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OT 1999 Dodge Durango

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Ron Sorden

08-28-2006 11:31:39




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I know it's not tractor related but I am at my wit's end on this one. I also posted this on other forums but would like to get as many Ideas as possible.

My son has a 1999 dodge durango with a V-8. When driving down the highway it will suddenly sputter and miss (it does not backfire). He can take it out of gear floor the accelerator a couple of times and it straighten's right out for a while.

We have checked for water in the fuel, and bad fuel. Was goint to check the fuel filter but it's located in the fuel pump which is on top of the fuel tank! A replacement pump runs from $300 to $500 dollars plus $100 labor. My problem is I'm not really sure it is the pump/filter. I also know next to nothing about fuel injection systems (I'm just an old fart carburetor type).

Could this be related to the injectors and is there some way to test for it by a back yard mechanic?

Any info is appreciated. Thanks

Ron

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Ron Sorden

09-17-2006 18:20:40




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Thanks Guys/Gals for all the info and help. We went through all the steps as you suggested. Narrowed it down to the spark plugs. When we removed them, 3 of them showed evidence of blowby on the plug body. They (the 3) were also only finger tight. Put new plugs in anyway, torqued them properly and Voila!!!!! Problem solved. It runs like a top and he says he has a lot more power now. Thanks again.

Ron

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Thack

08-28-2006 22:29:21




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
If it doing that while he has the cruise on it may be the PCM. But check for vacuum leaks and bad connections 1st.

Also check for fouled plugs and replace the plug wires. EGR's sometimes get stuck open and cause hesitation, so check the easy stuff 1st including PCV, et cetera.



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steve in nc

08-28-2006 19:22:26




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Our shop had a similar problem with 3 or 4 other dodge products. They are "very" voltage sensative. We installed a new battery and cured the problem. One of the pick-ups had very bad missfire, the owner had put in plugs & wires, and was ready to trade. The battery fixed it!!
May not be your problem, but give it a try

good luck steve



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the tractor vet

08-28-2006 18:58:13




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Don't feel pregnet as we are having the same problem with the War Dept's 03 Durango with the 5.9 but it is still under warranty so i am not geting my hand dirty on this one for another month and it is going back in again for the same old thing as so far they have replaced all the plug wires changed out three sets of plugs two oxygen sensors and it is still missing but they have not yet changed the cap and rotor as they keep telling me that it is not showen any codes other then the day it was over there and i just happned to have one of it's missing sprees while they had it pluged and it missed on 7 of the 8 so they put a set of wires on it well two days later the War Dept come in the house just cussen and throwen things and tell me that it is missing again . Guess i am going to have to dig back into one of my old BLACK BOOKS and make a call to Detroit and start Motheren somebody up there. that is if the OLD phone #'s are still good numbers.

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Ron in Nebr

08-28-2006 18:13:16




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Are you positive that the only fuel filter on the thing is located in the pump inside the tank? Not real familiar with the Dodges, but on all the Ford and Chevy fuel injection vehicles there's a filter in the line between the tank and engine, usually tucked up in the frame channel someplace.

I've been wrong before, and if you do know for sure there's no other easily accessible filter, I appologize.

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Steven@AZ

08-28-2006 17:45:22




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Have you checked out/replaced the spark plug wires?

I've had vehicles give me an intermittent miss due to crossfiring/misfiring wires. Just my $0.02 worth of experience.



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Jossette

08-28-2006 16:47:02




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Hows the alternator doing

If it drops off so will the truck



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26Red

08-28-2006 14:49:02




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
I have the same situation going on with my dodge truck "97.... could be a number of things. I would start with changing the fuel pump, then move on to the injectors. The trick is to find the miss firing cylinder- usually #1 and 5, and 7. Also note that you may have a intake plenum leak- the 5.9l V-8 was known for that problem. That will cause rough running and excessive oil consumption...which leads to a smoked 02 sensor and a plugged cataalytic converter...

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El Toro

08-28-2006 13:56:07




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
I would install a fuel gauge to check that pump pressure. Had a Chevy with the 2.5L engine and it would run for a few days and then it would just quit running on its own. The strange thing that it would start right up like nothing was wrong. Did tuneups, but it kept stalling.

I installed a pressure gauge after the fuel filter and I kept watching the pressure. It never seem to change that much until I decided to accelerate up a hill and I noticed the pressure dropped a lot. I had always thought it was a fuel problem.

Drained and pulled the tank and pulled out the fuel pump and the sock over the pickup tube was covered with rust and dirt. Surprised me that it ran at all. Vacuumed out the tank and installed a new fuel pump with a new sock. That cured the stalling. I bought the fuel pump from Pep Boys
for around $50.00 and it had a lifetime warranty. Hal

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Bob

08-28-2006 15:56:50




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 VACUUMED OUT THE GAS TANK?????? in reply to El Toro, 08-28-2006 13:56:07  
UNBELIEVEABLE!

Apparently, you haven't seen the "stupid human tricks" videos of what can happen when gasoline vapor is exposed to the sparking brushes inside a vacuum cleaner motor!!!

"HOLD MY BEER, AND WATCH THIS!"



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El Toro

08-28-2006 17:03:15




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 Re: VACUUMED OUT THE GAS TANK?????? in reply to Bob, 08-28-2006 15:56:50  
Couldn't been too bad I'm still here writing you. Hal
PS: Did you ever see a gas tank being welded on with just air blowing through it? Our local radiator shop did this.



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Bob

08-28-2006 17:30:05




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 Re: VACUUMED OUT THE GAS TANK?????? in reply to El Toro, 08-28-2006 17:03:15  
I did that, too, in my younger days. The THEORY is that the movement of air keeps the mixture too lean to explode.

I don't do that anymore. I don't want to make my wife and kids RICH!



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Bob

08-28-2006 17:30:03




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 Re: VACUUMED OUT THE GAS TANK?????? in reply to El Toro, 08-28-2006 17:03:15  
I did that, too, in my younger days. The THEORY is that the movement of air keeps the mixture too lean to explode.

I don't do that anymore. I don't want to make my wife and kids RICH!



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Bob

08-28-2006 17:30:02




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 Re: VACUUMED OUT THE GAS TANK?????? in reply to El Toro, 08-28-2006 17:03:15  
I did that, too, in my younger days. The THEORY is that the movement of air keeps the mixture too lean to explode.

I don't do that anymore. I don't want to make my wife and kids RICH!



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Nat 2

08-28-2006 12:07:44




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 Re: OT 1999 Dodge Durango in reply to Ron Sorden, 08-28-2006 11:31:39  
Had a '97 Chevy that never ran right from new. I'd drive it until the service-soon light came on, take it to the dealer, they'd never find anything wrong. They'd change the plugs, wires, and cap, run a can of fuel injector cleaner through, then send me on my way. It'd run good for about 5 miles, then start bucking and sputtering again.

Took it to an independent mechanic, and they couldn't find anything wrong either... Ran diagnostics and troubleshot for three hours straight... Nothing wrong. Guy called me up all pi$$ed off, "Get this d*mn thing outta here! Runs like crap but we can't find anything wrong." Didn't charge me for the time, at least...

Welp, finally it quit in my parents' front yard. Wouldn't start. It blew the ignition coil twice before... That wasn't it. Throttle position sensor was making a weird noise... That wasn't it. Finally towed it to yet another garage... This guy tested the fuel injectors (CFI). One wasn't firing at all, two others were only firing about half the time, and the other three were missing occasionally.

So yeah, it could very well be fuel injectors, but no, there's no way for a backyard mechanic to reliably test that theory.

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