How many cranks before start? (1 Viewer)

[leonard_nemoy]

My rig averages 2.69420 cranks per successful start.

 

[Broski]

My rig averages 2.69420 cranks per successful start.

And the unsuccessful starts ?

 

[77mustard40]

Thanks for all the background noise and chuckles from this thread. I’ll sleep well tonight knowing my 225k mile dinosaur is probably doing just fine (for now)

 

[LandLocked93]

Wait'a dam minute!
How cold is cold? AND @ what voltage?
I've noticed a time delay of over 1 second between when I turn the key to start and when the starter kicks to turn the engine over @ or around the 30degF and 12V.

 

[leonard_nemoy]

And the unsuccessful starts ?

It's a land cruiser, we don't talk about the unsuccessful starts.....

 

[LockedCollector]

I’ve never really noticed how many cranks it takes to fire up because I‘m always too busy lowering the damn volume down my radio from the last time I was enjoying driving it.

 

[Dave 2000]

Dave:

Remember, the fuel pump on the 1FZ-FE does not run until it is actually cranking. Just turning the key to "run", then off, then start will have no effect on fuel pressure.


FWIW, my 96 DD w/ 326K still takes 4-5 cranks before it fires regardless of hot or cold.

I am also still on my original fuel pump and fuel filter. The sock in the tank has been confirmed clean when I changed my cracked tank about 70K ago. The inside of my old tank was clean as a whistle. Changed my CC with no change to cranking starts. Changed the gas cap at that time as well.

Could be a slightly weak fuel pump or injectors that weep and bleed down the pressure in the lines, but if you still drive it, it's not catastrophic and it will still do its job a long while.

But, if you're OCD or do a lot of remote stuff, consider changing the fuel pump and filter as PM.

Not had the time to read the rest of the thread however, I seem to remember the fuel pump runs for a few seconds as you switched on the ignition? And then stopped if you did not crank the engine, if you went straight from ignition to crank then thew pump would stay running?

Perhaps I have been (until September last year) been working on too many modern vehicles including diesels that all 'pre prime' the engine before it starts?

Regards

Dave

 

[BILT4ME]

Not had the time to read the rest of the thread however, I seem to remember the fuel pump runs for a few seconds as you switched on the ignition? And then stopped if you did not crank the engine, if you went straight from ignition to crank then thew pump would stay running?

Perhaps I have been (until September last year) been working on too many modern vehicles including diesels that all 'pre prime' the engine before it starts?

Regards

Dave

Most of the modern vehicles do that, but the 1FZ-FE does not. Only while the engine is turning over will the pump run unless shorting it for diagnostic purposes.

 

[Dirt Ferguson]

Wow, that’s good knowledge. @Broski @TYM4FUN

I feel like one of the sicknesses of being a part of MUD is the desire to be a maximalist on everything. I prefer a minimal approach to most things, so hearing feedback like this is great.

I understand there are some people who want to run 18 lights, a disco ball, blender and a hot tub for a few days at camp [cough]overlanders[/cough] and a dual battery/ solar set up is the way to go, but I’m not one of those people.

 

[beatle_bayly]

Would differences in ignition timing make a difference?

I counted 4 'cranks' in Andrew Bluemel's video. That's about the same as mine. I recently cleaned and greased the starter and it certainly cranks over faster now, but I think it actually takes a couple more rotations to start. i.e. about the same total time to fire, pre and post starter clean.

I've owned lots of petrol engined vehicles and can't say I've noticed the FZJ has a delayed start in comparison. On my diesel vehicles they mostly fire on the first rotation.

 

[flintknapper]

Not had the time to read the rest of the thread however, I seem to remember the fuel pump runs for a few seconds as you switched on the ignition? And then stopped if you did not crank the engine, if you went straight from ignition to crank then thew pump would stay running?

Perhaps I have been (until September last year) been working on too many modern vehicles including diesels that all 'pre prime' the engine before it starts?

Regards

Dave

^^^^^

Nope.

I know it has already been answered, but I want to reiterate (because this seems to come up often) that the fuel pump does NOT 'prime' the fuel system on either the 80 series or the 100 series with the key in the 'on' position.

Only when cranking the engine and then again when the engine starts.... does the circuit energize.

 

[Dave 2000]

Not going to argue about it, since the surgery there are times I can barely remember my name. Is it possible then that the fuel pump or somewhere in the line there is some sort of anti drain back valve/accumulator to prevent fuel running back to the tank causing a delay in the the amount of time it takes to start the engine?

Consider this, the fuel tank is lower than the head of the engine where the injectors are, in theory when you shut off the engine, like a finger over top of a straw full of milk the milk will not drain, remove your finger and the milk runs out so, if there is the smallest of air leaks in the system then the fuel could run back to the tank right, or there must be something that stops all the fuel running back to the tank?

Regards

Dave

 

[beatle_bayly]

I've seen a few videos where people turn the key and the 80 fires right up, just wondering if this prolonged crank is indicative of something needing attention.

Going back to the original question, I don't believe anything needs attention. It ain't broke, so don't try to 'fix' it.

 

[FMC80]

Going back to the original question, I don't believe anything needs attention. It ain't broke, so don't try to 'fix' it.

Negative. Something is definitely not wrong but still will be fixed damn it.

 

[flintknapper]

Not going to argue about it, since the surgery there are times I can barely remember my name.

There would be nothing to argue about. The system is exactly as I stated. We all wish you a complete and speedy recovery after your surgery.

Is it possible then that the fuel pump or somewhere in the line there is some sort of anti drain back valve/accumulator to prevent fuel running back to the tank causing a delay in the the amount of time it takes to start the engine?

Consider this, the fuel tank is lower than the head of the engine where the injectors are, in theory when you shut off the engine, like a finger over top of a straw full of milk the milk will not drain, remove your finger and the milk runs out so, if there is the smallest of air leaks in the system then the fuel could run back to the tank right, or there must be something that stops all the fuel running back to the tank?

Regards

Dave

Yes.

 

[davidp14]

Mine took quite a few cranks to start when I first brought it home.

After new evap system, ignition overhaul, and new battery it takes less cranks but still more than many of the other vehicles I've owned, especially when cold.

The important part is it starts.

 

[pjs1193]

My 1fz always fired on 2 second crank whether it was hot/cold (both outside temp and running temp) then one day it started firing on the 4th crank and that’s the way it’s been ever since.

 

[Dirt Ferguson]

Negative. Something is definitely not wrong but still will be fixed damn it.

I might not “fix” anything but Broski and TYM definitely have me interested in a big boy battery like the Odyssey Extreme 31A.

If I’m not fixing it, or breaking it, I’m thinking about how I can throw money at it. Lol.

 

[flintknapper]

My 1fz always fired on 2 second crank whether it was hot/cold (both outside temp and running temp) then one day it started firing on the 4th crank and that’s the way it’s been ever since.

^^^^

It went through puberty.

 

[Dave 2000]

The diesels start before you turn the key to crank!
Regards

Dave