Mitsubishi tperkins' 1999 Mitsubishi Pajero

Discussion in 'Members Rides' started by tperkins, Aug 21, 2018.

  1. tperkins

    tperkins Devout AYC Disciple

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    Did some more maintenance.

    Finally got around to tackling the spark plugs, I had read that the intake manifold would need to be removed in order to do the right bank, but on the GDI turns out just the throttle body needed to be removed. When I got the truck I ordered spark plugs before it showed up, then when it got there I realized I needed a throttle body gasket, just looking at it as the throttle body would for sure have to come off. So I ordered that, when that came in I looked at a how-to and people were talking about removing the intake manifold, so I ordered the plenum gaskets, when those came in, I finally got around to tackling it... over a year later. The truck still had the factory spark plugs, which at this point are 21 years old and had 119,000 km (FSM wants them replaced every 80,000km).

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    I am likely going to block those EGR valves and see what it does. Being old, and GDI, the throttle body was pretty clean, but the back side of the throttle plate and inside the intake manifold had some carbon build up. I have been using a can of sea-foam top end cleaner at every second oil change, and that has made some impacts you can see, but at this point I might try and get set up to do walnut blasting and take the intake manifold off in the summer, and inspect and blast the valves.

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    Old plugs, they have had a pretty tough last few months of winter. Where I have been working it has been basically consistently -30 or below. It doesn't love to start in that with just the oil pan heater, and when I left it unplugged one time it would not start when it was -36, and I really flooded the shit out of it and killed the battery lol. It really had a tough time starting and running following that, the idle surging was crazy and I may have triggered an idle relearn in -36 with a flooded truck. I am hoping this has to do with the amount of soot on the plugs, or maybe that is just how a GDI plug looks after 119,000km and 21 years. The back two plugs on both sides of the engine were pretty scary to remove. They spun out 1/4 turn and bound up, both of them. I sprayed the shit out of them with penetrating lubricant, left if a few minutes, and worked the plugs back and forth until they were smooth as eggs, but it was still nerve racking.

    The spark plug tubes are very skinny, I will likely order a smaller spark plug socket, but for now I had to make due. The intake manifold wasn't installed true, so there is a small offset on the top side between the spark plug tubes and the intake manifold (where the coil packs mount). I had to grind down this socket to snake it through that, which worked and saved me from removing the intake manifold.
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    Next job was the microfilter on the high pressure fuel pump. What a pain. It was on the back of the engine, and it isn't even listed in service manuals as existing, but some guys have worked it out that this is a potential cause for issues on the GDI engines.
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    Where flash light is pointing, exists this:
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    It is about 6" down the back side of the engine, you have to crawl all over the truck to get to it, and I dented the top of my radiator with my knee during this process. You need to remove those two little bolts (10 mm with the Phillips head) and pull out the fuel line, then take a screw, screw it into the existing filter, and remove that. Followed by tapping the new filter in. This is all happening in a space with next to no room, where anything you drop falls into the abyss. Luckily I ordered two microfilters, and I dropped the first one and couldn't find it anywhere.

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    This little jasper.
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    Also replaced these bits. For whatever reason, missing all that on the fuse box is very common.
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    I also replaced these rusty fasteners on the windshield cowl, they just looked so out of place.
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    I don't know if it was the plugs, or microfilter, or cleaning the throttle body but it seems to idle a whole lot smoother now.
     
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  2. Rygar

    Rygar That's what she said.

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    Lookin' good Trabs. How's the AYC in this rig?
     
  3. tperkins

    tperkins Devout AYC Disciple

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    Haven't gotten around to installing that option yet, but I will tell you the ABS is terrible. Maybe the worst ABS system I have ever had on a vehicle lol.
     
  4. Rygar

    Rygar That's what she said.

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    Pull the fuse, old school brakes.
     
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  5. tperkins

    tperkins Devout AYC Disciple

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    Started yesterday -41 (-50 windchill). Let it run for 20 minutes before driving it, was barely blowing hot air, I would call it warm. Took it for a decent long drive just to get everything up to operating temps as best as I could.

    Would not start today (-38). Well, rather, would not continue running today is a better way to say it lol. Started right up, maybe took 3-4 seconds, then died. Started it again, it died. Tried starting a 3rd time and it just burbles and fires and wont actually catch.

    Fun stuff.
     
  6. IanB

    IanB New Member

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    -41C before the wind is a special kind of cold a lot of people never get to experience, it's hard on things.
     
  7. Greg

    Greg Local Grumpy Moderator

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    Ship it my way, I'll give it a good home...
     
  8. tperkins

    tperkins Devout AYC Disciple

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    Finally got it to garage, pulled plugs, cleaned them, re-installed them, changed the fuel filled oil, fired right up. Peep the fuel that came out of the exhaust.

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    I might have tried turning it over after it was already flooded a bit too much.
     
