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ben
Dodge Dakota
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1/06/2005
09:21:55
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 Subject: RE: Bucking Dakota - Distributer gear?
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same speed and this might sound strange but mine got worse the rougher the road. i think it was less than $100.00 to fix.
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Eric
Dodge Dakota
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1/06/2005
10:04:48
|  RE: Bucking Dakota - Distributer gear?
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Great description "Mine seems to miss between 55 and 65, let off the gas, fine, push on the gas fine. when I hold speed feels like it's missing but no change in rpm"
Try to hold the truck at that speed/rpm and the truck jerks to the point that you hear the rear pinion slap. You know the noise the pinion makes when you go from drive to reverse while siting still. It is not the rear. I replaced that too.
Ben what did you spend 100 buck on to fix your particular issue?
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Eric
Dodge Dakota
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1/06/2005
10:06:17
| RE: Bucking Dakota - Distributer gear?
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Never mind Ben I re-read the stream and figured out it was the distributer gear you spent the $100.
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fastyz400
Dodge Dakota
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1/06/2005
14:19:35
| RE: Bucking Dakota - Distributer gear?
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have you tried to see, if there are hair line cracks on the rotor in the distributor, or even hair line cracks on the distributor cap itself.
How old are your plug wires?
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Eric
Dodge Dakota
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1/06/2005
16:01:05
| RE: Bucking Dakota - Distributer gear?
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I have replaced the Cap, Rotor, coil and all ignition wires.
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Jim
Dodge Dakota
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1/07/2005
01:44:25
|  RE: Bucking Dakota - Distributer gear?
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Fixed, Mine was the tps
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Red99Dak R/T
Dodge Dakota
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1/08/2005
09:43:50
| RE: Bucking Dakota - Distributer gear?
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When the missing arises, has anyone thought to use a good grade of Injector cleaner for a couple tanks? Also, I hear said speeds of 55-65MPH but has anyone had the same problem at a different speed in a different gear at about the same RPM?
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Eric
Dodge Dakota
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1/08/2005
10:12:46
| RE: Bucking Dakota - Distributer gear?
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Periodically I have used STP for a few tanks and Berkley for a few tanks. No noticeable difference in any aspect to Bucking, mileage, performance etc. . Oh yea marvel mystery products.
I can duplicate the bucking. If I place the truck in first or second gear and run at roughly 2000 rpm.
I do notice a difference that is far less bucking if any when I tow my bass boat or haul a load over 200 lbs. The MOPAR mechanics think this is due to a change in ignition timing under a load. Hummmm. So I installed new timing gears and chain, new distributor shaft and gear, new plugs, new wires, new rotor, new cap and new coil.
I even installed a new not rebuilt trans with the over drive unit. This is truely a love / hate relationship. $5k spent toward the bucking and no resolution.
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Red99Dak R/T
Dodge Dakota
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1/08/2005
10:30:40
| RE: Bucking Dakota - Distributer gear?
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The only other thing I can think of is to take out the injectors, clean them and put them back in. No one has said anything about the injectors before, but maybe an injector gone bad? Just a thought.
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Eric
Dodge Dakota
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1/08/2005
10:55:14
| RE: Bucking Dakota - Distributer gear?
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I have never remove injectors before but I have rebuilt carbs. Is it difficult to remove injectors or do I need special tools? How do you clean an injector? I wonder if I can purchase new or replacement injectors?
Eric
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Red99Dak R/T
Dodge Dakota
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1/08/2005
13:24:51
| RE: Bucking Dakota - Distributer gear?
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You made me go out and look at mine, and I was amazed. I have the 5.9 l/360 Cu In engine and with mine all I have to do is take 4 bolts out that hold the 2 fuel rails out and unclip the injectors from them. Then the injectors slide out. from what I've seen others say, use some lithium grease on the O rings when putting them back in. Now, you can purchase new ones to put in available at Advance or Auto Zone, you can check your local parts stores, they should be available, or you can have then cleaned. I took the ones from my son's Saturn to NAPA and they sent them out to be cleaned. It cost $27.00 a piece to have them done. If you have a book, I would look at the procedures for removing them to make sure I'm right.
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Eric
Dodge Dakota
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1/08/2005
14:47:30
| RE: Bucking Dakota - Distributer gear?
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Tonight I need to finish priming my GTO but tomorrow I will try to pull the injectors. I guess to clean them myself should I use some kind of carb cleaner and an air hose to provide pressure.
Lithium grease on the seals? That weird but it sounds like a MOPAR solution.
Thanks for your suggestion. I will let you know the results.
So tell me is it worth the extra $ to have the R/T option for your 99 dak?
eric.morrisette.ctr@pfpa.mil
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Red99Dak R/T
Dodge Dakota
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1/08/2005
15:35:11
| RE: Bucking Dakota - Distributer gear?
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Eric, I don't know how you plan to do it, but I know I soaked my son's injectors in Carb Cleaner over night, and used a spray nozzel to do some blasting into the port, careful not to touch anything on the inside because I don't know how easy it is to damage it, but it worked a little, just that it was so bad we had to send them out. On your other question, I paid $11k for the truck in Dec, and it's been a long time since I've had a vehicle that I've had so much fun driving, even with all the issues I've had with it. I think that I will have to change out the Upper stream O2 Sensor and the Throttle Position Sensor, but neither one seems to be a major problem at this point, just that I have the Check engine light pop on from the O2, and the TPS once in a while has my TC go from Lock to Unlock then lock.
