Does Landcruiser 100 series 1HZ have a computer chip?

Submitted: Sunday, Jan 27, 2008 at 22:07
ThreadID: 53942 Views:15313 Replies:7 FollowUps:14
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Howdy folks...

having a good long w/e?

Um, as per question in the topic, do the 1HZ's have a computer chip. If so, when did they come in? I have an 80 series with ~year 2000 100 series 1HZ. real happy with it but curious...

Cheers in advance...

Ro
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Reply By: Steve from Top End Explorer Tours - Sunday, Jan 27, 2008 at 22:14

Sunday, Jan 27, 2008 at 22:14
NO

Cheers Steve
AnswerID: 283993

Follow Up By: Member - Crazy Dog (QLD) - Sunday, Jan 27, 2008 at 23:04

Sunday, Jan 27, 2008 at 23:04
Steve,

Didja get my email?

Grrr!!!
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FollowupID: 548710

Follow Up By: Steve from Top End Explorer Tours - Sunday, Jan 27, 2008 at 23:09

Sunday, Jan 27, 2008 at 23:09
Yeah it's on the other computer, I just found it, I will get back to you after dinner.

Cheers Steve.
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FollowupID: 548713

Reply By: Footloose - Sunday, Jan 27, 2008 at 23:14

Sunday, Jan 27, 2008 at 23:14
Nope. The 1Hz is an old fashioned old technology power plant. And that's it's beauty. No puters, no limp home mode, nothing that can't be fixed by a good bush mechanic.
Treasure it because AFAIK there won't be many similar engines in the new 4wds.
AnswerID: 284002

Reply By: Member - Matthew ,United Fuel- Monday, Jan 28, 2008 at 00:40

Monday, Jan 28, 2008 at 00:40
If its the later 100/105 series then the answer is YES,the have an EGR controller which also controls the timing control valve & vacuum signal to the DAC on the pump which can greatly effect power but not cause any fatal problems.

Matt
AnswerID: 284013

Follow Up By: Steve from Top End Explorer Tours - Monday, Jan 28, 2008 at 00:46

Monday, Jan 28, 2008 at 00:46
I have an 03 1hz and it doesn't have a computer chip.

Please explain.

Cheers Steve
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FollowupID: 548726

Follow Up By: Member - Davoe (Yalgoo) - Monday, Jan 28, 2008 at 01:04

Monday, Jan 28, 2008 at 01:04
Dunno bout a chip but the later 1hz certainly do have extra doohickey watsamacalits on the fuel pump
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FollowupID: 548728

Follow Up By: Wayne (NSW) - Monday, Jan 28, 2008 at 08:35

Monday, Jan 28, 2008 at 08:35
Steve,

If the motor is factory turbo it should have a chip, if non turbo then I don't think that you would have one.

Wayne
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FollowupID: 548748

Follow Up By: Rossco105td - Monday, Jan 28, 2008 at 11:42

Monday, Jan 28, 2008 at 11:42
G'day,

As Davoe mentioned they do have an electronic fuel cut set-up with a solenoid on top of the fuel pump (an integral part of the factory security system on 105 1HZ cruisers).

If this system stuffs up the car is unmoveable. Happened recently to mine, fortunately in the CBD. With some modifications it is much easier to access.

As far as I know it doesn't have a factory engine management ECU, good old mechanical injection...

Cheers
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FollowupID: 548810

Reply By: Member - DOZER- Monday, Jan 28, 2008 at 09:52

Monday, Jan 28, 2008 at 09:52
The 1hz is still an old technology fuel system, but even it has had some chips hung off it...the 105 is full of chips that run all sorts of things, but not the fuel system.
To point out the difference....a friend swamped his 2003 1hz gxl in a river....he pulled it out of the river with aid of a tractor and camped by the creek 3 days before driving it 250kms home....he was draining the water trap every 10kms, but he made it home.....pity insurance wrote it off and then onsold it, bodywork undamaged for 15k to someone who knew how to dry it out. It had water in everything. The only things that obviously didnt work properly were the door locks and windows.
A hdfte would still be besides the river, or would have needed towing further to where a towtruck could get to it.
Andrew hdft 80 series
b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)

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AnswerID: 284041

Reply By: Member - Tour Boy (springsure- Monday, Jan 28, 2008 at 10:45

Monday, Jan 28, 2008 at 10:45
Hi guys,
Dad's 04 GXL with the 1HZ has engine management fuses and ecu fuses so I would say yes especially looking at the wires around the pump.
Won't be fully controlled but some things are.
Regards
Dave
Cheers,
Dave
2010 Isuzu FTS800 Expedition camper
2015 Fortuner
Had 72 cruisers in my time

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AnswerID: 284059

Reply By: Steve from Top End Explorer Tours - Monday, Jan 28, 2008 at 11:55

Monday, Jan 28, 2008 at 11:55
The answer is NO they don't have a computer chip as I first suggested.

