2.8 hilux injector pump fitted to 1kzte

Iv got a 1kz that had the dreaded electric computer powered injector pump
It's ran with a chuf and occasional shake at idle and generally ran not the best
Iv just fitted with the help of a mate a 2.8 hilux manual pump to get over this issue, with the new pump on it runs better but I can see the issue is still there, anyway it's mid project and I'm really curious to know what the plug on top of the 2.8 injector pump is with the two blue wires?
It's obviously not critical as I'm able to drive the truck but it's doing a couple of funny things that I'm thinking I might be able to remedy if I know what it is,

Some of the odd things
Runs for 3-4 seconds after turning off the key then shuts down
Bit hard to start like there is air getting in the feul line somewhere(did this with the old injector pump too) Will chase this down with clear tubing

Any help greatly appreciated

Attachment 160990

Sounds like the fuel shut solenoid is sticking for the running on problem.
Check the fuel primer on the filter, if you prime it up firm and it starts first pop you may have a leaking diaphragm letting fuel bleed back from filter when stopped.

Quote:

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Originally Posted by veitnamcam

Sounds like the fuel shut solenoid is sticking for the running on problem.
Check the fuel primer on the filter, if you prime it up firm and it starts first pop you may have a leaking diaphragm letting fuel bleed back from filter when stopped.

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It fires up first pop with a good hand prime to firm, takes quite a few pumps to get it firm too so I think you are spot on
I also pumped till it pressurised up and left it and in like 20 seconds or less it's soft again with the engine off

if it runs with those wires unplugged they might be for a rpm gauge

That would be handy my rev counter stopped working years ago

Quote:

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Originally Posted by northdude

if it runs with those wires unplugged they might be for a rpm gauge

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Agree

If its anything like my mechanicaly injected Nissan Patrol and mechanically injected Chevy 6.5 diesel powered Landy, those 2 wires operate the cold start advance. Lowers the IP housing pressure so advances by a couple of degrees the injection timing? Makes the engine sound clattery till its warm.
My 2cw

OH, are there any 1KZTE experts here? I have one and am interested in making some extra power.

The motor will be getting a full strip and decked head, probably a new pump and turbo, injectors etc total birthday etc too. So any suggestions appreciated.

Cheers.

does it have a map sensor or air flow meter

Quote:

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Originally Posted by Bill999

Iv got a 1kz that had the dreaded electric computer powered injector pump
It's ran with a chuf and occasional shake at idle and generally ran not the best
Iv just fitted with the help of a mate a 2.8 hilux manual pump to get over this issue, with the new pump on it runs better but I can see the issue is still there, anyway it's mid project and I'm really curious to know what the plug on top of the 2.8 injector pump is with the two blue wires?
It's obviously not critical as I'm able to drive the truck but it's doing a couple of funny things that I'm thinking I might be able to remedy if I know what it is,

Some of the odd things
Runs for 3-4 seconds after turning off the key then shuts down
Bit hard to start like there is air getting in the feul line somewhere(did this with the old injector pump too) Will chase this down with clear tubing

Any help greatly appreciated

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Quote:

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Originally Posted by 40mm

OH, are there any 1KZTE experts here? I have one and am interested in making some extra power.

The motor will be getting a full strip and decked head, probably a new pump and turbo, injectors etc total birthday etc too. So any suggestions appreciated.

Cheers.

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@kokako might have some ideas.

Its got a map sensor but I'm pretty sure I have made it obsolete with the manual pump, I'm pretty sure the ecu just does the glow plug timing now

Quote:

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Originally Posted by 40mm

OH, are there any 1KZTE experts here? I have one and am interested in making some extra power.

The motor will be getting a full strip and decked head, probably a new pump and turbo, injectors etc total birthday etc too. So any suggestions appreciated.

Cheers.

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https://youtu.be/NP9R527VvXQ

This guy and kaiapoi repowers will be the trick, one of their race pump hybrids and the turbo to match that they sell intercooler & 3inch exhaust & dump pipe (that's like 6k so far in bits and what I'd like to do but I'm gunna be happy if mine just runs well)

I'm going the cheep route (boost tee and manual injector pump) just to get its power restored to where it should be or a bit above but in a safe way.

