I have the same fuel problem. Checked everything. Diagnostics say solenoid bad in injector pump. Dealer suggest putting a rebuilt one on. He also stated they are having a lot of problems with these injectors. Seems John Deere would make them right or at least help. Please let us know if you have any succes with corporate!!!
Deere 6420 rough running
- Thread starter Jeff Thomas
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If your fuel filter has the glass sediment bowl on it make sure the gasket is still between the filter and the sediment bowl because it will run fine for a while before it starts to suck air from here without leaking fuel also just go ahead and replace all the fuel hose and replace the squeeze style hose clamps with good screw type
Thanks TX Deere, we have checked all those things and replaced all fuel lines. Talked with the dealer again yesterday, my problem is not the first to to come through that dealership. Several more have had the same issue. Only thing that seems to fix the problem is a new injector pump. They stated that Chevy had used the same pump on some engines and were experienceing similar problems. Seems pump replacement is the only option. I have truly tried every other potential issue to no avail. Will let u guys know if it works, I have one on the way!!
Jerry/MT
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It sounds like fuel delivery issues. I would make sure that you don't have some crud in the fuel tank that's clogging the tank outlet and/or fuel line itermittently. With low fuel in the tank, you might consider removing the drain collecting the drained fuel and seeing what you have in the tank. It might surprise you! Water and algae are common problems with diesel fuel. Was there any evidence of debris in your fuel line or the filter when you changed them out? (I bought a used tractor out of New Mexico and I had aproblem ith water in the fuel. It surprised me because the humidity is very low there but the PO might have had a contaminated storage tank.)
My neighbor has a 6420 and he's had a lot of problesm with lift pumps (multiple replacements) but as far as I know, that has resulted in an inability to start. However intermittent operation of the lift pump can cause a problem with fuel delivery.
Make sure all the fuel connections are tight so they don't suck air.
Don't replace/rebuild the pump until you have eliminated all the more likely possibilities.
tjnoonanndt
New member
if tractor is common rail do not open injector lines. if it is common rail it sounds like a suction control valve your jd mech prob checked codes look out for ecu 1347.07
mini
New member
I have a 6320 that on a cold day after the first startup of the day it will run for about 10 minutes and then start missing badly. Shutting it down for about a minute or two and recranking solves the problem for the rest of the day. This tractor never has this problem on a hot day or during the summer. Anybody had this problem?
MBBuilders
New member
I know this thread is old. but if anyone is still having problems. I purchased a 6420 in 2016 it was a nightmare.
Hi eng temp, hi trans temp. injector pump solenoid And every other code possible, (28 in total) all at different times. it run for weeks then out of the blue it would start running rough then stall, it would start up run for a few seconds and die, Jd tech re programmed ecu, it ran for a few days and started all over again, I found the problem last summer, there is a short wire harness going from ecu into the cab 16 inches long had a tiny nick in the wire and would short out. replaced wire all fixed
Hi eng temp, hi trans temp. injector pump solenoid And every other code possible, (28 in total) all at different times. it run for weeks then out of the blue it would start running rough then stall, it would start up run for a few seconds and die, Jd tech re programmed ecu, it ran for a few days and started all over again, I found the problem last summer, there is a short wire harness going from ecu into the cab 16 inches long had a tiny nick in the wire and would short out. replaced wire all fixed
beenthere
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How in the world did you find that nick? tks for posting your "find" and solution. Nightmare for sure...
MBBuilders
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It was by chance, after Jd tech come out and his fix didn't work, desperation set in. I knew it was going to get real expensive so started chasing wires starting at injector pump. everything looked good, then open up fused panel and started pulling on plumes of wire and would hit the key. the third wad of wires I wiggled around it popped off played with a little more and didn't take long after to track down. I repaired the wire first with black tape, but ended up replacing most of the wire. the nick in the casing let moisture get in and corroded the wire, was going to replace harness but it was just under $500 dollars for 16 inch harness.