Especially the 2000 model I have 3 2000 plated engines in my front yard 1 in an 105 series 1 in a Troopy and one out of a Troopy I wrecked last year, None of them have a computer chip, The 2002 and 2003 105 series I own don't have a computer chip either.

The 2003 Has the TPS valve, I believe is called a Throttle Position Sensor Valve, these are manually adjusted as this is what they did to my car in cairns 4 weeks ago.

Cheers Steve.
AnswerID: 284072

Follow Up By: Member - Matthew ,United Fuel- Monday, Jan 28, 2008 at 14:06

Monday, Jan 28, 2008 at 14:06
Steve

Not wanting to cause arguments but remove the glovebox on a TPS/EGR equipped 100/105 series and you will find the EGR control module which acts on the vacuum soleniods that operate the DAC on top of the pump.Remove the vacuum line that goes to the base of the DAC and test drive the vehicle and report back to me your findings.

They also have a TCV fitted to the base of the fuel pump that is controlled by the same controller.

These are the FACTS.

MAtt
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FollowupID: 548831

Follow Up By: Steve from Top End Explorer Tours - Monday, Jan 28, 2008 at 14:27

Monday, Jan 28, 2008 at 14:27
So you are saying I can put a chip in my car to enhance it's performance.

I am very certain this is why the question was asked, not only that but he has a 2000 model engine that certainly doesn't have a chip.

I'm not sure which vacuum hose you are referring to, but we disconnected one of those hoses first as shown to me by a diesel mechanic, this sorted the problem to a point, then I took it to Toyota and they adjusted the TPS valve this fixed the problem.

I have since reconnected the hose and it made no difference.

Steve
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FollowupID: 548834

Follow Up By: Member - Matthew ,United Fuel- Monday, Jan 28, 2008 at 19:05

Monday, Jan 28, 2008 at 19:05
No definately not.

I am trying to highlight the fact that people need to be aware that the later model 1HZ diesels are controlled to some degree by electronics.They are not only mechanically controlled.

The TPS you refer to is ONLY for EGR control and in all honesty if you haven't fitted a ball bearing in the vacuum line to the actuator or plated of the pipe at the manifold then you should look into doing that as it will save the engine filling up with carbon and choking .

Matt
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FollowupID: 548906

Follow Up By: Steve from Top End Explorer Tours - Monday, Jan 28, 2008 at 19:14

Monday, Jan 28, 2008 at 19:14
That is the hose I disconnected and it made little difference, thats why I reconnected it.

I have a manifold that is off the 2000 model, could I simply change that for the one that has that EGR unit on it ????

As for the rest I understand what your saying.

Cheers Steve.
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FollowupID: 548909

Follow Up By: Member - Matthew ,United Fuel- Monday, Jan 28, 2008 at 19:24

Monday, Jan 28, 2008 at 19:24
Steve

Just let me understand what you have exactly.

The crossover pipe from aircleaner to manifold does it have the actuator on it ?

The exhaust manifold does it have the pipe coming from the rear to the actuator pipe.?

Have you put an early model engine/pump in a late model vehicle?

Is it aftermarket turbo?

Matt
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FollowupID: 548914

Follow Up By: Steve from Top End Explorer Tours - Monday, Jan 28, 2008 at 19:35

Monday, Jan 28, 2008 at 19:35
The car is a 2003 non turbo 1hz.

While on holidays it was belching smoke out on acceleration, a mechanic at the van park said block that hose off the one from the EGR to the switch, I did this and it stopped it a little, but in the morning if you accelerated say up a hill it would belch smoke again it seems untill it warmed up.

So I took it to Toyota and they adjusted the TPS valve, it worked for a while so I reconnected the hose again.

It still blows smoke but it seems only when it is close to changing the oil.

I am heading into Darwin this week and will see a mate who spent 98% of his time at Toyota.

Cheers Steve
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FollowupID: 548917

Follow Up By: Member - Matthew ,United Fuel- Monday, Jan 28, 2008 at 20:54

Monday, Jan 28, 2008 at 20:54
Steve

I would be putting a ball bearing in the hose to the actuator on the manifold and putting the hose back on.With the hose disconnected there is a greater vacuum drop and this doesnt allow enough vacuum to pull on the DAC sometimes causing slight low power problems.

Are there any problems with it now.???

Matt
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FollowupID: 548949

Follow Up By: Steve from Top End Explorer Tours - Tuesday, Jan 29, 2008 at 23:58

Tuesday, Jan 29, 2008 at 23:58
No it just needs a Service, I will do that tomorrow.

Cheers Steve.
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FollowupID: 549186

Reply By: Member - Davoe (Yalgoo) - Monday, Jan 28, 2008 at 20:43

Monday, Jan 28, 2008 at 20:43
Just to confuse the issue my 1hz 80 has a diognostic plug
- however it also has alot of other wires that appear to not go anywhere and have no function
AnswerID: 284199

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