not strictly chat but.......

ruby bay · Posted: Sun Apr 05, 2009 5:57 pm Post subject: not strictly chat but.......

my loom is ready to connect to the bay electrics. the ford has one main power lead to the ecu, do i run this off the coil positive as well as the coil? will this lead also power me fuel pump? i didnt know where to put this so my apologies, any help appreciated. thanks mike.

ElusiveStranger · Posted: Sun Apr 05, 2009 11:29 pm Post subject:

A few more details might help.
(Petrol/diesel model of car/year)
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'78 Bay, 2 litre 091 box, EJ20 NA & the ashtray's on the 'right' side.
I don't lean forward for hills any more Grin

Bugger, missed out on "Live fast, die young"

ruby bay · Posted: Mon Apr 06, 2009 8:41 am Post subject:

oops! its a 1975 bay window. the loom is a 1990 sierra dohc and has one main power lead into the ecu, which ideally i would like to use off the ignition switch.
can i do away with my vw voltage regulator?the fords alternator has one inbuilt.
thanks, mike.

Alex (FTS) · Posted: Mon Apr 06, 2009 1:52 pm Post subject:

Yer you can definatly get rid of the voltage regulator but not sure about the rest-i have a ford dohc 1.8D in my van but I have an early model with no ecu.

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ruby bay · Posted: Mon Apr 06, 2009 4:56 pm Post subject:

to get rid of the regulator is it simply a case of cutting the wires going in and rejoining them like for like(+ to +, - to -)?.
the dohc uses an old style coil as well as an ecu, just worried that the draw from the coil, electric fuel pump and ecu may be too much for it. ive had a poke about with a tester and the vw coil lead seems the only switchable feed in there. i could wire in my own switch and put in a seperate feed, but would this not mess up the ecu, rebooting it at every start up? cheers, mike.

ElusiveStranger · Posted: Mon Apr 06, 2009 5:06 pm Post subject:

Dunno if your ECU's similar to my Scooby but here's what I did.

Wire up the ECU memory to a perm live.
Use a relay, switched via the IGN switch to power up the main relay (injectors, fans etc) and the ECU Power On supply.
When you turn off the IGN the ECU is still feed it's memory power & doesn't draw much current
_________________
The advice you receive on here is worth the paper it's written on.
Your experiences are worth shed loads to others, including the f'ups - live and learn.
Wouldn't YOU rather learn by someone else's mistakes? So would they.

'78 Bay, 2 litre 091 box, EJ20 NA & the ashtray's on the 'right' side.
I don't lean forward for hills any more Grin

Bugger, missed out on "Live fast, die young"

ruby bay · Posted: Tue Apr 07, 2009 10:02 pm Post subject:

thanks for that. ive been on the sierra websites and it is similar to yours. they are helping me with the ecu wiring. as a matter of curiousity/interest, the live wires to the vw coils(on the old vw loom), would these not already be relayed as they are ignition switched, i was hoping to connect these up to the ecus switched power. thanks, mike.

ElusiveStranger · Posted: Wed Apr 08, 2009 4:49 pm Post subject:

I used the coil wire for my relay, I don't think VW used a relay, mine certainly didn't (78 2 litre factory fit)
I went relay as I was switching 3 relays, prolly overkill. If you get one that's fused you instantly have another immobiliser Wink

_________________
The advice you receive on here is worth the paper it's written on.
Your experiences are worth shed loads to others, including the f'ups - live and learn.
Wouldn't YOU rather learn by someone else's mistakes? So would they.

'78 Bay, 2 litre 091 box, EJ20 NA & the ashtray's on the 'right' side.
I don't lean forward for hills any more Grin

Bugger, missed out on "Live fast, die young"

ruby bay · Posted: Thu Apr 09, 2009 3:49 am Post subject:

yes, one imobiliser mite help!! numpty question approaching, brace yourself..............
ive never fitted a relay, are these to power more powerful items using thicker wire from a thinner switch wire, ie a loom wire? cheers, mike.

ElusiveStranger · Posted: Thu Apr 09, 2009 5:59 pm Post subject:

ruby bay · Posted: Thu Apr 09, 2009 10:46 pm Post subject:

thanks for the help and the link, this could save a lot of wiring for me. cheers, mike.