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Unread 03-14-2013, 06:19 AM   #61
PeteYJTJ
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I think maybe some idea of what your 'city' driving is may help ---
Quote:
last week I did 103 miles, 25 of it was highway
You did 75 miles of city driving? If we're talking NY city, stop and go, sitting a lot, not moving, engine running....... Is 8 mpg unrealistic? You've had some 14-15 mpg reports too..... That's not terrible. It would appear that something is still wrong, but I guess I'm wondering "how" wrong.....

Sorry, just a thought.
Pete

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Unread 03-14-2013, 06:47 AM   #62
outofrng623
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Good observation, most of my driving is not NYC driving, but close. I rarely do over 80 miles a week and most if not all of it is around twin stop and go.
I've also had 5.75 mpg weeks where I thought I was easy on the car. So definitely something wrong. 8 to 10 wouldn't be bad but I use to get 13 under the same conditions.

Also. I had a collapsed upper hose again. Bled it again. This is day two. They say three times to do it right. The odd thing is that my overflow is getting fuller each time.
Ugh
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Unread 03-14-2013, 09:52 AM   #63
86cj74.2L
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If your collapsing the upper hose theirs something going on.

Some upper hoses have springs in them. However, I don't know if it belongs in the WJ. But I'm betting it is.
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Unread 03-14-2013, 10:42 AM   #64
ratmonkey
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Quote:
Originally Posted by outofrng623 View Post
Start the truck, check pressure, runs around 57psi, but bounces +/- 1psi (new mopar filter/reg), was 62 steady with the WIX. Isnt this a tad high still? What would cause that and...When I shut off the truck, what should the pressure be and how long should it hold for?
If there is a leak, I would imagine the pressure would slowly drop.
Thanks
reasonably sure it's supposed to be 49psi just like all the rest. higher pressure=higher fuel consumption.
is the overhead display mileage about 20% or more off from your hand calculations?
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Unread 03-14-2013, 12:38 PM   #65
99WJ01TJ
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just a suggestion but my friends 5 speed 94 civic was getting like 25mpg(horrible for that car) so i told him his Catalytic converter was probably toast. We took it to a smog place (this is the only time i will ever say anything positive about smogging cars) and his HC were through the roof somewhere like 2000ppm so 120.00 later (cat & welding) we took it back was at like 100ppm & low and behold after 2 weeks of testing he was getting 37-40mpg's. A clogged cat is the #1 cause of horrible MPG if your car is in good health(next to lead foot disorder)
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Unread 03-14-2013, 02:09 PM   #66
outofrng623
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86, no springs in the upper hose. It's a pretty straight run. Lower hose has one though, few sharp bends.

Ratmonkey, I rarely look at the overhead display. The way it calculates is too out there to use as a gauge for this type of situation. I can tell you some things that may help...Maybe someone with same year/model and a scan tool can compare their readings.

Idle fuel flow rate is 3.15 L/HR
52.55 cc/min
It idles around 650 and does fluctuate down to 500 from time to time, but rare...no stumble.

99WJ, this has been mentioned a few times. Saturday I am bringing the truck in for a compression and smoke test. I will see if he also has a way to test the cats. I have been somewhat ruling it out because I have no smell and I havent had any performance problems...and I do have pressure at the exhaust, but the more I am on here, I am hearing they still could be bad.

Today we changed the thermostat again. My upper collapsed again, lower hose wasnt really getting warm and when we took out the old one, it was sticking...So...that's that, but it hasnt made enough of a difference temp wise to be the culprit. Just a problem in the midst of all of this.

Any guesses why my fuel pressure at the rail would still be so high with a new OEM Mopar regulator?

I also got a good look back at the rear well where the evep canister is. Judging by what Is aw, I am tempted to think that something is leaking back there, but there is no gas smell. I have to look this up in the book at see where this specific hose goes and what it does. Although it was wet and cruddy back and up there, this looked to be wet from something else. I will see if I can post a pic. Its taken from under the truck, looking back and towards the drivers side. The canister is on the bottom left of the pic.
Actually, I believe after looking at the FSM, its the leak detection pump thats on the left. I am trying to figure it out. Sorry
photo.jpg  

Last edited by outofrng623; 03-14-2013 at 02:31 PM.. Reason: wrong info
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Unread 03-14-2013, 03:35 PM   #67
86cj74.2L
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Ill look to see of my 04 has a spring in it.
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Unread 03-14-2013, 03:58 PM   #68
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No spring in upper hose.
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Unread 03-14-2013, 05:04 PM   #69
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I thought I read somewhere that they were available with a spring, and that it was suggested?
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Unread 03-14-2013, 05:16 PM   #70
86cj74.2L
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Quote:
Originally Posted by cuttysark
I thought I read somewhere that they were available with a spring, and that it was suggested?
That's what I thought. I've owned plenty of vehicles that had upper springs. However, I know my 04 hose is original and it has no spring........... He replaced the T-Stat again. Guess its wait and see.
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Unread 03-14-2013, 05:57 PM   #71
outofrng623
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Ill know tomorrow morning. I went out tonight and bled it...there was a good amount of air. So much in fact that when I pulled the bleed nut there was practically nothing there. They say three bleeds. We shall see.
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Unread 03-14-2013, 06:07 PM   #72
86cj74.2L
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Quote:
Originally Posted by outofrng623
Ill know tomorrow morning. I went out tonight and bled it...there was a good amount of air. So much in fact that when I pulled the bleed nut there was practically nothing there. They say three bleeds. We shall see.
You filled the rad with that purge plug removed correct?
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Unread 03-14-2013, 06:17 PM   #73
outofrng623
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Indeed. And bled per the recommended procedure.
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Unread 03-15-2013, 10:37 AM   #74
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Well, the hose was collapsed again this morning...I got annoyed and started going through it myself. One of the fine points of it being a nicer day where I dont worry or care about working on the car...Turns out the overflow was clogging. You could blow through, it would take in coolant, but wouldnt allow collant out. So, I took it all out, spent about 30 minutes cleaning out the bucket (BAD design) and now all should be well. I hope.
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Unread 03-15-2013, 11:54 AM   #75
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Good eye
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