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TxGrizz
Dodge Dakota
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11/19/2002
14:24:22
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 Subject: 5.9 Lack of power
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Ok, here is the scoop. I bought this truck used and do not know if this is normal. It is a 2000 4x4 QC Auto with the 5.9 engine in it. It has the LSD rearend in it with the stock gears. I am running 31's on it and i can not make it break the tires loose like i feel it should. After reading the different great posts on this board this is what have done so far to get some pep back in this pup!....New plugs, wires, cap, rotor, IAT sensor move, K&N filter, home brew intake, TV cable adj, TPS verification, new fluids in all locations, and i just finished the Crankshaft sensor mod. I think i got about 3-4 degrees out of it. The motor runs VERY smooth and starts before one full rotation of the flywheel. What could it be that is robbing the low end torque at launch? The only thing i can think of checking is the timing chain to see if i am a tooth off. Would my motor run this smooth if it was out? Sorry got so long winded just need a another head on this prob.....THanks in advance!
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Texas Todd
Dodge Dakota
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11/19/2002
14:36:56
|  RE: 5.9 Lack of power
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Tx,
No way it would run very smooth at all with the cam timing off, yes, it owuld run however,it doesn't sound like it's your prob.
It's a 4x4, QC, 5.9, so obviously an auto, and maybe, or probably 3.55 rear end gears, check your glove box.
Well, chime in here 5.9ers cause it may be all the punch you got out of it already.
Todd Bouton
Houston/Galveston TX.
01 QC 4.7 5spd HO cams, etc.
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Anthony G
Dodge Dakota
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11/19/2002
15:10:08
|  RE: 5.9 Lack of power
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31" tires take mucho power to break, second could be due to a torque managment on your PCM. If you can't break them loose in the rain then maybe you have a problem. I've seen worse, Ford 150 4.6L 230hp couldn't even break a peg legged rear end diff with WOT powerbreaking, with normal tires.
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TxGrizz
Dodge Dakota
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11/19/2002
15:24:49
| RE: 5.9 Lack of power
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Thanks for the input guys. My tires break loose fine on wet roads, slides sideways like a LSD will do. I do have 3.55 gears in it. I was just wasn't sure what it should do since i didnt buy it new. If anyone else has some input that would be great.....
Bill
DFW
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.alex.
Dodge Dakota
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11/19/2002
15:43:20
| RE: 5.9 Lack of power
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The diameter of your 31" diameter tires turns the 3.55 ratio into an effective 3.20 ratio. that may be the problem.
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TxGrizz
Dodge Dakota
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11/19/2002
16:20:00
| RE: 5.9 Lack of power
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What would happen to top end RPM and Gas mileage if i put 3.9 gears in it? I have been thinking of changing out the gears because i am also going to put 33's under it when i can afford to get them.
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.alex.
Dodge Dakota
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11/19/2002
16:26:42
| RE: 5.9 Lack of power
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If you are having trouble breaking the tires loose now, the engine may not be operating in its peak power band. If you change to a 3.92 gear, you may actually make some mpg back!
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TxGrizz
Dodge Dakota
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11/19/2002
16:44:31
| RE: 5.9 Lack of power
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Ok, making sense...Does anyone have a ballpark figure on how much it would cost to buy and get someone to install the gears. I am fairly competent with tools and can do most anything with a vehicle. What type of specialized tools would i need if i tried this myself? and how much of a savings would it be?
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.alex.
Dodge Dakota
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11/19/2002
16:56:51
| RE: 5.9 Lack of power
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If you've got a 4x4, you've got to do both differentials.
And setting up a differential is pretty damn complicated. To do it correctly.
Go to ring-pinion.com and look under the techs section. That'll give you an idea of what you're up against.
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TxGrizz
Dodge Dakota
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11/20/2002
09:38:41
| RE: 5.9 Lack of power
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Alex,
Thanks for the info. I was concerned with the shemming (SP?) that you have to do. I guess I will have to see how much a shop would charge me to do it. Since I am broke I guess I will have to wait until i get some duckies lined up.
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HSKR
Dodge Dakota
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11/20/2002
10:09:18
| RE: 5.9 Lack of power
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There is a group buy going on gears right now. Not sure if they can do the front axle gears though, but if you are looking to save some money, you shoudl buy the gears during this group buy. Look in the group buy area for more info.
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routesixtysixer
Dodge Dakota
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11/20/2002
10:14:40
| RE: 5.9 Lack of power
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I felt the same way with my 97 5.2 auto w/3.55 gear and 29.6-inch tires. I found a 3.90 gear set for my 8.25 diff on E-bay for $61! Gears had about 20,000 miles on them. Install kit was $108 at 4-Wheel Parts (local or website) and then paid a pro $180 to install.
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routesixtysixer
Dodge Dakota
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11/20/2002
10:21:15
| RE: 5.9 Lack of power
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I felt the same way with my 97 5.2 auto w/3.55 gear and 29.6-inch tires. I found a 3.90 gear set for my 8.25 diff on E-bay for $61! Gears had about 20,000 miles on them. Install kit was $108 at 4-Wheel Parts (local or website) and then paid a pro $180 to install. Definitely helped in the 0-30 area. I'm going to fill up today (first full tank since the gear change); appears to be about a wash on mileage, though, just like all my other mods.
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TxGrizz
Dodge Dakota
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11/20/2002
12:23:33
|  RE: 5.9 Lack of power
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66'r,
Thanks for the info. Now all i need is money! I should have never bought a v-8....Now all want to do is play with it and make it go faster!
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Texas Todd
Dodge Dakota
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11/21/2002
10:06:21
| RE: 5.9 Lack of power
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Shoot, damnit, hell,
That's WHY i got a v-8!
