what a difference

[cossiemetro]

a 100 amp fuse could make my car is running sweet even the rev counter is working properly YEEHAA!!! ITS A DIFFERENT CAR its AWSOME now no jerkyness(is that a word)
it idles perfectly and is even more responsive it must have been ifie for a while as its
mind blowing fun now just done 125 miles just for the fun
this is all i've done now to make changing the 100amp fuse easier to change cost £30 and an hour of your time by the way its sitting on foam and nowhere near the belts/pulleys

[jensena]

Nice neat looking job Cossie, and a good idea too. Where do the wires connect to? I think I might do this on mine.

[cooky]

superb idea mate...nice one

[mad mark]

Where are the 100amp fuses located on a 4.2, is it the same place as a 4.5??
I'm assuming you've repositioned it!!

[cossiemetro]

mark that is the 100 amp fuse i've made a new cable from the alternator and lengthened the the battery feeder to the front no more cut arms and fiddly nuts to worry about
and i'm sure the gold connections are 10 times better than the originals

[2DOGS]

Not wishing to doubt, but surely a fuse is just a piece of resistive wire so I don't understand how this can affect idling and jerkyness. If it does work though I'd like to give it a go 'cos mine suffers from those symptoms - I'd always put it down to petrol quality.

[alinton]

Its not even a resistive piece of wire, a fuse has no resistance. A fuse is a piece of wire, or metal, which can carry a certain current.
If this current is exceeded the wire or metal strip will heat up and melt, thus breaking the contact.

In the 'Big Fuse' the current it can carry is up to 100 Amps. After which it is designed to get hot and fracture.

So a fuse is either conducting, or it ain't. So I really don't understand how many Cerb faults are attributed to the fuse.

Unless someone can enlighten me?!

Andy.

[nelly1]

alinton said:

Unless someone can enlighten me?!

Look at it this way.....all the current for all the electrics on the car goes through that fuse; ECU power, engine electrics, gauges, wipers, et al!

Now, if that fuse has a dodgy connection, then the voltage will drop to the systems connected to it.

Hence rough running as the ECU struggles to read signals from and send instructions to the engine as its supply voltage varies all over the shop.

And so on with a myriad of other assorted electrical gremlims......

Edited by nelly1 on Sunday 24th September 17:41

[Extra 300 Driver]

alinton said:

In the 'Big Fuse' the current it can carry is up to 100 Amps. After which it is designed to get hot and fracture.

The fuse will take about 200 amps in a short burst, this is why 100amp circuit breakers dont work too well, as they blow at 100A

[Neil P]

I agree with nelly1 a fuse or wire is only as good as its termination point or connection. Dirt,grime and corrosion will affect the everyday running.

[cossiemetro]

thats why i've gone for the gold bling and m8 not m5 fixings and i'm using a 125 amp fuse
as i said the cars is so much better £30 well spent .......