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Old 01-17-2010, 09:10 PM   #1
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another freaking issue with 08

Got in jeep this morning , it was @ 50ish outside , I go to pull out on the road and jeep has no power at all , I almost got hit by traffic . Anyways I could push gas pedal and it would lose power to point of almost about to die , you could here valves clicking , got back in drive way checked all fluid levels everything was fine , started it back up and it ran fine . WTH I love my jeep but it only has 39000 miles and I already had about 4 different issues . I am waiting for 2011 going to trade it for rubi , world ends in 2012 so I would only have a year of payments

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Old 01-18-2010, 01:21 AM   #2
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That sucks. I have yet to have any major issues with my 08 unlimited, but I have only put about 9k on it. When you shut it off and then turned it back on it was fine?

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Old 01-18-2010, 06:39 AM   #3
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Load-test your battery, check the ground, look for corrosion, sulfate on terminals, terminal connection.
Sounds like something went wonky in your fuel injection for a bit.
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Old 01-18-2010, 07:09 AM   #4
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i had that same issue on my jeep yj and then out of no where on my toyota tacoma (about 3 months ago when it was just getting cold) both of which i floored it and all i got back was weak power and the more gas the worse... pulled over to the side of the road, and recranked it and everything was fine... not sure but i thought it might have flooded it or something and not getting the right amount of air or something along those lines is how it felt, sluggish and out of sync but i restarted and didnt floor it and all was fine, maybe the engine was too cold?? not sure...
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Old 01-18-2010, 07:52 AM   #5
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Originally Posted by mudbugjeep View Post
Got in jeep this morning , it was @ 50ish outside , I go to pull out on the road and jeep has no power at all , I almost got hit by traffic . Anyways I could push gas pedal and it would lose power to point of almost about to die , you could here valves clicking , got back in drive way checked all fluid levels everything was fine , started it back up and it ran fine . WTH I love my jeep but it only has 39000 miles and I already had about 4 different issues . I am waiting for 2011 going to trade it for rubi , world ends in 2012 so I would only have a year of payments
You'll only have 1 years worth of payments. LOL that was good!
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Old 01-18-2010, 09:04 AM   #6
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Mudbug, I have on occasion, especially with my first jeep 08 Sahara Unlimited, experienced a kind of funk that the engine would get into. It happened many times in the Sahara. It has happened about twice in the Rubicon in a year and a half. It happens when I get a little heavy on the clutch while starting out and then the engine gets into the funk. It is still running but barely and no power. I try to avoid it by keeping the rpms up while starting out (better coordination between clutch and gas). At least if I stalled it I would just be embarrassed a little and move on but the extra complication of the engine still barely running has added frustration to my driving experience. Don't know if this is the same as your experience but offered it in case it is. If it is the same, I'm thinking that it is some programming glitch having to do with the electronic throttle and engine speed. I'm speculating.
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Old 01-18-2010, 03:39 PM   #7
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The crazy thing that is worrying me is the metal on metal sound , and it sounded like it was coming from the engine , checked oil level its fine , no shavings in oil either . Just had to leave work early because my fiance was driving it and it happened again grrrrrrrrrrrr . 1 more thing is those 3 lights come on abs tcp and something else not check engine and that doesnt make sense because the engine is trying to stall or something and all those lights deal with braking . Im scared after reading a couple post my engine is goin to lock up .
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Old 01-18-2010, 04:26 PM   #8
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Sorry its a 07 not 08 , also called service dept to see what recalls were done to jeep , they said the only 1 was a ECB module , door locks etc , the reason I did that was I was reading how alot of 07 owners were having issues with there jeep stalling or about to stall , has anyone had any issue with this and if so was it a recall that fixed it?????
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Old 01-18-2010, 05:36 PM   #9
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hill checked all connections with battery and had battery tested alls good there , its driving me crazy with the grinding motor noise when it happens , and you only hear it when it happens when gas is depressed , as soon as you let of sound goes away .
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Old 01-19-2010, 06:36 AM   #10
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hill checked all connections with battery and had battery tested alls good there , its driving me crazy with the grinding motor noise when it happens , and you only hear it when it happens when gas is depressed , as soon as you let of sound goes away .
Does it sound like a coffee can full of ball bearings?