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wew446
Dodge Dakota
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1/18/2005
13:10:54
| RE: Bucking Dakota - Distributer gear?
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My 185,000 mile 92 CC 4x4 5.2 is having the same problems Eric. Mine seems to be worse when the motor is cold. After driving a few miles it seems to quit missing/bucking but then intermittingly does it at cruising speeds, seems to be when you let off and then slowly get back into the throttle. I have replaced, plugs, wires, entire distributor assembly with the oil pump driveshaft and bushing, O2 sensor, TPS, Crank position sensor, and finally did the computer this morning with no positive results. Fuel pressure seems to run around 39 and the diagnostic tester shows no codes but it does show desired idle speed fluctuating between 7200 RPM and 6700 RPM which is the only problem I can find. Anyone else have any ideas???
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wjones7405
Dodge Dakota
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5/21/2007
21:22:49
| RE: Bucking Dakota - Distributer gear?
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Wait GUYS..before you throw those dodge dakota's away I might have just found the problem to all this bucking that seems to be going on..After dealing with the same problem for about 6 mo.s and going throught about three rotors I have found that the upper bushing is worn on my distributer allowing the upper part of the shaft to wobble and knock out my rotors and cause the truck to buck with a no load condition..A new ( rebuilt ) one from a local parts house for 70 bucks should take care of all my problems..Take your cap off and try to wiggle the upper in and see if it is loose..It shouldn"t more at all if it does then theres your problem..
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OBIO3
Dodge Dakota
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5/22/2007
23:18:22
| RE: Bucking Dakota - Distributer gear?
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Adding a bit to WJones post. Yes the distributer is the most likely problem. The problem you are describing is RPM sensitive. More so mid range. This seems to be the range distributors can appear to be out of balance, not all but some. This will cause wobble in the shaft if the upper bushing is wore. Myself, I use a dial indicator to get an exact reading (thousands) of play there is. Your repair manual will tell you what is proper. The other thing I want to mention is breaking rotors due to this problem. This does not happen in all situations. Different brand caps/rotors are spaced a few thousands different between the rotor and distributor contacts. The most likely problem will be the wobble being sufficient to ground the firing components in the distributor momentarily at different points to cause the miss. There is no guarantee this is your problem but it's a good guess. If this is the problem for gods sake don't go buy a distributer. REPLACE THE BUSHING.
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scamper340
Dodge Dakota
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5/26/2007
03:25:43
| RE: Bucking Dakota - Distributer gear?
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I have a 2001 Quad Cab 4.7, 5-speed and am having the same bucking issue, usually at lower speeds. Exact same description as wew446's, "seems to be when you let off and then slowly get back into the throttle". Anyone have an idea what it might be? I was thinking throttle position sensor since I don't have a distributor. Before I start throwing parts at it, I figured I'd ask you guys.
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Massey
Dodge Dakota
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5/28/2007
21:09:55
| RE: Bucking Dakota - Distributer gear?
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On a distributor motor this is most likely the top bushing in the distributor. Also then time you are all talking about the bucking happening is when the vacuum advance is working, thus moning the pickup plate around. If the shaft is a little loose this will move the pickup away from the stator enough to cause a misfire or two. As mentioned before check the play side to side on the shaft. If your play is good and you still have the problem you should also check for smooth mechanical and vacuum advance movment. (If you have it in your truck) If you have some corrosion or dirt blocking free movment this can cause bucking.
DLI trucks the most likely cause of bucking and misfires as you come onto the throttle is the TPS. There is a simple test for this and it works best with an old school analog Ohm meter. Your repair manuals should have the resistance readings for the TPS and all you need to do is probe the output while slowly opening the throttle. The needle should move with the opening of the throttle and not jump up or down. If there is a spot where the needle jumps that means a flat spot on the potentiometer in the sensor and it needs to be replanced. This could also cause the same problem in the distributor models and even in some of the carburated engines that have the electronic carb. A digital meter can also be used but they dont seem to be as easy to see flat spots as analog meters do. I hope this helps.
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scamper340
Dodge Dakota
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5/30/2007
02:16:11
| RE: Bucking Dakota - Distributer gear?
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Thanks Massey, sounds like you know what you're taking about. I don't have a meter, but I think I'm going to try replacing the TPS, since it's easy to do and the symptoms point there. I'll let you know what happens.
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scamper340
Dodge Dakota
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7/05/2007
17:00:42
| RE: Bucking Dakota - Distributer gear?
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Sorry it took so long to reply to this thread, but the TPS made no change to my bucking problem. Seems to be getting worse the past couple of weeks. I also noticed that on occasion, when I brake hard and push in the clutch(4.7 manual), the engine revs big time. Scared me the first time it happened, I thought I had accidentally hit the side of the gas pedal when I was braking. It's also a little embarrasing, since it sounds like I have no idea how to drive a stick, lol. Any help would be greatly appreciated. Thanks!
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