Archived Bucking Truck

[JTBMC]

Bucking / Shuddering Truck

Howdy,

I just got back from Gatlinburg Tenn. and had an excellent time.



Help Needed.

While pulling my Horse trailer, only 7000#'s loaded, I blew an inter- cooler conection hose, of course it was Storming. I was forced to travel about 5 miles on flat ground to a safe repair place at a rest area. It was the Hose just below the Turbo, no problem, cleaned it up re-installed and off we go, then I developed a Buck while going up hills, with the cruise control on or off at 70 MPH. All Turbo conections are tight with out damage and it will Boost to 36 Pounds right quick.



At 70 MPH with Over Drive engaged the Truck seems to Buck forwards as the boost rises to 21 PSI thru 32 PSI. I thought it my be my EZ Fueling & De-fueling, so I stopped and change the EZ from level 3 to level 2 and then to level 1. The bucking stopped for awhile and after about 30 minutes it came back as bad or worse.



It does not Buck on flat ground only on the up hill pulls when the boost hits 21 PSI and higher



It does not Buck with the Over Drive off at any Boost PSI.



To make matters even worse I lost the little cover for the EZ, it fell in to a black hole in the fender well and ain't been seen sense. Darn Gremlins.



After making it home and dropping the trailer, it went out for a test ride, with the EZ back on level # 3 it doesnt buck but I can feel a slight vibration pulling hills with OD engaged .

Ive never experinced a Torque Converter shudder

or over drive slipping and not sure what to look for.



The trans oil is clean and full with less than 5000 miles on the change.

Using Mopar ATF plus 3 and Mopar filter

Trans temps never went over 145 degrees in the Mag Hytec Deep pan on the entire trip



Lift pump presures are 15 # at Idle 12 #'s across the filter

EGT's are 850 to 1050 degrees on long up hill pulls and about 800 on flat ground.

I'm going to change fuel filter in the morning.



Thanks , TJ

 

[Missouri Mule]

TJ,

Two possibilites mechanical or electrical.

Overdrive gear,overdive clutch.



Electrical, Engine speed sensor (crank speed sensor) Throttle position sensor (most likely) trans temp sensor,trans speed sensor, wires/connections/commponents (sensors).

 

[MCummings]

Maybe the "Boost Fooler" in the EZ Died.



The Bucking over 21PSI Might be the ECM trying to Defuel.



Might want to check and/or grease all electrical connections that the EZ uses.



HTH

Merrick Cummings Jr

 

[Greg Boardman-RIP]

Unplug the EZ and go for a long drive..... Longer than 30 minutes

 

[MCummings]

Originally posted by Greg Boardman

Unplug the EZ and go for a long drive..... Longer than 30 minutes

I thought you were going to say,,

Go for a long drive,,,,, off a short Pier.



hehe,, But TJ,, don't do that



Merrick Cummings Jr

 

[JTBMC]

If I unplug the EZ do I have to remove the Boost Elbow and replace with the stock one, or can I just remove the little blue jumper conector in the EZ.



I will check all the conections, If those sensors are bad do I have to go to Dodge for a diagnois and get pluged in to thier computer,

what are my options for not going to the Dealer.

Thanks Guys, TJ



I've already been for that long walk off a short pier, just not in this truck. YET

TJ

 

[Greg Boardman-RIP]

If you unplug the EZ you will unplug it from the obdII port. Not the map sensor. Then you can unplug it from tne map sensor if it still bucks. Then, Yes, If you do not remove and replace the boost elbow you will set of engine check light. Not a big deal though. It will reset itself in a day or two. I would drive the truck the same way as when you were having your problem. With the EZ off if yoy have the same problem, You have eliminated the EZ.

You can PM me if you need more help. Or call. 760-217=1238. I had the same problem with a box on my truck so I have an Idea what to do... .

 

[JTBMC]

Greg,

I un-pluged the Data Link OBD II conection and drove it just like I stole it and pulled the identical load.

There is no Bucking un-pluged. Pluged in and she Bucks like well you know.

I even blew off that same inter-cooler conection hose at 36 Pounds of boost at 85 MPH no Bucking pulling the hills. Fixed the hose and tested some more.

Man I tell you, DD#1 injectors with out the EZ turned on and this thing is no fun.

Thanks for the advice, but where do I go from here. Edge Comp I presume.

TJ

 

[Greg Boardman-RIP]

From here I would call Aaron at Edge Products. You can get the number off the website. Or call your vendor and ask for his help.

 

[JTBMC]

Called Edge this morning and was told to ship my EZ back and they would repair it or I could chose to upgrade to the Pulse or the Comp. The Comp is on the way.

Thanks Greg, MCummins,& Bill for your help and thanks to Edge Products for their commitment to excellence.

Thank Again, TJ

 

[Greg Boardman-RIP]

While they are at it have them chip it

 

[DEZLPWR]

Originally posted by Greg Boardman

While they are at it have them chip it

What does that mean? Do you mean make it a "Drag Comp"?

 

[Greg Boardman-RIP]

Yes, The drag Comp... ... ..... Much better

 

[DEZLPWR]

I have been wanting to swap mine out for some time now, but I can't be without my Comp for a week or 2!

 

[Greg Boardman-RIP]

I took the advice of a bomb addict before I got the comp. It doesn't defuel at all anymore.