If so, what oil and filter are you running? If it's a top-end noise and not just starved injectors, we have to think about cold-start flow dynamics.
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Old 01-19-2010, 08:28 AM   #11
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Are the new jeeps throttle by wire now?

It wont really explain the metal sound but it could explain lack of power if it is and the pedal is goofing up.
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Old 01-19-2010, 08:31 AM   #12
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Are the new jeeps throttle by wire now?

It wont really explain the metal sound but it could explain lack of power if it is and the pedal is goofing up.
Yes they are and that's what I was thinking at first. Either the ecu voltage being low at first or the fuel injector voltage.
The ground wires on the JKs and the OE battery terminals are very very flimsy.
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Old 01-19-2010, 08:34 AM   #13
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Just throwing another thought out there but what if the clicking noise heard was the fuel injectors firing but they were more noticeable due to the engine being quite since it wasn't up to speed?

I am curious as to what oil you are running as well.
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Old 01-19-2010, 01:50 PM   #14
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When mine goes into this bad start funk, I usually just put my foot on the brake while the clutch is engaged to kill the engine or turn the key off and restart it on the fly with the clutch disengaged and then I'm on my way. I figure that teasing the engine with the gas pedal just isn't good so that is why I kill it and start over. I just about never have this happen now with the Rubicon and I'm thinking it is because of the lower gearing is more forgiving on me for uncoordinated starts. And after just over two years of ownership of both jeeps, my clutch foot is much better coordinated now. When I had the first jeep (Sahara Unlimited) when it did the funk, and I applied the gas, it didn't sound too good, that is why my response now is immediate kill and restart.
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Old 01-19-2010, 02:00 PM   #15
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Did you get the alternator tested as well? When the alternator died in my 300M, it exhibited similar traits as the battery ran down. Were any codes thrown?
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Old 01-19-2010, 05:01 PM   #16
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royal purple oil , it went to stealership this afternoon will let you know what
they say
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Old 01-19-2010, 05:02 PM   #17
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Does it sound like a coffee can full of ball bearings?

If so, what oil and filter are you running? If it's a top-end noise and not just starved injectors, we have to think about cold-start flow dynamics.
It sounded like when your brakes are very bad , a growling metal on metal noise
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Old 01-20-2010, 04:24 AM   #18
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well it's good oil, I'm assuming you're using the oem weight?
The lack of power really sounds like a bad gas pedal. But the sound that goes with it has me baffled.
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Old 01-20-2010, 05:24 AM   #19
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I am waiting for 2011 going to trade it for rubi , world ends in 2012 so I would only have a year of payments
Thats a great idea!
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Old 01-20-2010, 06:18 AM   #20
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royal purple oil , it went to stealership this afternoon will let you know what
they say
5w-20?

There are 5 or 6 quick things that I have in my head related to bad injector performance or top-end lubrication flow dynamics.
Curious to see what the Mopar-trained certified genuine Jeep mechanic driveability specialist thinks.
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Old 01-20-2010, 06:24 AM   #21
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Not to post off subject but I started using Amsoil 0w-20 100% synthetic because that's what they recomended. I know it's different than what they recomend but Amsoil came highly recomended. Is this ok?
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Old 01-20-2010, 06:30 AM   #22
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5w-20?

There are 5 or 6 quick things that I have in my head related to bad injector performance or top-end lubrication flow dynamics.
Curious to see what the Mopar-trained certified genuine Jeep mechanic driveability specialist thinks.
Hilldweller,

Speaking of engine lube, I complained about having to put in a quart every 3,000 at the last PM by the dealership and they put in 5W30. Is it possible that the new oil weight is producing better torque? I'll be curious if the consumption will be down at 3,000 on this PM cycle.

Now, back on topic. The metal on metal sound is definitely worry-some. Mine sounds more like a box of marbles being shook up when it gets into the funk I described earlier. Kind of like detonation after the key is turned off.
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Old 01-20-2010, 06:52 AM   #23
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Hilldweller,

Speaking of engine lube, I complained about having to put in a quart every 3,000 at the last PM by the dealership and they put in 5W30. Is it possible that the new oil weight is producing better torque? I'll be curious if the consumption will be down at 3,000 on this PM cycle.