  9. tperkins

    tperkins Devout AYC Disciple

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    I've also ordered stock, multi-ground plugs after consulting with some peeps and finding this NGK video:



    Unsure if this had anything to do with my issue, pretty sure it was just that it was -41, -52 with the wind and probably in that amount of wind and cold my little 250w oil pan heater didn't have much of a shot at warming up the engine... but I was surprised at the amount of carbon fouling on my fresh iridium single ground plugs. When we ordered these, the stock plugs are out of production and they were marked as a replacement (on Amayama, Partsouq) etc, now my thinking is that Mitsubishi used a multi ground plug for a reason (I didn't know they were multi-ground until we removed them) and that it won't hurt to replace them... especially on my 3rd go at them I can probably finish swapping the plugs in under an hour.Read: carbon fouling.





    "The gasoline direct injection version of the 6G74 was launched in April 1997 as the first GDI V6 engine ever produced. It differed from the basic 6G74 in many ways apart from its unique fuel injection system — it had a crown-curved rather than flat piston head, upright intake ports rather than angled, and a 10.4:1 rather than 10.0:1 compression ratio. Mitsubishi claimed 30 percent better fuel economy, a 30 percent reduction in emissions, and higher power outputs than diesels.[4]"

    That crown curved piston is there to swirl the air / fuel charge and make it more homogeneous mixture... in my stupid head maybe this swirling mixture has more likelihood of fueling the spark plugs on those extreme cold starts and single ground strap might further that vulnerability.. but likely it makes no difference. Problem being fuel hitting metal that is -38 and not wanting to then atomize, also in my stupid head after @pitty tried to explain to my gorilla brain. Fuel still goes in with air then gets compressed in a multi port injection engine so really, probably makes no difference.

    Mostly, this will be a make work job that might make me feel a little more confident, coupled with the coolant heater, in cold start abilities. That said, it started in those temps probably 19/20 times this winter.
     
  10. tperkins

    tperkins Devout AYC Disciple

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    Weighed the racetank/fatjero.

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    You know, suddenly 11-13L/100 km out of a 21 year old truck shaped like a shoebox with bulgy fenders that is lugging around 5100 lbs is a little more impressive.

    This was with me in it (215lbs), my winter emergency bag (variety of fluids, road flares, receiver, tow rope, winter clothes, etc [approximately 70 lbs]), and my tool kit I keep in the truck (just like a 246 piece stanley and my tool pouch with my hand tools from my electrical days[approximately 60 lbs of tools]). Full tank of fuel as well (97 L tank).
     
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  11. RyanV

    RyanV Member

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    I was going to say I'm surprised it would weigh in that much, but you do have quite a bit of extra weight in it. My Land Cruiser weighed in at 5120 lbs with myself (180 lbs) and half a tank of fuel (~45l) and pretty much nothing else in it at the time.
     
  12. tperkins

    tperkins Devout AYC Disciple

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    I knew it weighed more than the Tacoma / Hilux, and looking at it, easy to see where the weight went. The metal in the fully boxed frame seems like 40% thicker than my tacoma, bigger axles, diffs (9.5" ring gear in rear vs 7.5"), driveshafts, blah blah. But damn!
     
  13. tperkins

    tperkins Devout AYC Disciple

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    [​IMG]

    When I went to install I noticed what I should have clued into before even ordering, that the thermostat is actually on the lower rad on Fatjero:
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    So, I asked a couple bros what they would do. I also noticed that after driving for 20 minutes, and then parking it in garage to do the actual work that the upper hose was hot (which makes sense). I googled, not much came up for Pajero, but found a lot of Land Cruiser guys discussing the same issue, that the thermostat is on the lower hose but it still "seems" to work. Reports that it never fully seals and blah blah. When installing the new thermostat previously, I did notice on the new ones there a couple little holes that never fully close. Looked at parts schematics where things go..

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    Anyways, what did I do? Decided I should just take it to a shop and have a block heater put in while I am away for work. For now, I installed it in the upper rad hose. Not sure if that was the right move or not. Seems to make sense to me.

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  14. tperkins

    tperkins Devout AYC Disciple

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    [​IMG]


    Well that was a big ol failure, warms that pipe, warms the radiator, warms the engine. Also warms the coolant temperature sensor and the truck doesn't know how to start. Now I really just need to install a block heater.
     
  15. tperkins

    tperkins Devout AYC Disciple

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    [​IMG]
    Out fissin'


    Off topic, can someone in BC please buy this?
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    I was so close to buying it, but I don't think it would pass an OOP in its current condition. It is a 1999 Mitsubishi Pajero Jr. Lynx and the dude wants 2000$ for it. It is rough, it was been his bush rig... but also look at it. It is so awesome!
     
  16. Dah_Hunter

    Dah_Hunter Looking over your shoulder, so you dont have to.

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    Where is that thing posted?
     
  17. tperkins

    tperkins Devout AYC Disciple

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    Found it on facebook, I will pm you the details as the ad is lost in the facebook abyss. It is pretty close to @Greg who was going to go look at it and babysit it for me.
     
  18. tperkins

    tperkins Devout AYC Disciple

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    Made into art by @WAGOWN on WSC. He was just asking if anyone wanted digital drawings of their cars for him to pass the time.

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  19. IanB

    IanB New Member

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    That's very cool!
     
  20. tperkins

    tperkins Devout AYC Disciple

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    [​IMG]

    Forgot how good the summer wheel / tire combo looks.

    Beside the evo 3 wheel.
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