John Deere 445 running rough

[nfhi1994]

I Have a John Deere 445 that is running rough. Governor, spark plugs, map sensor have all been replaced and tractor still runs rough. Tractor runs better with hose off of map sensor.

 

[beenthere]

:welcome: to TBN

Looks to be a s/n break at 70000. Are you above or under that?

History of fuel, and fuel filters.. or what may have happened when the trouble started.

Reasons for replacing those items you mentioned, may help.

 

[nfhi1994]

Above that serial number break.
Tractor was brought to me in pieces. I put it back together and returned back to customer. it ran for two days no issues started acting up was able to make it run smooth by holding governor linkage. Thought that governor needed replaced due to that. ( I did adjust governor via tech manual first, nothing changed) i did change the fuel filter, nothing changed. If I pull the hose off of the map sensor it would start to run better. That痴 why I replaced the sensor, no change.

 

[Richard001]

Was the engine disassembled when it came to you?

Any reason given by the customer as to why he/she disassembled the tractor?

 

[radios1]

try disconnecting the battery for 10 minutes, then retry, that should reset the computer..

 

[nfhi1994]

Was the engine disassembled when it came to you?

Any reason given by the customer as to why he/she disassembled the tractor?

Yes the engine was dissasembled. Customer had someone else work on it first. They tore it apart and for what ever reason gave up on it and returned it in pieces.
Customer had new piston rings put in due to engine smoking. That痴 why the engine was disassembled

 

[nfhi1994]

I tried that and nothing changed still runs rough

 

[nfhi1994]

Yes I have it did not change anything. if I remove the hose from the map sensor it would run better if I plug the hose back in to the map sensor it would start running rough again.

 

[nfhi1994]

When running it spits and sputters and keeps dying

 

[nfhi1994]

I disconnected the battery for 10 minutes. Nothing changed it still runs the same