2LT injector pump internal timing?

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double diffa
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Unread post by double diffa » November 8th, 2007, 10:45 am

When I worked at a 4x4 wreckers, they used to do repairs as well, they had a device similar to an electric timing light for petrol cars, that senced the pulse going through the injector line, do these work ok?
I thought I might be able to fit my pump up 1 tooth advanced, and fine tune with the light?
When I bought the 2LT pump and fitted it up the first time, the wrecker I got it from said he had it on his mates car, and it went fine.
But the reason I removed it and got it caliberated was the lack of power, and it was belching black smoke.
When they set it up at the diesel shop they said it had been over fueling by 147%, and it was still gutless?
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Turbotojo
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Unread post by Turbotojo » November 8th, 2007, 11:26 am

You cant set timing by checking the fuel pulse in the lines. There might be something wrong with the pump internally and you won't find out till it gets pulled apart. To set the timing correctly you need a plunger stroke measuring tool and dial indiacator. The diffrences between the different L series motors in the timing is only 0.2-0.4mm of plunger stroke. In terms of optimal fuel delivery that difference means a lot.
Get another 2L-T pump and try that. The pullies should all be the same. And changing the timing by going up one notch on the belt won't work as it does in Petrol motors as the injection timing is set on or in the pump itself. One notch on the belt would be about 5mm which is way too much for something with much smaller tolerences of under 1mm. You couldn't turn the pump far enough to make up for that.
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Turbotojo
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Unread post by Turbotojo » November 8th, 2007, 11:52 am

You might want to buy this,TOYOTA L 2L 2L-T FACTORY ENGINE MANUAL - eBay Toyota, Manufacturer Manuals, Car Manuals, Cars, Bikes, Boats. (end time 09-Nov-07 11:08:08 AEDST)

I have the 1983 L,2L book from Toyota and there is a large section on the injector pump and how to set it and so on. If you are going to stick with the old pumps then I would buy it. It explains a lot of what you need to know.
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double diffa
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Unread post by double diffa » November 8th, 2007, 11:57 am

Ok, sounds like I need to throw the pump out and keep the HAC, I was going to keep it as a spare, but it sounds like the wrecker stooged me, same as the one who sold me the motor.
Do you know how much work is involved in fitting the HAC to my 2L pump?, and is it worth it, as I can only see it effecting the fuel, below boost, as they are both the same at full throttle.
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Unread post by Turbotojo » November 8th, 2007, 12:07 pm

I would just leave it as is for now. Go with what works best. Save up some money to buy another car or upgrade to a 3L motor and work on that. Don't throw the pump away it might come in handy later when you discover that the problem was elsewhere. How much did you pay for the motor? As I am looking for a 2L-TE to do up.
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double diffa
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Unread post by double diffa » November 8th, 2007, 1:44 pm

OM617isbest wrote:How much did you pay for the motor? As I am looking for a 2L-TE to do up.
I originaly had a 2L with ARB turbo, but it did a (new) hose and cooked, so I went to a major Brisbane motor importer, to get a 2LT so I could sell my turbo and recoupe some of the outlay.
I said I wanted oil pressure and compression figures before I would except the motor.
After being stuffed around for 2 weeks, they miraculously found one on the rack that they had somehow missed, that had 450 PSI across the range.
I paid $2200 with 3 mths warranty, but it ran like crap from day one.
First it had so much blow by that it spat the half moon out of the cam tunnel.
Long story short, they said pull it out send it back, at my own expence, and they would give me another one.
After the last one, I didn't trust them, so I pulled the head off to have a look, and found number three had both compression rings broken, and had been for so long that there was a lip worn in the bore below the second ring, 450 PSI I don't think so.
Anyway, they said my warranty was void because I pulled the head off.
Sorry about the saga, just want you to beware, and don't get caught by the fine print.
I spent another $3000 doing it up, rebore crank grind valves etc.
And that's the beginning of another saga, the cylinder head shop tried to surface grind the ceramic pre comps.
I'll stop now, or this will go on for pages.
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double diffa
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Unread post by double diffa » November 8th, 2007, 2:04 pm

