Johndeere 6620

[Alecb]

Hi

My jd 6620 started misfiring, I looked on the error code and it ECU 001347.07 problem with fuel supply,
Any idea what caused that,
Thankyou .

 

[nick...]

Dirty fuel or filters
Nick...

 

[KB6930]

That's a fairly generic code that comes up for a whole heap of reasons but will likely be something to do with fuel pressure

 

[Alecb]

That's a fairly generic code that comes up for a whole heap of reasons but will likely be something to do with fuel pressure

Thankyou, I've been told theres a pressure sensor/valve on the pump do you think it could be something to do with that?

 

[KB6930]

Could be that or filters or injectors but yes the suction control valve could be the fault if it's a common rail engine

 

[Alecb]

Yes it is common rail, it doesn't seem to smoke much I thought if it was injectors it would smoke quite a bit wouldn't it?

 

[KB6930]

We just had injectors done on our 79 it smoked before and still smoked afterwards but that code isn't coming up anymore I tried the suction control valve first as I've cured others with them before

 

[Cmoran]

Could be your fuel lines they do perish after few years I’d start there.

 

[Alecb]

I suppose the suction control valve would be a cheaper option to start with then go onto injectors if that doesn't work

 

[Alecb]

Could be your fuel lines they do perish after few years I’d start there.

Do they leak though when they perish

 

[Cmoran]

Do they leak though when they perish

Usually let air in we have found

 

[Timbo]

Go right through the LP side of the fuel system before you start blaming injectors or HP pump...

That includes the tank strainer, ALL the fuel lines (if they're more than a couple yrs old JD braided type, they'll want replacing) the lift pump, filters and the water separator bowl O rings. Give the terminals on the rail pressure sensor plug a gentle squeeze to make sure they are grasping the pins in the sensor well.

When you have done that come back if the fault still exists.

 

[Alecb]

Usually let air in we have found

Go right through the LP side of the fuel system before you start blaming injectors or HP pump...

That includes the tank strainer, ALL the fuel lines (if they're more than a couple yrs old JD braided type, they'll want replacing) the lift pump, filters and the water separator bowl O rings. Give the terminals on the rail pressure sensor plug a gentle squeeze to make sure they are grasping the pins in the sensor well.

When you have done that come back if the fault still exists.

Good man thankyou I've just brought all new pipes so I'll give that a go in the morning

 

[Will 1594]

There is a sensor on crank and back of pump , ours ran a bit rough and it was one of the sensors , doubledays sorted it ,so dont know which one it was ,worth a look

 

[Alecb]

There is a sensor on crank and back of pump , ours ran a bit rough and it was one of the sensors , doubledays sorted it ,so dont know which one it was ,worth a look

Yeah theres one on the front and one at the back of the pump isn't there ? Thanks I'll check it out

 

[Alecb]

Go right through the LP side of the fuel system before you start blaming injectors or HP pump...

That includes the tank strainer, ALL the fuel lines (if they're more than a couple yrs old JD braided type, they'll want replacing) the lift pump, filters and the water separator bowl O rings. Give the terminals on the rail pressure sensor plug a gentle squeeze to make sure they are grasping the pins in the sensor well.

When you have done that come back if the fault still exists.

Hi mate
I've replaced all the hoses and checked strainer etc and put a new o ring on the glass bowl, it's a lot better but it does still change tune when on tick over and the code came back up, any more ideas please
Many

 

[Timbo]

I'd say shes still sucking air somewhere, but you've improved it to what it was.

 

[Alecb]

Yes definitely 80 percent better