Now, back on topic. The metal on metal sound is definitely worry-some. Mine sounds more like a box of marbles being shook up when it gets into the funk I described earlier. Kind of like detonation after the key is turned off.
More torque from thicker oil? Only if you weren't producing sufficient oil pressure from the 5w-20 ---- and that's not likely at all.

If you look at high performance websites you'll see that there are growing problems with top-end lubrication with newer vehicles. The galleys and passages are smaller, better machined, tighter. Some of them are starting dry and oil doesn't get up there during a start, especially a cool start.

My MINI (and a few hundred thousand others) made the canful-of-marble noise on cold starts; it has a turbocharged direct-injected 1.6L Citroen/Peugot engine that makes lots more hp and torque than my Jeep...
The immediate cure for the symptom was a switch to 0w-30 oil; then manual was calling for 10w-30.

I would think that the Jeep would respond similarly to 0w-20 (that's what I run in cool weather anyhow).
The old meat-head mentality of "you gotta run thicker oil" is based on 1969 396 Chevy engines with high-duration cams, etc.; they needed viscosity to make up for sloppy tolerances in the build.

Hard to believe that your dealer uses 5w-30; I would only use that in the desert in the summer...
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Old 01-20-2010, 06:56 AM   #24
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So, I'm wondering then why they used it? Will it consume less over 3000 miles?
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Old 01-20-2010, 07:00 AM   #25
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So, I'm wondering then why they used it? Will it consume less over 3000 miles?
Quite possibly.
Also, if you put a bandaid on a bullet wound you'll bleed less. But you'll still die until you correct the actual condition, remove the bullet.
If you're using oil, higher viscosity oil is just a bandaid. And is it worth the condition of top-end oil starvation anyhow? That's more wear and tear than losing a little oil...
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Old 01-20-2010, 07:11 AM   #26
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A lot of manufacturers are going to a lighter oil due to it causing less resistance with the rotating mass in hopes of increasing mileage and performance. The only thing I can figure is that they don't go to a better quality product in the fear of increasing cost, and consumers balking at the increased expense since we all complain about oil changes anyways.
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Old 01-20-2010, 07:12 AM   #27
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5w-20?

There are 5 or 6 quick things that I have in my head related to bad injector performance or top-end lubrication flow dynamics.
Curious to see what the Mopar-trained certified genuine Jeep mechanic driveability specialist thinks.
5W 30 , Just like jkn they told me same thing . One other thing is when your looking at engine from front bumper it seems to me like the right upper bank lifters are making more noise then the left , that could just be my paranoid state of mind thinking $$$$$$ at this point .

Also I have had that weight of oil in the jeep for 2 months now and never had a issue till now , I cant recall the filter but I beleave it is a Mobil 1 filter
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Old 01-20-2010, 07:16 AM   #28
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Hill why do you think the BAS ABS and TCP lights are coming on when this happens
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Old 01-20-2010, 07:53 AM   #29
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Hill why do you think the BAS ABS and TCP lights are coming on when this happens
That's why I asked about battery and grounds, etc.

I just swapped out my battery for a new Red Top (from our fairly new factory in Mexico...) and went about the ritual of cleaning my connections, spreading dielectric grease, etc.
Horror! Corrosion! Ick.
2 hours later and lots of sulfate flakes on the floor, my headlights are brighter, the engine bursts to life, and food tastes better to me.
I made up that last part.

It has a CAN-BUS; I'm suspicious of everything in it...
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Old 01-20-2010, 12:50 PM   #30
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Quite possibly.
Also, if you put a bandaid on a bullet wound you'll bleed less. But you'll still die until you correct the actual condition, remove the bullet.
If you're using oil, higher viscosity oil is just a bandaid. And is it worth the condition of top-end oil starvation anyhow? That's more wear and tear than losing a little oil...
So, I'm concluding that you are saying put up with the consumption to keep the top end parts happy.

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