2000 ud 1200 4.617l power questions

Other Nissan diesel engines and vehicles: TD/RD/YD/FD/UD etc.

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superwitt
Posts: 3
Joined: 5 years ago

2000 ud 1200 4.617l power questions

#1

Post by superwitt » 5 years ago

I just bought a ud 1200. It seems to lack power. It struggles to hold 55mph up hills on the highway empty. It is a manual with a 5 speed. Is it normal for these motors to be so lacking in horsepower? What should I start with looking at? The air filter is clean. The rubber tube leading to the turbo, from the air cleaner, seems a bit squishy. The only line that seems questionable is a little rubber line from the front of the turbo that leads to a diaphragm valve of some sort. Its old and dry rotted. Is there way to safely turn the power up on these things? I pulled the exhaust off from the exhaust brake thinking i could give it a little more ease at breathing. That seemed to help.

details:
XNDXHO4.6FAB
FD46TA-U2
4.617l
6 cylinder diesel
Nissan UD 1200 with a flatbed

plenzen
Posts: 867
Joined: 12 years ago
Location: Cochrane Alberta Canada

Re: 2000 ud 1200 4.617l power questions

#2

Post by plenzen » 5 years ago

You say the line from the air cleaner to the turbo is a bit "squishy". Is there a chance this is flattening out under load and restricting the air from entering the turbo ?
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
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superwitt
Posts: 3
Joined: 5 years ago

Re: 2000 ud 1200 4.617l power questions

#3

Post by superwitt » 5 years ago

Took it to a shop and the boost was low. They cleaned and adjusted the turbo. Runs as good as it will get. Better fuel mileage and a noticeable difference in power. They informed me there is not a lot you can do with this engine.

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