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  1. #1
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    Default Isuzu KB 280 DT 4x4

    Model: KB 280 DT LX DC 4x
    Year: 2000
    Mileage: 328000
    Problem: Difficulty starting. Once warmed up no problem anymore as if not enough diesel coming through/no power. Where should I start: glow plugs or injectors
    Cause of problem(if known): unknown
    Specifics of repair work carried out: not yet started
    Cost of repair:
    Who did the repair:
    Vehicle under warranty, Y/N: No
    Was damage covered by warranty: No


  2. #2
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    Default Re: Isuzu KB 280 DT 4x4

    I'm not familiar with the Isuzu setup but I would start with the glow plugs since its a lot less work and a lot easier to test them for resistance.
    Current - 2009 Mazda BT50 3.0CRDi 4x4 d/c
    Previous - 2005 Ranger 2.5 tdi 4x2 d/c (277 422km)

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  4. #3
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    Default Re: Isuzu KB 280 DT 4x4

    I'd start with the glowplugs and check them out.

    Also check the primer pump that it actually stays primed. Check your fuel lines for small cracks. I've had a small crack in the return line by the firewall that caused similar issues.
    André
    1998 Isuzu Frontier 280DT 4x4
    2014 Jurgens XT140

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  6. #4
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    Default Re: Isuzu KB 280 DT 4x4

    Glowplugs could be a possibility, but remember, they only come into play when the engine coolant temperature is below something like 6 degrees celsius, in which case the glowplug light will remain on for a while before you can start it. But never underestimate the difference that a new battery can make. I had to replace the Frontier's battery a few months ago, and with the faster cranking speed, it has no trouble starting on the first swing.

    I've had the Frontier since 2006, and I've never replaced the glowplugs, I would not be surprised if all of them are dead by now, but even in cold weather, when I actually have to wait for the glowplug light to switch off, it starts very quickly.

    It has almost 400 000 kms on it.

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  8. #5
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    Default Re: Isuzu KB 280 DT 4x4

    I have never waited for the glow plugs, 1999 280TD, 305k km so far. Still a youngster.

    As matter of fact, they are disconnected.

    Recently also have difficulty starting first thing on cold mornings. After first start, no issue.

    Two things popped to mind for my issue, maybe related to yours?
    1) I know the battery is nearing EOL. When Suzy is parked for day or so, I connect a charger to the batt. That helps.
    2) WÜRTH Diesel/Injector cleaner ... it is time for another can.

    Cpt Isuzu specialists, one asks them to check injectors please, they always ask:
    Have you ran a can or two on WÜRTH through the engine?
    Yes, ok, lets book it in.
    No, then go and do that, call us if there is still an issue.

    So methinks, start there, charge the battery overnight, see if it is better.
    And run a can or two of WÜRTH Diesel Cure through the engine.

    Result:
    Once a year I do the WÜRTH thing, always improvement on km/l. Last tank was 10.57 km/l city and some open road driving. I drive like an "angel" (sometimes).
    And the power is right back too.

    If I don't do that I can eventually hit like 8-9km/l over time, and I struggle on hot days to get the oempf.
    Political Correctness
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  9. #6
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    Default Re: Isuzu KB 280 DT 4x4

    First thing to do, replace the pipe from the tank to the primer pump/water trap with a single pipe. If it still starts badly after that, do the other stuff.

    This is a known issue, but very easy and cheap to fix.

    After that I would remove the starter, take the back off and clean the commutator. Also an easy DIY job.

    Disconnect battery first, or else you will blow the 60A fuse.
    Last edited by ZuluCowboy; 2024/05/14 at 11:37 AM.
    Isuzu KB300 d-Teq with high range, low range and long range.
    Isuzu KB280DT wif a front diff.
    Mercedes W123 300D has been sold.
    Bio Fuel and WVO on hold for now.

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  11. #7
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    Default Re: Isuzu KB 280 DT 4x4

    A 280DT Isuzu doesn not need glowplugs to start unless it is well below freezing point. My guess (from experience) is air getting into the fuel system somewhere. I suggest you start with Zulu's point and take it from there. A common culprit is also the diesel filter housing.
    There is never a right time to do the wrong thing and never a wrong time to do the right thing!

