Well potentially

as alot of people know, since the engine swap I've had problems from time to time gettin the car started from cold, and recently idling low...then cutting out if left for too long

Today me & my branch manager may have finally realised whats wrong

I'm still running the Fiesta 1.3 battery!

we checked it with Excide (vehicle battery company) and the battery I need for the Escort engine is over 200 CCA (Cold Cranking Amps) more powerful

So basically My car is underpowered to run

then the HU, sub & amp are all draining more from the battery

So anyone thinkin of putting the likes of an escort engine into a fiesta, or something similar

REMEMBER TO CHANGE THE BATTERY TO SUIT THE ENGINE!

I thought standard batteries were the same.i thort a 12v battery was a 12v battery

Have you got the new battery in now then? Has it made a difference?

nah, its going in at the end of the month, skint already LMAO!

scoop, all batterys are different, sounds like you have solved the problem then meesh, i upgraded my battery about two months ago and my car starts first time every time, plus it made a difference to my sound system

Scoop, every car battery has a different CCA

the Fiesta one has about 350

the one for the Escort XR3 has just over 500

yes, they're all 12v, but the CCA are what get everything running and keep em runnin

Didn't know that. I often wondered why they ask in the shop before giving you it, even thought there are only two different popular connections.

Theres 8 different connection layouts

they're basically turnin the battery round to face the opposite way for each 2nd layout tho

Regardless of current situation, heres my views.

Yes the CCA rateing is different which would make the start crank at a slower rate, wtf has that got to do with the idle problems? None at all, so close but no cigar - and am tired and telling you whats up with it so maybe your branch manager can re-tell you that

Unfortunaty i second Dazza

What could it be then? is it carbed or injection? does it have ISCV

it could be a calling from the scrap yard lol, sorry meash, had to throw it in

sonomabitch