Diesel engine revs up and down

BAL · Jun 7, 2020

I have a 275 International Tractor. Diesel. If you give it a bit of throttle, it will rev way up. Have to keep playing with the throttle. Any suggestions what the problem is.

tomNE · Jun 7, 2020

fuel filter is where i would start!

Billy Shafer · Jun 7, 2020

Some ideas I can think of.
Injector pump needs work.
Fuel filters need changing.
Return line stopped up.
Control linkage worn out.
Bad fuel.
Bad fuel pump.
Bad operator. I have seen that before.

JDEM · Jun 7, 2020

A British B275? If so, an early one with the CAV in-line injection pump and the air governor?

MJ in the UK · Jun 7, 2020

Yess I agree with that, it is a worn diaphram in the housing on the back side of the pump. MJ

JDEM · Jun 7, 2020

I also had to fix one once that had a wasp nest built in the air-intake pipe. The nest was stopping the air-valve-shutter from moving (that works with the governor).

Later B275s have the rotary CAV pump with the internal centrifugal governor.

showcrop · Jun 7, 2020

When mu old Fords have done that they were running out of fuel or had a partial blockage restricting fuel flow. I try to do easy things like filters and lines before going deeper.

paul · Jun 7, 2020

Probably needs the injector pump rebuilt but I’d sure start with a new filter and hope that’s all it is.

Paul

Diesel engine revs up and down

BAL

New User

tomNE

Member

Billy Shafer

Well-known Member

JDEM

Well-known Member

MJ in the UK

Member

JDEM

Well-known Member

showcrop

Well-known Member

paul

Well-known Member

Similar threads