOUSANDS of dollars on 91 octane for no reason at all !? lol.. God don't I feel like a schmuck !! :-D
If you think it does something for you great, but according to the manufacturer (who writes the software that controls the fuel delivery and combustion) it is designed to work best with 87...now if you've done a tune to take advantage of the higher octane that can change. I ask this if more is better why are you running 91 when 94 is available? Or hell go to a local airport (small one) and fill up with 100 octane aviation gas that would be infinitely better. As to you being a schmuck...if you say so.
I'm just trying to help figure out your awful fuel economy
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Old 02-07-2013, 05:31 PM
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Re: Where to Start...

I hope you don't think I was being rude.. I was being more inquisitive being that I am highly not even in the least bit knowledgeable in this area of expertise... You need a Rifle built that can shoot Sub-.5 moa I'm your guy but when it comes to anything Motor Driven .. Im as numb as a pounded thumb.. I would really like for you to help my awful fuel economy.. truly I would.. so.. where were we :-/ what should I look into first?
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  #20  
Old 02-08-2013, 11:12 AM
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Re: Where to Start...

Deuce

I have an 06 3.7. when i got mine i was the same way. Everyone likes to knock on the 3.7, it's just as powerful as a nice v8 in the 60's.. so just think of it that way .

I let my tires run bald, then i got a 2 inch Budget boost, and stuck on 265/70/17 tires. So i had a jeep, with a v-6, and a lift, and tires. The lift was small enough to be rather un noticeable, but large enough to see the more aggressiveness. the truck still drove just fine, even with the larger tires, and even the lift, it was just as powerful as it was before.. not very much so.. but all the same.

a big issue with a big truck and a small motor, is you feel like your going slower than you are when you start from a stop, the truck will go as fast as you need it to , in as little or max time as you need it to. Keep in mind, people don't NEED to get to 60 in 4 seconds, they want to.

I get on average 23 MPG before the tires and lift ( not sure how ANYONE gets anything less, as that's on the lower end for me ) , after the tires, im about 18, so real world drop is closer to 3 -4 MPG. I have a real wheel drive jeep, it's not even a 4x4, and with the budget boost and larger tires, i can go anywhere i would NEED to, again.. i don't NEED to climb bolders , while it's fun it won't do it.

After a few months of posting on here, i decided i would try some power things, so i got a hypertech, it's great, but i think most of the gains people have, are in there head because they expect something. My MPG wen't back up to aroud 20-21 and the speedo is right now.. so either way.. that's a plus in it's own.

i plasti dipped my grill, and rims. This is about all ive done to my jeep thus far, i havn't touched the shocks, or anything like that ( i plan to eventualy ) , but for something you want done, i was able to get it lifted, new tires ( brand new not used ) , and the programmer. I did it all for under 1300 bucks. And i have a decent looking, more agressive truck, that has the same amount of power ( and feel of power ) that it came from the factory with .

to each there own buddy !
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Old 02-08-2013, 11:37 AM
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Re: Where to Start...

As for the higher octane.. it's another common misconception. Putting higher rating octane in a car that doesn't call for it, can actually cause more harm than good.

Depending on where you live, you are probably looking at a RON octane rating.. aussie land, africa, europe, places like that.. if your in the united states.. or canada, your looking at a MON rating. the MON rating is rated and tested at a higher RPM than the RON, which is 600 ( leave it to north america to be different ).

the american ocane rating is actually even a bit different. Im sure many of you have seen (R+M)/2) written on the pump, this is actually what's called an AKI ( Anti Knock Index ) . the (R+M)/2) is Ron + Mon / 2 == the mean. so that octane rating your getting here in the united states.. is actually about 3-4 numbers lower than anywhere in the world.

with that said! Using a higher octane may not actually " damange " anything than probably cause some knock early on. simply because a higher octane rating simply means how fast it burns under pressure. If your car has a high compression rate, and it's using a high firing octane, you will probably hear some knock. that's why sports cars use high high rating gas.. it bruns slower, and takes more pressure to ignite. they can wind up to super high RPMS with little to no pinging

hope this provides you just a bit more info on octane ratings deuce
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Old 02-08-2013, 11:42 AM
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Re: Where to Start...

So what in the world could be causing my avg mpg being 12.5-13.0mpg !?!? This is making ZERO sense to me ... and the worst part like i said, i cant just be like.. "HEY GUYS I BOUGHT THIS OFF.. SOMETHING ISN'T RIGHT I DONT KNOW WHAT IT IS.. BUT FIX IT !! " Lol..
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Old 02-08-2013, 11:58 AM
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I thought I had posted but its gone now...Did the mechanic say what the stored codes were? Need to determine which o2 sensors are malfunctioning they can cause problems. Also the WJ's had an internal sock and external filter with fuel pressure regulator that is described how you described the manual for yours. Many WJ owners experienced large mpg gains after replacing it $30 and 30 minutes that's cheap and easy ROI. Some people swear by seafoam and claim it cures everything from burning oil to crappy mileage...cheap and won't hurt anything. Another item overlooked is a real injector cleaning there are lots of dump in the tank products out there but not to sure how well they work. Check out a shop that sells BG products and ask them how much for an injector cleaning. Lastly if the guy didn't tell you the codes (P numbers) you can go to many auto parts stores and borrow an odb2 scan tool and retrieve them. There is a post in the Jeep technical discussion forum that lists them.

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Old 02-08-2013, 12:17 PM
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Re: Where to Start...

Deuce, for one, Hacksaw is right. Check the o2 fo shizzle. Another thing to check, the car's got 80k miles.. when was the last tune up done ?

And are you doing the mileage by yourself, or are you using evic.. if evic is saying that, please do it by hand the mathmaticcal way.. computers can fail , it could be wrong.

Also, when your driving on the freeway, after about 5 minutes of it, hit reset on the EVIC, see what the FIRST average is.. then watch the number drop, is it dropping as you have cruise control on, are you going faster than normal, every 4 - 5 minutes hit reset.. see if you can find a trend.

if your resetting it, and it's starting at 18.. then working it's way down, while going the same speed I.E .. 65, then check for codes ( even if the lights not on, it may have a code ) , aside from that, i'll let the others pop in answers. as i don't really know. I just know my evic says i get 21 with my tires and lift.. and before that i could once in a while hit 25 ( flat lands , in texas ) .

Also side note.. how many people are in the truck when you get 13mph, do you have a bunch of gear or anything in it, hows the tire pressure ?
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