Starting/electrical Issue

[EXEMPT]

Ok so I went down to the shops a couple of nights ago and parked up. Came out 15 minutes later and...

Disabled Immobiliser

Turned key to ACC to let fuel pump prime

Cranked over once with the standard worn starter motor crackle but she didn't fire up

After I cranked her, all the accessory lights that normally illuminate at ACC slowly faded to nothing and all electrics in the car were non-operational.

I thought the problem was with the battery (and still think it could be) so I tried jumping her with the clamps attached to the battery (normal jump start practice) but got nothing.

After about 10 minutes of connection to my mates VE SS with him giving a good rev every now and then, I got the dash lights on and got the car started.

Parked her up at home and didn't touch her until the following day when I noticed the immobiliser light flashing.

I turned the immobiliser off with the key and cranked her over and she fired up as normal (starter motor didn't even complain).

Then went for a short drive and came back and parked her up.

After two hours I went to fire her up again and as soon as i unlocked her she went completely dead again

Got my mates car connected again but this time I couldnt get her to crank with the battery connected. I had to disconnect the battery and jump her straight from the clamps and this worked instantly.

My problem now is that I don't know what is failing. I haven't known an 8 month battery to f**k up like this and be seemingly perfect sometimes and then dead other times.

I'm starting to think that my problem could be in the key barrell or with the immobiliser. Sometimes when I turn the key to accesories I'll here the pump struggle to prime (lower whine than normal) and then after a couple of seconds spring back to what could be described as the normal fuel pump whine.

Car's off to xpeed tomorrow but I'm wondering what I could be up for?

James

[Postmaster]

Check that there's a good earth to the negative side of your battery and to your motor, I had similar issues and ended up being a loose negative lead where it earthed out to the body if the car. Also make sure you have good contact on the terminals of your battery (little bit of boiling water and a wire brush). Make sure they are tight and free from corrosion. Hope this helps

[EXEMPT]

Check that there's a good earth to the negative side of your battery and to your motor, I had similar issues and ended up being a loose negative lead where it earthed out to the body if the car. Also make sure you have good contact on the terminals of your battery (little bit of boiling water and a wire brush). Make sure they are tight and free from corrosion. Hope this helps

Well yeah you were correct with everything man.

One earth wire was loose, battery clamps were corroded and the battery itself wasn't tied down.

Car now has none of the symtoms I first listed!

Cheers bro!