mariner45
Full Access Member
Hi guys,
I am experiencing intermittent problems with the injection pump on my truck engine. It will cut out - governor I think, without warning and when this happens I get the loss of engine power - clouds of grey/blue smoke billowing out of the exhaust. Then the governor resets, the smoke clears up and I have power again.
It most often happens when climbing steep hills and the engine is working hard. I don't have a tach, so I don't know exactly why it does it. I suspect that going up a steep hill, I will move the throttle a little and this causes a momentary change in the engine load and allows the engine to tend to overspeed and trip the the governor.
But, I don't think the engine is overspeeding, but rather the governor is toooo sensitive to load changes. Maybe a worn spring or even the wrong spring was installed when the fuel pump was rebuilt about ten years ago. The pump did not trip when it was first installed and now that it does, it seems to be more frequent than before.
The engine runs great with no smoke at all when under steady load. Smokes a little at start up when cold. No blowby from oil filling neck on engine front.
Other than the intermittent cut outs and 50 - 55 mph maybe, the engine responds readily to the throttle.
I am 99% sure that it is not a transmission problem - slipping etc. My own suspicion is that the wrong governor spring was installed or the spring is tired and behaves erratically.
I do have a spare UHaul pump to put on, but I would like to know what is going on with the fuel pump on the engine.
Any help you guys could send this way would be greatly appreciated. Mel - are you around ?????
Thanks in advance
mariner.
I am experiencing intermittent problems with the injection pump on my truck engine. It will cut out - governor I think, without warning and when this happens I get the loss of engine power - clouds of grey/blue smoke billowing out of the exhaust. Then the governor resets, the smoke clears up and I have power again.
It most often happens when climbing steep hills and the engine is working hard. I don't have a tach, so I don't know exactly why it does it. I suspect that going up a steep hill, I will move the throttle a little and this causes a momentary change in the engine load and allows the engine to tend to overspeed and trip the the governor.
But, I don't think the engine is overspeeding, but rather the governor is toooo sensitive to load changes. Maybe a worn spring or even the wrong spring was installed when the fuel pump was rebuilt about ten years ago. The pump did not trip when it was first installed and now that it does, it seems to be more frequent than before.
The engine runs great with no smoke at all when under steady load. Smokes a little at start up when cold. No blowby from oil filling neck on engine front.
Other than the intermittent cut outs and 50 - 55 mph maybe, the engine responds readily to the throttle.
I am 99% sure that it is not a transmission problem - slipping etc. My own suspicion is that the wrong governor spring was installed or the spring is tired and behaves erratically.
I do have a spare UHaul pump to put on, but I would like to know what is going on with the fuel pump on the engine.
Any help you guys could send this way would be greatly appreciated. Mel - are you around ?????
Thanks in advance
mariner.