LD28 cutting out. HELP

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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72fj40
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Location:christchurch New Zealand
LD28 cutting out. HELP

#1

Post by 72fj40 » 7 years ago

hi guys i have a toyota fj40 landcruiser with a nissan ld28 engine conversion it been running great until recently. it runs fine at low revs but cuts out and splutters from mid to high revs so bad that i cant even reach the speed limit it also now puffs a little white smoke. any ideas?

Carimbo
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#2

Post by Carimbo » 7 years ago

Have you replaced the fuel filter?

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asavage
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#3

Post by asavage » 7 years ago

If the "cutting out" is sharp and pronounced, that may be air getting into the fuel pickup or the fuel line from tank to the injection pump, or a failing injection pump. I'd be looking for air first -- use a short section of clear vinyl tubing temporarily plumbed to the inlet of the IP and run it, watch for bubbles. Air in fuel will give you the white smoke, too.

If it's more of a surging and lack of power, fuel restriction is the most likely cause, like Carimbo said: change the fuel filter first. You may have gotten a bad batch of fuel.

And, it goes without saying, that most problems with diesels running bad are due to fuel quality or filter problems.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

72fj40
Posts:6
Joined:7 years ago
Location:christchurch New Zealand

#4

Post by 72fj40 » 7 years ago

thanks guys i replaced the fuel filter i had a bit of sludge build up in it. prob now is i cant start it whats the correct bleeding procedure

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asavage
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#5

Post by asavage » 7 years ago

Does your fuel filter's head have the original Nissan integrated fuel priming pump? The original vehicle from which the LD28 was removed had one.

Excerpt from bleeding procedure is in this post. Click on the picture in that post for the whole page of stuff from the manual on bleeding the fuel filter after changing it.

Image

There's also a thread with some info (not much) here.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

72fj40
Posts:6
Joined:7 years ago
Location:christchurch New Zealand

#6

Post by 72fj40 » 7 years ago

hi no my filter and primer look far older and dosent have a bleed screw. it definitely air in the system im just having probs getting it out

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asavage
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#7

Post by asavage » 7 years ago

If your filter head is not the Nissan one, it's hard to give you good advice on how to bleed the system. Some people use a hand-operated vacuum pump on the injector pump's return line to pull fuel through the filter and pump.

Filter heads that do not have a built-in primer pump are generally used on engines whose injection pump has a primer pump on one side, such as the Nissan SD series.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

72fj40
Posts:6
Joined:7 years ago
Location:christchurch New Zealand

#8

Post by 72fj40 » 7 years ago

hi guys just a update i traced the prob down to the manual primer pump it was sucking in a bit of air i got a new one bleed the system and she fired up

bogs777
Posts:33
Joined:9 years ago

#9

Post by bogs777 » 7 years ago

i had the same problem before. basing it from the manual, my manual pump was not the Nissan one. might have been an Isuzu or Mitsubishi. i also realized it when i bought a VIC fuel filter for my LD28 and it wouldnt fit. brought my current filter to the autosupply and was advised that it for an Isuzu or Mitsubishi. Priming pump works well but i have to purge air from it like every 3 months
C32 Laurel, LD28, Black/White, 330k

http://www.gofundme.com/7artao

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