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  13. #8
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    Default Re: Isuzu KB 280 DT 4x4

    Taking notes of all the points suggested here to check.

    Car will be booked in to action all these points.
    Getting tired of the white smoke cloud when starting first thing in the morning, especially after standing for a night, or a few days.
    Once started, restarting rest of the day harly a whiff.

    Even Kanniedood cars need TLC maintenance at times.
    Political Correctness
    Political Correctness is a doctrine, fostered by a delusional illogical minority, rabidly promoted by a unscrupulous mainstream media which holds forth the proposition that it is entirely possible to pick up a turd ... by the clean end!

    Saw this in a pub - no idea why the wife does not see it so:
    I'm not opinionated ... I'm just always right!

  14. #9
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    Default Re: Isuzu KB 280 DT 4x4

    I had the same issue years ago. Turned out to be the pump after I had exhausted all other avenues. Wasn't particularly expensive to get refurbished at Bosch.

  15. #10
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    Default Re: Isuzu KB 280 DT 4x4

    Quote Originally Posted by the_terrible_triplett View Post
    Getting tired of the white smoke cloud when starting first thing in the morning, especially after standing for a night, or a few days.

    White smoke normally indicates air in the system.
    Let them check all fuel lines, the hand primer/water trap and in your bakkie still has one, the diesel heater.
    Jaco

    Isuzu KB300 DMax D/C 4x4 3" Homemade lift, Bosvark LFR Radio and free-wheel hubs.

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    Default Re: Isuzu KB 280 DT 4x4

    Remove the priming pump and filter. Check inside the prime pump is a reed valve, that sometimes gets the tiniest of dirt inside and then it does not seal and prevent fuel to drain back to tank. (Be careful very fragile) From underneath check on the LH side of the injector pump is an inspection plate with 2x 10mm bolts. Sometimes that leaks and allows air to enter.. The fuel delivery pipe connection on the injector pump has a little sieve that sometimes gets blocked.

    With a multi tester get someone to switch the ignition on and check if there is 12v to the glow plugs. If not, it could be a relay, fuse or the temp sensor issue. The temp sensor is situated next to the thermostat. Any diesel sweat on any of the connections or diesel pipes will be an indication of a possible air leakage into the system.

    Hope this helps.
    Pieter Kemp.
    2011 Isuzu 300d-teq 4x4 d/c
    Artisan built Blapsie caravan.
    The decision you make today, will determine the road you walk tomorrow

  17. #12
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    Default Re: Isuzu KB 280 DT 4x4

    Quote Originally Posted by Pemul View Post
    Model: KB 280 DT LX DC 4x
    Year: 2000
    Mileage: 328000
    Problem: Difficulty starting. Once warmed up no problem anymore as if not enough diesel coming through/no power. Where should I start: glow plugs or injectors
    Cause of problem(if known): unknown
    Specifics of repair work carried out: not yet started
    Cost of repair:
    Who did the repair:
    Vehicle under warranty, Y/N: No
    Was damage covered by warranty: No

    I had this issue with my ex Ford Courier - turned out to be a leak in the water trap on the second aftermarket diesel filter. Replaced that and problem sorted. It was taking in air and caused the car to die. Also big plumes of white smoke constantly
    Current:
    Still looking for a 4x4 replacement
    2022 Suzuki Vitara Brezza GLX Manual a.k.a "Zook"

    Ex:
    2004 Hardbody ZD30 4x4 Double Cab a.k.a "Hendrik Hardbody" (Sold)
    2005 Wrangler TJ Sahara a.k.a "Teej" (Sold)
    1999 Ford Courier 2.5TD 4x4 a.k.a "Ben" (Sold)

  18. #13
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    Default Re: Isuzu KB 280 DT 4x4

    Quote Originally Posted by the_terrible_triplett View Post
    ....Once a year I do the WÜRTH thing, always improvement on km/l. Last tank was 10.57 km/l city and some open road driving. I drive like an "angel" (sometimes).
    And the power is right back too.

    If I don't do that I can eventually hit like 8-9km/l over time, and I struggle on hot days to get the oempf.
    WÜRTH Diesel Cure - magical stuff.

    Sorted my KB 280 DT out (difficult cold start, lots of white smoke upon start-up - all gone after 1 can).
    Eggie.

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