New here and I'm hoping someone can help me on this engine fuel system in a Massey Ferguson combine 2000 year 8780xp?
It is a long story saga so bear with me.
Have I posted this in the correct area?
Because I need an expert badly.
Ok so here is the start of the story.
Purchased this machine 7 years ago 2100 eng hrs.
Only info I got from the previous owner about the engine was that Cummins mid Canada was out to turn the power rating up on this thing.
Since I bought it it never really started the best at cold temperatures.
Kind of like a miss but not really.
Definitely temp related, the colder it is the worse it starts.
Sometimes get a check engine light and it dies and other times not.
This occurs near freezing temps.
+20 C and up hardly notice it.
It has a hard time levelling out for the first 30 seconds to a minute but once it smooths out and catches everything seems ok.
CEL always cleared itself.
So this fall before harvest I decide to investigate this see why its not starting the best.
First notice the wait to start lamp only comes on for 3 seconds regardless of the ambient temp.
Start testing with a test light see if I have power to the large grid heater cables at the top of the engine.
None.
So I unplug the ECM plug that has 2 activation wires for the heavy preheat relays and jumper the relay to battery and the relays click, big fuses are good.
Seems no signal coming from ECM.
So test the intake temp sender with an ohmmeter and it seems to be in the correct range per the temp chart and it does seem to vary in resistance so I assume its good.
So now I run the machine myself last day of harvest.
Typical poor starting -4C CEL light on then off then it levels out finally CEL off and away we go.
Fully up to temp I notice High idle rpms are varying about 50rpm even with no load and it seems to have a lack power, so now what?
Did this about 3 times in an hour, no CEL.
Ran ok the 10 mile road trip home.
So what is the next step?
Back to the truck shop for more diagnostics?
Or just yank the ECM and get mine send it away and checked?
Or Yank the injection pump?
No one here I tried in Canada can run that pump on a test stand that I know of.
I'm thinking buy a rough 8680 just for the mechanical engine and transplant.
In one post, tell me what problems and codes you have seen.
Chris
Is he not seeing where you're commenting?I will try to help you, but you are all over the dang place. Calm down, and tell me what problem you have today.
Chris
OK I'm calm.I will try to help you, but you are all over the dang place. Calm down, and tell me what problem you have today.
Chris
I guess my main concern now is why do I have a varying rpm at wot situation with a lack of power that I experienced in the last work that machine is going to do this year.
No that was the original pump run with a pigtail temporary testing wire the truck shop made for me.Is that after you changed the lift pump that melted the wires?
Yep I know about the strainer/ fuel filter service was last done about 400hrs ago.Have you cleaned the inline fuel strainer and changed fuel filters? With Lift pump codes, Those would be the first things I'd do.
Do you know about the strainer?
Chris