HJ78 Starting issues

[constablechris]

Hi People

I have a HZJ78 troop carrier fitted with an aftermarket Safari Turbo.

A couple of weeks ago I had idle issues and can only get the car to idle (at 800) by adjusting the hand throttle.

Then I started to have starting issues. When the motor is warm the car would not start or would take a lot of turns of the key to start it. Then it would sort of sound like it was loosing compresion then start.

I have run a tank directly to the injector pump so I know there is fuel available tot eh pump, I changed the fuel stop solenoid to see if that was the issue. That was okay for a bit, but then it went off again.

I note when it wont start there isnt fuel getting through to the injectors, so I still feel it is linked to the stop solenoid. Is this thing connected to any other solenoids or readers like the oil pressure or something that could be playing up? I have tried to read the wiring diagram with no success.

I dont want to remove the solenoid but may have to try and see if taking out the little stopper makes a difference.... will that cause any issues for a one or two trying type thing other than I will have to use the gear box to kill the car...

I also tried jump starting the car and that works with varied success. Extra cranking power, but there is a new battery in it at the moment.

Any advice on what it could be would be greatly appreciated.

I note this stuff only ever happens when I have holidays and ahve fishing trips planned. Never when I could do with a day off work for no reason other than the car wont run....

Regards

Chris

Does anyone know

 

[Squash]

You could crack the injector lines at the intake side and visually confirm that fuel is being pumped.

Then back track to solenoid.

If you take out the solenoid check out the filter, this is a fine mesh filter and is meant as the final check.
If you have an ACSD and the solenoid filter is dodgy then you have another issue.

Solenoid and filter diagram below.
https://forum.ih8mud.com/diesel-tec...d-help-acsd-expertise-wth-injection-pump.html

 

[constablechris]

Hi Squash

Nah no ACSD me thinks, i am in australia up north and I dont know they put that thing on, but after viewing a photobucket video I will have a look to see if there is one..

I note when it wont start, there is no fuel to the injectors, but there is heaps available as I am using a clean fuel supply directly to the injector pump intake.

Which makes me think it is somehow connected to a solenoid issue, as I dont always hear the slight click of the solenoid opening. As I know my new solenoid is good, I wonder if other solenoids are linked into that one? Like oil pressure or water temp or anyway whatever may be there.

Anyway I will remove teh solenoid tomorrow and see what happens

Chris

 

[Traveller]

Perhaps try voltage on The solenoïde and See of problem is solved..

 

[roscoFJ73]

Hi Squash

Nah no ACSD me thinks, i am in australia up north and I dont know they put that thing on, but after viewing a photobucket video I will have a look to see if there is one..

I note when it wont start, there is no fuel to the injectors, but there is heaps available as I am using a clean fuel supply directly to the injector pump intake.

Which makes me think it is somehow connected to a solenoid issue, as I dont always hear the slight click of the solenoid opening. As I know my new solenoid is good, I wonder if other solenoids are linked into that one? Like oil pressure or water temp or anyway whatever may be there.

Anyway I will remove teh solenoid tomorrow and see what happens

Chris

It could be the power supply to the solenoid .They are not connected to other solenoids and they are not connected to oil pressure,temp .
There is a start relay I think
No ACSD on aussie 1HZs but I would check the fine mesh filter under the banjo bolt where the fuel enters the engine.

How many klms has the pump and engine done Chris?

 

[Aussie 25]

There is a filter under the solinoide. I think it sounds like the injector fuel pump. with some one in the car , pump your primer pump around 15 times when it starts to go hard start the engine while you are stil pumping. if it starts easy i think the fuel pump in the frount of the injector pump is going

 

[roscoFJ73]

if it starts easy i think the fuel pump in the frount of the injector pump is going

But he has tried a fuel can next to the fuel pump. It would work fine if you gravity fed the fuel to the pump.

 

[constablechris]

Hi Rosco,

Pump has done about 8ooo km. since rebuild.

Aussi

Appears you are right.. I use home made bio diesel, but had my front tank about 1/2 full of regular diesel from a trip last year. About three weeks ago I decided to use some of it up so I could fill the tank with Bio, and as I drove I had some issues where it was surging and farting a little. I stopped and emptied my water seperator bowl but then couldnt start it again till it cooled down. I appears enough crap wnet through and stuffed my hydraulic head....

I sumise this as I removed the stop stopper and still, when the car was hot, could not start it. Did some reading and I think that is the outcome.

This was agreed to by a local injector bloke who says this is an issue (that costs about 1600.00) with this particular pump. He also wants to slean my injectors just in case for a couple of hundred extra.

Anyone rebuilt an injector pump? How hard is it? Biggest worry to me is the getting it off bit....

ANyway that is where is stands at the minute. Runs fine but dont turn it off when its hot cause it wont start till it cools down...

Regards

Chris

 

[roscoFJ73]

Hi Rosco,

Pump has done about 8ooo km. since rebuild.

Aussi

Appears you are right.. I use home made bio diesel, but had my front tank about 1/2 full of regular diesel from a trip last year. About three weeks ago I decided to use some of it up so I could fill the tank with Bio, and as I drove I had some issues where it was surging and farting a little. I stopped and emptied my water seperator bowl but then couldnt start it again till it cooled down. I appears enough crap wnet through and stuffed my hydraulic head....

I sumise this as I removed the stop stopper and still, when the car was hot, could not start it. Did some reading and I think that is the outcome.

This was agreed to by a local injector bloke who says this is an issue (that costs about 1600.00) with this particular pump. He also wants to slean my injectors just in case for a couple of hundred extra.

Anyone rebuilt an injector pump? How hard is it? Biggest worry to me is the getting it off bit....

Nyway that is where is stands at the minute. Runs fine but dont turn it off when its hot cause it wont start till it cools down...

Regards

Chris

Thats bad news ,the distributor head on its own was over $500 6 years ago.Inside the head you have the plunger sliding back/forwards.The tolerance is so slight you can barely see the wear.
Once they have some wear they have problems building enough pressure to open the injectors and this is probably why it wont start warm.
When its cold everything contracts and it has a little more pressure
Its a job for a specialist .
I would ask him how much it would be to remove,it would be a few hours work for an experienced diesel mechanic with the tools and you would have to pay again to refit it.
The method for taking it off is simple but pulling the gear off the pump can be a pita.I hired a puller and it was bending and distorting but after a day or 2 it let off this almighty crack.
I thought I had broken something expensive,but it had come off.

I would try some injection cleaner 1st and see if that makes a difference.Toyota Aust make a good one.
PM sent

 

[Aussie 25]

When its hot turn it off pump the primer about 20 times and see if that makes any difference in starting.

 

[constablechris]

Hi Aussie

I dont have a primer on mine, I fitted a Parker filter system to mine and just fill the filter and put the lid on if needed and away I go. What does that do? Pumping it I mean (other than priming it and putting presure on the pump)

Rosco, I did run a cleaner through it and had also run some auto transmission fluid through it as a cleaner. Makes the injectors sparkle I tell you and it cleans out any crud that has built up. Amazing stuff

PM sent

Chris

 

[Aussie 25]

Hi Cris, pumping the primer putes pressure in the pump, also removes any air if their is any. i have had a 105 that did the same thing and it turned out to be the fuel pump in the frount of the pump. I put one out of a 1996hzj75 in. It had no plooshion s*** on it and had to pull a wire out of the computer to get the falt light out. Didnt chang the injectors and it goes well.