OM617isbest wrote:I would just leave it as is for now. Go with what works best. Save up some money to buy another car or upgrade to a 3L motor and work on that.
No mate, I'm stoked with the vehicle over all, I was just trying to see if my spare pump would be any good to me should I need to use it.
The old 2LT is surprisingly "towey" since I did it up, my mate has a low KM GQ 2.8 turbo, and I out accellerate him eaisily, allthough the Patrol is a lot fatter, it is a 2.8 litre 6.
So if I understand you correctly, the 2LT pump can be sismanteled, by someone who knows what they are doing, and adjusted internaly to suit the 2LTHE timing specs yes?
If I ever have to get a pump done up this might save me some time and have a better set up in the long run?
I thought H.A.C.stood for high altitude compensator? maybe I should stick to my motorcycles ay :)
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Unread post by trains » November 8th, 2007, 4:08 pm

Hey Double Diffa,

Can you explain exactly how you set the timing up on the 2LT injector pump when the motor was at tdc.

cheers

Trains
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Unread post by Turbotojo » November 8th, 2007, 4:23 pm

That is what a HAC is. Its just a diaphram which adjust the fuel metering. You could do the pump yourself, there is not much in it and the parts are cheap compared to Bosch stuff. I've seen the diagrams and would try it if needed.
Which importer did you use as I emailed afew for prices.
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double diffa
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Unread post by double diffa » November 8th, 2007, 4:48 pm

trains wrote:Hey Double Diffa,

Can you explain exactly how you set the timing up on the 2LT injector pump when the motor was at tdc.

cheers

Trains
Lined up all the timing marks as per their index marks, the same as I did with my 2L pump.
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double diffa
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Unread post by double diffa » November 8th, 2007, 4:57 pm

OM617isbest wrote:That is what a HAC is. Its just a diaphram which adjust the fuel metering. You could do the pump yourself, there is not much in it and the parts are cheap compared to Bosch stuff. I've seen the diagrams and would try it if needed.
Which importer did you use as I emailed afew for prices.
Why then do you think they want $700 plus to put seals in them.
I figured it was a faily time consuming job, which requires specialised equipment, or did you mean swaping the HAC over?
I believe " a little knolledge is a dangerous thing"
I don't know anything about the inside of injector pumps, so my "little knolledge on the subject could get me into trouble I think.
I sent you a p.m. with the name of the company that sold me the dodgy motor, don't want to get sued, the poo*^*rs have got enough of my money :)
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Unread post by dirtygq » November 8th, 2007, 5:01 pm

i have a brand new 2lt-e pump here $350 and a good used (to my knowlege ) one for $150 .These are 2lte's though new one is in toyota wrap and never opened. also have a full 2lt in parts if you need anything.And also a good 3L pump .
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Unread post by Turbotojo » November 8th, 2007, 5:01 pm

That sounds right to me. The 2L-TE is exactly the same as the 3L and 5L except for the conrod bearing journal which is smaller. Everything else is interchangeable including the pumps which just have different fuel metering or plunger strokes.
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Unread post by Turbotojo » November 8th, 2007, 5:07 pm

double diffa wrote:Why then do you think they want $700 plus to put seals in them.
i bought a Denso seal kit for $90 from a shop in Brendale. It had all seals and washer to do the whole thing. I only used 4, 3 o-rings and one top seal. Did the timing belt aswell as I had to take the pump off. Half a days work and only $350.
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Unread post by Turbotojo » November 8th, 2007, 5:12 pm

Its a bit of a niche market with injector pumps and turbos. The parts are cheap and there is not much labour although some of the equipment is expensive. The Diesel and turbo shops have amonopoly on the market so charge accordingly.
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