LD28 fuel delivery issues

Discuss (and cuss) the Nissan LD-series OHC Six diesel engine, popularly available in the US in 1981-83 Datsun/Nissan Maxima Sedans & Wagons.

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JasperG
Posts: 95
Joined: 11 years ago
Location: Bradenton, FL

LD28 fuel delivery issues

#1

Post by JasperG » 9 years ago

Hey Gang back again. I am having trouble with my engine again. Pretty sure its fuel delivery. I recently rebuilt and replaced my injectors, got a tach and time and set my timing and my truck (land rover) was running great. I took it offroad two weekends ago and it did great, until I went up a steep incline and then back down...it immediately started smoking white smoke, wouldnt idle and basically ran like it was not getting fuel. I dont see any restrictions in the fuel line and the return line is pushing diesel. I pulled two lines, one was spitting diesel pretty good, the other not as much but still some fuel coming out. Hoping I didnt do anything to hurt my IP. It usually starts right up with no gas pedal. Now it takes forever to start and you really gotta pump that gas. Any pointers in the right direction would be appreciated. I have a friend coming over on Thur to help me out (turn the truck over etc, hes no expert). Oh and one more thing. It had been missing a tiny bit at start up but it cleared right up once it ran a few seconds...

Thanks Gordo

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exmod110
Posts: 34
Joined: 14 years ago
Location: Manitoba

#2

Post by exmod110 » 9 years ago

Double check the timing belt has not jumped a tooth.
85 Landrover 110 300tdi
02 Mazda protege5

JasperG
Posts: 95
Joined: 11 years ago
Location: Bradenton, FL

#3

Post by JasperG » 9 years ago

exmod110 wrote:Double check the timing belt has not jumped a tooth.
I was thinking that. I broke out my tach and time yesterday to check it but I cant keep the thing running unless I stay on the gas...I will get a buddy over to help check that, or pull the pulley/cover/etc and check it...keep em coming.

rlaggren
Posts: 541
Joined: 13 years ago
Location: San Francisco

#4

Post by rlaggren » 9 years ago

> white smoke...

Coolant? What was the lead-in to the problem? Get hot any?


Rufus
82 Maxima wagon

plenzen
Posts: 868
Joined: 13 years ago
Location: Cochrane Alberta Canada

#5

Post by plenzen » 9 years ago

check the pick up in the fuel tank that something did not fall off or get clogged over the screen or what ever may be in the tank.
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN

JasperG
Posts: 95
Joined: 11 years ago
Location: Bradenton, FL

#6

Post by JasperG » 8 years ago

ok I figured it out.Tach and Time wouldnt read the timing so I knew it was WAY off as it goes to 50 degrees only. So I pulled the cover and the belt jumped four teeth. As it turns out inside the housing where the IP belt is was full of hard packed mud. When I went up or down the hill some of that hard packed mud must have went between the belt and the gears causing the belt to slip over the pulley. I put it back to 20 cogs and it is running great. The belt was new and a tad loose so it must have stretched a bit. Since I had help, I pushed up hard on the tensioner while my buddy tightened the allen bolts down. It seems to be a bit tighter now so hopefully that will help matters. Thanks for the advice. Gordo

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