oh dear

[kbekl]

I would have thought that the battery would stabilise the voltage to set limits, so that it would absorb surges. Without the battery, switching on the headlights would cause the voltage to drop, seen as a negative spike before the alternator/regulator trys to supply more voltage.
If you then switch off the headlights, there will be a positive spike, as the alternator/ regulator over compensates.

These spikes can damage delicate electronics, the battery even in poor condition will act as a capacitor in a power supply, averaging the changes.
Thus keeping a smooth dc supply.

If the load exceeds the capacity of the alternator, the voltage will be well down.

Just because they can run, doesn't mean that equipment cannot be damaged.
Spikes sometimes damage the delicate static sensitive electronic components that eventually show up as a premature failure down the line.

Personally I wouldn't do it.
It's ok for the lawn mower and outboard engine, and diesel gennies, but not ecu's etc.

mine aint got an ecu

the only reason i did it was to see if that was the reason for the battery to be dead

with the engine ticking over i poped the + side off the bat to see if the alternator was working properly and to this the car dies now thats to me says the alternator isnt working and that is how i have always tested the alternator and have never had a problem ok yes if you were using electrical devices then it could cause a problem due to spikes

right with the alternator which is 3mths old to have gone us and the hole in the wing + i think i have a damaged suspention mount and the steering playing silly buggers (keeps going stiff as at points then freeing off)

+ the fact that i think i have a weak clutch (when off roading was loosing power but gaining revs up hills) and the 5th gear test takes about 5 seconds to stall

i think i am going to call it a day for this mav

really sorry to all those that have tried to help me along with me being stupid and one thing and another :bow:bow:bow:bow:bow

i will stay with the forum tho as i think you all are a good bunch and always willing to help:thumbs:thumbs:thumbs:thumbs but the mav/terrano have a few points i didnt like

such as the boot space when using 7 seats and the motorway speed (cant travel to cornwall doing 62 every time) i think i will be looking at other 4x4's or even just get play toy so the main motor wont be broke again but it will have to be a 1.1 or somthing due to insurance costs having 2 cars

 

[makeitfit]

Gorden bennet you lot oop north have gone all light wieght:doh
Alt neednt be dead from a few puddles, I regulary sink mine and never been a problem. If you put a power supply to the pump solenoid the engine will run. No elecs needed for the engine
I still reckon these trucks are the cheapest off road/on road fun all rounder
Hey ho good luck with your next choice:homer

 

[kbekl]

Gorden bennet you lot oop north have gone all light wieght:doh
Alt neednt be dead from a few puddles, I regulary sink mine and never been a problem. If you put a power supply to the pump solenoid the engine will run. No elecs needed for the engine
I still reckon these trucks are the cheapest off road/on road fun all rounder
Hey ho good luck with your next choice:homer

i dont know been looking at paj and shoguns, they have a bigger boot overall and also come with locking diff like for like they come in at around the same price

also been looking at the trooper

i think they also have a higher ride height and more comfort that an the mav with cruise control and electric heated leather seats lol

been look for a decent lwb diesel mav/terran we are talking £1000 with tax and test for the paj shogun looking at about £950-£1100 depending on spec

i have to admit a Mercedes 300 gd had caught my eye a little

 

[jims-terrano]

Sorry to hear that Karl, got to say this is a surprise "cant travel to cornwall doing 62 every time". Ask Brggie, the non TDi does better than that and the TDi does better still.

Jim

 

[kbekl]

Sorry to hear that Karl, got to say this is a surprise "cant travel to cornwall doing 62 every time". Ask Brggie, the non TDi does better than that and the TDi does better still.

Jim

briggies is an auto do different ratio

thats sat at the most econimical way at 2500rpm it will go faster and i have had it at 80 but you suffer real bad fuel economy the mpg drops to about 18 on mine if i sit at 70

 

[paulp]

mph

sod that i have had 90+ showing on my speedo (private road your honour) loaded with camping gear et al

2.7 td same as the Mav - not a TDi

paulp

 

[solarman216]

I would have thought that the battery would stabilise the voltage to set limits, so that it would absorb surges. Without the battery, switching on the headlights would cause the voltage to drop, seen as a negative spike before the alternator/regulator trys to supply more voltage.
If you then switch off the headlights, there will be a positive spike, as the alternator/ regulator over compensates.

