How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Wayne Your Own Question
Wayne
Wayne, Journeyman
Category: Agriculture and Farm Equipment
Satisfied Customers: 9823
Experience:  34 + years as a mechanic
6825259
Type Your Agriculture and Farm Equipment Question Here...
Wayne is online now
A new question is answered every 9 seconds

Deere 7820 will crank but no start. If I supply alternative

This answer was rated:

John Deere 7820 will crank but no start. If I supply alternative fuel it will start but then die. I have used the hand primer and have fuel to the side of the head. Can I get some trouble shooting help on this machine

Hi I'm Wayne

I see you been waiting awhile

do you still need help with this ??

Customer: replied 1 month ago.

Hi

Does the fuel filter run dry ??

does the primer pump get hard when you pump it ??

Customer: replied 1 month ago.
The pump gets harder but not solid. The fuel lines that supply the fuel rail come out of the top of the fuel pump. Correct? Are the lines connected to actuators? I ask because there are electrical connectors in the top of each one and I do not have power with key on or cranking. I didn't know if I should and if that may be the problem possibly.

HI

Sorry for the delay

Site is having some sort of a delay , posting back messages

check all your fuses , yes should have 12+volts to connectors

if all fuses are good , and wires are all good, no bare ,rub spots

then your ECM is faulty , have that checked, remove and bring in for test

I hope this helps you

Hi. If this helped you

Please rate my answer 3 or more stars.

That is the only way I get credit for the question

or the money you paid stays at JA and I get nothing for my time.

If you need more info use the REPLY button

Not the Poor/Bad service.

Wayne

Morning

Just following up with you

did my answer help you ??

Please remember to rate my answer

or the money you paid stays at JA

and I get nothing for my time

Wayne

Customer: replied 1 month ago.
Where are the fuses? I have only found relays

Hi The fuses are in the relay block

Hi. If this helped you

Please rate my answer 3 or more stars.

That is the only way I get credit for the question

or the money you paid stays at JA and I get nothing for my time.

If you need more info use the REPLY button

Not the Poor/Bad service.

Wayne

Customer: replied 1 month ago.
Can u get me the ecu wiring diagram

HI

I will look to see if I can find it

Hi

Also do you have any codes showing ??

Customer: replied 1 month ago.
My scan tool will not communicate to get codes

Hi

OK , can not get codes , lets start over

you say If I supply alternative fuel it will start but then die.

how are you doing this ??

Customer: replied 1 month ago.
Gas on a rag over intake tube

Thank you for that

same as using starting fluid

1st you need to check if you have power that the fuel shut off solenoid

if no, check all fuses ,as I suggest earlier

if yes , the shut off solenoid is faulty

Hi. If this helped you

Please rate my answer 3 or more stars.

That is the only way I get credit for the question

or the money you paid stays at JA and I get nothing for my time.

If you need more info use the REPLY button

Not the Poor/Bad service.

Wayne

Customer: replied 1 month ago.
I believe this machine has 2 shutoff solenoids on the top of the fuel pump. Can u verify this? If in fact that is what they are we do not have and power to them. We have checked all the fuses.

Hi

It only has 1 solenoid on the pump;

not sure what the 2 on the top are

JD does not allow pictures on a lot of there parts

but here is the kit for the shut off solenoid click here

Wayne and 2 other Agriculture and Farm Equipment Specialists are ready to help you