Will a diesel run with a flat battery

Submitted: Monday, Jun 02, 2008 at 19:48

ThreadID: 58301 Views:11564 Replies:7 FollowUps:13

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Member - Cruiser (NSW)

I have a friend who is away at the moment and has a 100 seies turbo diesel that has both batterys failing (about 4 years old) and he has been told that if the batterys go flat or die while the car is running that the motor will stop.

Any thoughts on that.

I was under the impression that as a diesel uses compression to run as opposed to ignition, then it will continue to run without a battery.

Obviously a battery is required to start it (probably via jumper leads) but will it continue to run without a fully chatged functional battery.

Cheers,

Cruiser

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Reply By: autosparky - Monday, Jun 02, 2008 at 19:57

Reply By: Member - 120scruiser (NSW) - Monday, Jun 02, 2008 at 19:58

Reply By: Member - DOZER- Monday, Jun 02, 2008 at 19:59

Monday, Jun 02, 2008 at 19:59

Mate, as long as the alt is charging, the motor will run...if his accessories are such that they use the 120 amps the alt can supply, he has a very large sound system in there and should turn it down :)
Once the motor stopps, thats a different story...it will never go again if it a factory turbo unit with EFI computer.
Andrew

AnswerID: 307371

Follow Up By: Member - Doug T (FNQ) - Monday, Jun 02, 2008 at 20:27

Monday, Jun 02, 2008 at 20:27

DOZER
Oh how wonderful it is to own and drive a non computerised , standard basic true 4x4,with $18 headlights, no central locking, no electric windows, no turbo, no air bags,

.

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FollowupID: 573235

Follow Up By: Member - Oldplodder (QLD) - Monday, Jun 02, 2008 at 20:47

Monday, Jun 02, 2008 at 20:47

Doug,

Did you forget the fuel solenoid valve?
OK while the alternator provides power, no good otherwise :O0

I do however liking my old diesel too with mechanical injection.
Onlyned about 6 to 8 volts and a hill to clutch start it. O0

FollowupID: 573237

Follow Up By: Member - Doug T (FNQ) - Monday, Jun 02, 2008 at 20:55

Monday, Jun 02, 2008 at 20:55

Oldplodder
Yeh once going you can disconnect the battery, the Fusable link can be a minor problem sometimes, I had a problem once with that over heating and getting very hot due to an alternator problem , just connect it to start and then disconnect it again.

.

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FollowupID: 573238

Follow Up By: Member - Crazy Dog (QLD) - Monday, Jun 02, 2008 at 21:59

Monday, Jun 02, 2008 at 21:59

Not true about the air bag - he drives it...LOLOL

By the way Doug - how is the "New Program" that I sent you as payback for the fake formatter ya sent me eh?

Grrr!!!

FollowupID: 573254

Follow Up By: autosparky - Monday, Jun 02, 2008 at 22:53

Monday, Jun 02, 2008 at 22:53

100 series after 2002 are common rail in t/d

FollowupID: 573267

Follow Up By: Member - Davoe (Yalgoo) - Tuesday, Jun 03, 2008 at 00:17

Tuesday, Jun 03, 2008 at 00:17

You sure about that? I dont think and cruiser came out with a common rail injected 6 cyl

FollowupID: 573275

Follow Up By: Member - Brett C (WA) - Tuesday, Jun 03, 2008 at 00:57

Tuesday, Jun 03, 2008 at 00:57

Just spoke to a friend who is a Service Manager for a Toyota Dealership in the Southern Suburbs of Perth. He said the hungy never had common rail injection.
Brett....

FollowupID: 573282

Follow Up By: Grungle - Tuesday, Jun 03, 2008 at 07:32

Tuesday, Jun 03, 2008 at 07:32

Not common rail but direct injection so still computer controlled.

Regards
David

FollowupID: 573294

Follow Up By: Member - Oldplodder (QLD) - Tuesday, Jun 03, 2008 at 08:16

Tuesday, Jun 03, 2008 at 08:16

Yeah,

Same going from the 2.8 diesel I have to the 3.2 diesel in the NM/NP (2000 - 2007).
I am purely mechanical., with a 'bosch' style rotary pump and direct injection, while the 3.2 has the same system but with computer controlled rotary pump. Still pump to mechanical injector injection, just better pump control, and no common rail. Electronic throttle, and a few sensors on the 3.2 that need the right voltage.
New NS (2008) pajero has full level 2 common rail with solenoid controlled injectors.
Those 2008 emission controls brought in by the government changed a few things in the diesel world, like the death of the 4.2 in the nissan, and the birth of the D4D in the toyotas. All the diesel utes have now gone full electronic common rail. They get good economy though.