Two wires are rev counter, first problem, have you overhauled the injectors and checked valve clearances?
Can you put up a picture on intake manifold so I can id the motor,
Also please don’t go to repowers unless you have 4 spare engines lying around

Quote:

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Originally Posted by longrange308

Two wires are rev counter, first problem, have you overhauled the injectors and checked valve clearances?
Can you put up a picture on intake manifold so I can id the motor,
Also please don’t go to repowers unless you have 4 spare engines lying around

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@longrange308 are repowers no good?

Correct unless you like replacing engines

we used to do a lot of repowers back in the day not high performance diesels tho put diesels into campervans tho. You need to know what you are doing if you start playing with turbos on some of the diesels tho pretty quick way to blow one up...

Quote:

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Originally Posted by northdude

we used to do a lot of repowers back in the day not high performance diesels tho put diesels into campervans tho. You need to know what you are doing if you start playing with turbos on some of the diesels tho pretty quick way to blow one up...

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I think 'repowers' is a brand name.
I am keen to fit a 1kzte into my hiace 4wd

mitsi mechanical 4m40 pump meant to be an upgrade for the toyotas. Bit of a shag around i think though

Quote:

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Originally Posted by longrange308

Two wires are rev counter, first problem, have you overhauled the injectors and checked valve clearances?
Can you put up a picture on intake manifold so I can id the motor,
Also please don’t go to repowers unless you have 4 spare engines lying around

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Attachment 161008

I'm nearly at the point where I'm ready to do injectors it's just been running so bad up till this point I didn't want to be pissing away on things problem solving when there was a hidden fatal flaw of the engine, it's been a bit of a dog for me this far

The Fuel shut off/spill valves are on the pumps so unless your unlucky and both are faulty...
The 1KZ has a throttle plate (the one you have wired open?) They help with a smooth quick shut down also for EGR operation I believe. They can be removed and they still shut down quickly just with more of a jolt.. But with it wired open and possibly leaky injectors its able to run on I guess, no doubt the injectors have done plenty of KS
Have you checked the intake pipe and manifold? They get well blocked up with crud!
Check all fuel lines and Primer for leaks.
Have you checked if heads cracked?

Best put an EGT gauge on there, don't want to much fuel/heat going in... or you'll be replacing the head soon if its not all ready cracked...
Intercooler is a good idea if putting in more fuel.

To be fair the factory 1kz pumps are fine, you can tweak the fuel a little on the 1kz spill valves for a little more power, 1KZ have a boost cut 14psi think it was. can get boxes/chips to get rid of it...

I was thinking it ran on a little longer than usual possibly because the wire used to provide 12v to the pump probably cuts off voltage a bit more slowly than the factory ecu driven one, I'm not super worried about it taking a 2-3 second delay to turn off if it runs and idles fine. Still shuts down just fine and nicely just a noticeable delay
I'll chase down the diesel leak back issue and see if that's causing more than just the sluggish start. Monitoring is next ie boost & temp gauges.
Looking at what's required to fit an EGT properly, that it will likely be a down the road when she is running nice job, or at exhaust change time if I get that far. Looks like a prick of a job to do properly in the correct location and taking off the hot side isn't on the cards for the moment. probably just a aftermarket water temp And boost gauge.

I'll give that Wynns EDT product a shot before replacing the injectors, I'd say there's a little bit of air sneaking in which I am hoping is at the hand pump/filter housing, when that's gone I'd say things might idle a bit nicer.

I think I'm pretty close to "rough enough" but I don't want to cook the thing in the process so I'm going to get on to the gauges so I get a little bit of feedback on what it's doing when out on the road for the final dial in when I match the boost to the feul level I choose
The thing has barely run up till this point so I'm all for simplicity, ecu/electronic 20+years on starts to get shakey at best.
Bieng just a boat puller/second truck my 1kd lux can take up the slack till I'm happy with everything's effect on the motor and I'll take it in for a final tickle up and tune by a diesel guru Iv heard of in town