JSeaman

I recently purchased a Fisher Fury with a stage 3+ Cosworth engine and it is a very quick car! I did notice yesterday that it is only hitting 1 bar of boost though and traced this to the Amal valve boost solenoid thingy.

It seems the valve expects a +12V and a switched GND from pin 16 of the ECU. The good news is the valve works and the ECU is doing it's bit too. The bad news is my 12V is missing (the easiest fix thankfully).

I don't know Cossies particularly well so I'm not sure how close to a stock set up the wiring is. The wires to the Amal valve are obviously aftermarket but it quickly feeds into what I think is probably stock:



Brown/yellow = pin 16 of the ECU and black/red should be 12V I guess

This little loom goes across the fuel rail and joins the main loom where I can't trace anything without ripping out all sorts of wiring which I'd like to avoid



My questions are twofold:

1. Does anyone know in simple terms where the +12V comes from and if it is shared amongst many other components

2. Can I just steal pin 1 here :



I don't have a feel for the current draw of the valve

Thanks in advance

James

Turbosystems

iTrader: (5)

fuel pump relay pin 87 of the standard cosworth engine loom

this link will help you out www.bigturbo.co.uk

JSeaman

Many thanks for the response - I've got a twin fuel pump scavenge system on there so guess the wiring is all new - I'll try and locate the relay but I don't have the luxury of stock fusebox etc. Is there anything else that would fail on the stock car if this relay failed

Turbosystems

iTrader: (5)

The fuel pump and injector relay are part of the cosworth engine loom which is a separate item to the sierra main car loom
have you looked at the link I posted alot of what you need to know is there

The fuel pump relay only feeds battery voltage to the fuel pump, idle air valve and amal valve

martysmartie

iTrader: (1)

Yes, it woulden't run!

As said, the supply comes from the fuel pump relay, as does the ISCV, that relay is behind the dash (Passenger side)

If you 'steal' the ISCV feed that will no longer work.

Martin

Turbosystems

iTrader: (5)

Thats how they are std just further back in the loom

JSeaman

Thanks guys, I found there was a massive healthy switched live for the fuel pump which was easily accessible so hooked this up to the valve and it switches as it should. That's the good news, the bad news is that there's no more boost.

The car's supposed to be 1.7 bar capable but I'm spiking to 1.2 at best, hmmm

Turbosystems

iTrader: (5)

check what restrictors are in the amal valve ports and check it is pipe correctly

JSeaman

It's plumbed to wastegate and turbo but free air for the third feed

I was told by the seller (who I trust) that it was set up by Norris motorsport (also trustworthy) at 1.7 bar so there's something odd going on.

I get clear clicks when I put the ignition on so everything looks good from that side

martysmartie

iTrader: (1)

It should have made some difference when the Amal was connected?

The third connection is fine, that is the 'atmosphere' connection, originally this would have gone back to the airbox, but when inductions cones are fitted this is removed.

Other than that perhaps you have a bad actuator etc?

Martin

JSeaman

That's what I thought!

Figured the atmospheric connection was OK. Induction kit is indeed present rather than the stock air box

I can hear it clicking and, assuming it's like a standard boost solenoid, that pretty much is all it does. The only thing I'm left with is assuming the ECU is actuating it at 1 bar, don't suppose there is an easy way of finding that out though

Does anyone keep a spare stock of Amal valves that they'd be happy to send over if I cover postage or is that not something you guys do?