These spikes can damage delicate electronics, the battery even in poor condition will act as a capacitor in a power supply, averaging the changes.
Thus keeping a smooth dc supply.

If the load exceeds the capacity of the alternator, the voltage will be well down.

Just because they can run, doesn't mean that equipment cannot be damaged.
Spikes sometimes damage the delicate static sensitive electronic components that eventually show up as a premature failure down the line.

Personally I wouldn't do it.
It's ok for the lawn mower and outboard engine, and diesel gennies, but not ecu's etc.

Yes you are correct the battery provides a smoothing effect to the system, I was merely showing in a crude way that the battery is only needed for starting, perhaps I should have made that clear, Rick

 

[kbekl]

sod that i have had 90+ showing on my speedo (private road your honour) loaded with camping gear et al

2.7 td same as the Mav - not a TDi

paulp

oh i know what seed they will do but we are talking down a motorway cruising at 70 the way this one is geared means you are doing just under 3000 rpm which means the engine is working harder than it needs to i like 20+mpg on a 650 mile round trip tbh and at 70 would be 36 gallons of diesel and at 62 would be 26 gallons if not a little less

cost at 70 would be £187
cost at 62 would be £135


so would cost £50 to do an extra 8mph

my mk1 pajero was more economical and that was an auto lol

 

[rustic]

Yes you are correct the battery provides a smoothing effect to the system, I was merely showing in a crude way that the battery is only needed for starting, perhaps I should have made that clear, Rick

You are right they are simple, the earlier, the simpler.
Having watched scrap heap challenge where they take this engine, that gearbox etc, and build it into a runner is beyond me. They couldn't do that with the modern engine, If they miss out the wrong sensor, eg Ash tray full or other minor sensor, they won't start.

To start a diesel, you need warm air (blow lamp) fuel under gravity, hand crank and something to stall it, block off the air, or cut the fuel.
Who needs any electricity.
If ever there was an EMP (Elector magnetic pulse ie nuclear war or sun spot activity), think about how you would get around, ever y electronic item will be toast.:nenau

 

[kbekl]

You are right they are simple, the earlier, the simpler.
Having watched scrap heap challenge where they take this engine, that gearbox etc, and build it into a runner is beyond me. They couldn't do that with the modern engine, If they miss out the wrong sensor, eg Ash tray full or other minor sensor, they won't start.

To start a diesel, you need warm air (blow lamp) fuel under gravity, hand crank and something to stall it, block off the air, or cut the fuel.
Who needs any electricity.
If ever there was an EMP (Elector magnetic pulse ie nuclear war or sun spot activity), think about how you would get around, ever y electronic item will be toast.:nenau

right ok the argument aside what is good or bad about using the battery as a test implement

if the alternator is fully functional would the engine still run ??

 

[rustic]

right ok the argument aside what is good or bad about using the battery as a test implement

if the alternator is fully functional would the engine still run ??

You need a charged battery, when the engine is running, the battery voltage should rise to 13 volts then onto 14-14.5 Volts when the battery is fully charged, if the alternator is ok. Putting on headlights may drop the voltage on tickover but if you rev the voltage should increase.
Does that help?

 

[makeitfit]

I wonder if there was some underlying fault with the truck all the time. As those mpg figures and speed/revs are crap.
My beast with stupid big tyres etc and no thought for aero dynamics and my lead soled boots gives me 25mpg regardless. Hammer it all the time:naughty
PS just seen this thread "FIRE" just a thought http://www.nissan4x4ownersclub.com/forum/showthread.php?t=10120

 

[lacroupade]

I wonder if there was some underlying fault with the truck all the time. As those mpg figures and speed/revs are crap.
My beast with stupid big tyres etc and no thought for aero dynamics and my lead soled boots gives me 25mpg regardless. Hammer it all the time:naughty
PS just seen this thread "FIRE" just a thought http://www.nissan4x4ownersclub.com/forum/showthread.php?t=10120

I find myself agreeing totally with the monster raving looney that are Makeitfit...:doh

The Mav/Terrano is the optimum second hand 4x4 for its time.....especially in terms of price because anything that equals or beats it will have something wrong, guaranteed - or be a whole lot older.....