Hey guys put on your thinking cap and see if this can be fiqured out..

Frist off this is what was dont to the truck in the last week.

new (rebuilt injectors) new right front tire,, thats it

ok new injectors was installed due to a ruff start up somtimes all 6 was changed,, truck ran great after they was installed .

new tire ,, ok i had it balanced again and it was ok ..

So here is whats going on ,, for the past few days i been getting a vibration around 60 mpr,, thought it was tire ,, well nope its not, this is why i know it not. today i was sitting in the drive way and giving it some gas raising the rpm,s just about 1000 vibration,, smooths out ,, about 1400 rpm vibration then smooths out .. 1800 rpm bad vibration,, above that its smooth,, so i went for a drive and yep at 60 mpr its at 1800 or so rpm,s and vibration,,, ok when its vibrating and i give it some fuel it smooths out or if i let off of the fuel all toghter it smooths out, the only time i feel it when i am driving is at 60 mpr, so what do you guys think injector,s,, t/q
flex plate ???????????????????????? i dont think its the trans becouse when i was checking it the drive way it was in park

what and where should i start checking????????

I really dont want to drive the truck the way its running , so it will be sitting untill i get this fixed

and thanks for any help
Jman

 

does the auto have some kinda 2 piece flywheel like the g56, i would say it has to do with balance on the crankshaft

 

Most likely you have a manual trans truck... correct....then you have a Dual Mass Flywheel that is coming a part. Coming problem with them, possible warranty issue. Check your coverage before you put out any $$$

 

Sorry about that

Its a auto trans

Jman

 

No problem I'll put my thinking cap back on.

 

Possible torque convertor or flex plate. Also check vibration dampener bolt torque and alignment of marks. Engine mount bolts torque and missing or loose bolts to engine block and mount bracket. Torque convertor bolts are tight or possible cracked flexplate. Pull cover and with flashlight see if any rust marks on flex plate could indicate a crack or loose bolts.

 

thanks i will check that in the morning,,i did use the front dampner to turn the eng to adjust the valves when i did the injectors but i used the bolts on it , i dont think i hurt it doing that but who knows

i live by Sun Coast Converters and will be going there tomarow to talk to them, i have been thinking its seam to have to have a lot of rpm to get going good with my GN trailor hooked up ,, about 2000 to just to get a good pull going

and i will be taking my old injectors in to pensacola diesel to get them tested and rebuilt, just in case i need to change them out again,,I all ways go back to what was done to try to find out whats going on and been thinking the injectors i put in are bad ,, but i dont know if the injectors will do whats its doing now ???

i had looked at the motor mounts and cant see anything wrong with them, but again there is just so much you can see there

Thanks for the help , this has been really getting me upset trying to find something
Jman