300Tdi Giving me Grief - Defender Source
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Old June 13th, 2008, 05:31 PM
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300Tdi Giving me Grief

My 110 seems to have developed a bit of a problem. Newly installed 300Tdi has been fine for the last 1500 km or so. Two days ago traveling along the highway at about 65 mph, if I pressed down on the accelerator peddle, I noticed what seemed like some one was taking little stabs at the brake peddle. The truck slowed for just half a second then carried on. It would happen every four or five seconds as long as I was trying to accelerate. It was windy and I thought at first I was hitting little gusts of wind, that were slowing me down. But it was only happening if I tried to accelerate. Maintaining a steady speed at or below 60 mph was fine. I didn't notice any real change in engine note as this was happening.

Fast forward to today and it is still doing the same thing. But towards the end of my journey on the highway, the truck would not accelerate at times from 60 mph. Then it would. Off the highway and near home, it started to act up in the lower gears at slower speeds, but seemed to miss a bit as I tried to accel after shifting up.

Any ideas what I should be looking at???? I'm thinking maybe a fuel problem? I installed a brand new fuel pump when the engine went in though. Of course it wasn't genuine so I suppose the quality could be suspect. Not familiar enough yet with this engine (or diesels) to think what could be ailing it.

Any thoughts most welcome.
Brett
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  #2  
Old June 13th, 2008, 05:34 PM
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check the lift pump and the fuel filters first
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Old June 13th, 2008, 06:03 PM
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fuel filter, when you change them add a splash of ATF when you reprime the pump.
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Old June 13th, 2008, 06:30 PM
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Brett
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New fuel filter too at the time the engine went in. The truck was running well right up till the engine swap so the filter shouldn't be stuffed up with crud. New fuel lines at the same time. But, they are cheap enough, so no harm in swapping it out. Of course, no where local to get a filter.

What would the splash of ATF do? Lubrication?

Brett
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Old June 14th, 2008, 09:27 AM
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Better drop the fuel tank and see what is going on. Look for it sucking air from somewhere in the fuel system as well.
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Old June 14th, 2008, 05:13 PM
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Well, I took apart the sedimentor at the back beside the fuel tank. Nice layer of crud on the bottom. Found a loose hose clamp on the fuel line going into the pump. Nothing leaking out but may have been loose enough to draw some air in. Checked the priming lever on the fuel pump. It had resistance, so hopefully it is sound. The turbo hoses appear fine inside and out.

Took the truck for a run on the highway and flogged it up to 75 mph. Backed it down to 60 a couple time and accelerated again and all seems well now with the truck pulling well and no reappearance of the earlier symptoms, so I must have hit on something.

Thanks for the suggestion.
Brett
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