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DAHEMIKOTA
Dodge Dakota
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11/24/2002
00:01:07
| RE: 5.9 Lack of power
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Some Dakotas have anti skid brakes,differant than anti lock. If you try to brake torque to bust the tires loose and do a burnout the system sences the rear wheels turning when the brake is applied and applies more pressure to the rear breaks. It tries to prevent the rear wheels from spinning. Try applying the breaks then slam it to the floor and release the brake a split second after the pedal hits the metal. My 5.2L 4X4 with 3.55 LSD can smoke 'em no problem. If I try to break torque, it sits there and looks stupid and just grunts off the line. Of course the only reason to smoke the tires on the street is to impress peasents.
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ttdakota
Dodge Dakota
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11/24/2002
14:32:43
| RE: 5.9 Lack of power
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with the larger tires on the truck it causes the overall gearing to be higher. try replacing gears
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HSKR
Dodge Dakota
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11/25/2002
12:09:02
| RE: 5.9 Lack of power
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What are you smoking DAHEMIKOTA? Anti skid brakes?? Come on now, Don't mistake a lack of power for "anti skid brakes" Why woudl they makes a brake system to lock up the rear wheels?? Not something I would want to happen in my truck. What you are saying about your "anti-skid" brakes woudl hold true even if you released the brake for a split second to get the wheels spinning. It would still theoretically sense the wheels spinning with the brake applied and apply more power to the rear brakes to stop them. That is the exact opposite of anti-lock brakes and woudl be a huge safety no no for any engineer.Can you imagine driving down the raod and applying the brake to stop only to have the rear wheels lock up because they are still spinning with the brake applied??
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dan
Dodge Dakota
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11/25/2002
13:06:56
| RE: 5.9 Lack of power
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I don't thinks it's the 31" tires fault.
My '00 4.7 auto 4x4 lays down ridiculous amounts of rubber. w/ LSD and 3.55 rear end.
The truck is stock and spanks by brothers 5.9 Durango all day long.
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ram59d60
Dodge Dakota
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11/27/2002
22:53:07
| RE: 5.9 Lack of power
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you have a limited slip rear. not a lot of spinnin' goin on here. i have 2001 quadcab 5.9 dak, switched the 3.55 for 3.92. you are also 4x4, large tires, you are not going to spin em. if near houston area, call pyle bros. in baytown, they by far do the best work in gears. build for tractor pull trucks etc. very famous. cost me $850.00.
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Rosco
Dodge Dakota
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11/28/2002
11:34:02
| RE: 5.9 Lack of power
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I bet that you have the revised ecu flash!!! I bought a used 2000 5.9L QC 4x4 auto with 3.55 gears. It was just under warranty and I took it in to get serviced. Anyway they noticed that the truck had a slight pinging to it. So they reflashed my truck. It knocked so much off it that it's not funny!!! I was very upset!! When I requested that they undo what they did they claimed they could not and said I could go with Mopar pcm. Fark that I don't want to run on premium all the time and not be able to tow!!! Anyway I am considering the hypertech Power programmer. I am hoping that due to me having the retarded flash that it will remedy this problem plus give me a little extra to boot. The added bonus is that I won't have to use premium all the time and can tow with it. Now only if it was a little cheaper. I am still awaiting real results from the hypertech. Anyone dynoed theres yet???
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Kent
Dodge Dakota
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11/28/2002
20:18:51
| RE: 5.9 Lack of power
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I have a 2000 Durango and took it to the dealer once, and when I got it back there was no power. They did flash the PCM and took the power away below 3000(noticed when towing that over 3000 rpm had good power- under 3000 no power), could not even spin the tires on a single track.
I have 2 friends that work at my dodge dealer, they told me that they do this so they dont have to replace short blocks under warr. Got service manager to say same thing after a big baggering session.
The 5.9 engine needs premium gas and a colder thermastat, they use 195 stock to help pass emissions, but that temp will help with knock and ping.
cheap gas, hot day, 195 therm, towing, leak in intake = NEW SHORTBLOCK
Kent
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R/T Superbee
Dodge Dakota
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11/30/2002
00:03:04
| RE: 5.9 Lack of power
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I had a 98 Dak 5.2 4X4, I put all the stuff you did plus JBA headers, Performance II chip, dodge cat back and power pulley's. I could break the tires (only in 2 wheel drive). I now have a 00 Durango with all the same mods plus crower rr 1.7 lifters. And it is a dog off the line (doesn't have 2 wheel drive option). Dodge say's the only thing I can do is change the gearing, and I was told about $3,000 if you find it for less let me know.
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TXGRIZZ
Dodge Dakota
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12/03/2002
11:46:35
| RE: 5.9 Lack of power
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Does the PCM flash really pull that much out of it? I have performed the Crank Sensor Mod, will that counteract the PCM flash much? I have heard that you also need to look at how the fuel is managed but do not know how to affect that without buying the Hypertech power programmer but have not heard how well they work. Has anyone used one of those on this setup?
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Kent
Dodge Dakota
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12/03/2002
13:48:36
| RE: 5.9 Lack of power
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I friends at the dealership (been there a wile)told me that my flash took out 8 degrees of advance. That is what it felt like.
It was hard to spin the tires in the rain. Towing a trailer up a hill is what clued me in. under 3000 the truck would start to slow down fast, going over 3000 i could go up the same hill and speed up and have great power.
I dont think that using the hypertec would bypass the factory *uckup.
by a new PCM or have it flashed by aftermarket.
Mopar PCM on sale and at a great price manciniracing.com
where I get my stuff.
Kent
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