PassionFord      


Go Back   PassionFord > Main area > General Car Related Discussion.
Sign in using an external account
Register Forgot Password?
Search

General Car Related Discussion. To discuss anything that is related to cars and automotive technology that doesnt naturally fit into another forum catagory.
Sponsored by Cartown
Click Here

Welcome to Passion Ford!
Welcome to Passion Ford.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Passion Ford today!


Reply
 
 
 
submit to reddit
 
Thread Tools Search this Thread Display Modes
Old 08-12-2005, 07:54 PM   #1
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default Cossie ECU Voltage

With my engine running, my SECS monitor shows around 12.7V. I've confirmed this with a meter. Is this sufficient for the ECU, or should I have more (I gather that the ECU voltage has an effect on the fuelling).

I should also add that the voltage at the battery is 'only' 13.2-13.3V.

The voltage between the alternator casing and the output wire is a tad over 14V. Between the battery earth and the alternator output is the same, so I guess the earth is all good

Am I right in thinking that the only things that can cause this is bad wiring between the alternator and battery +ve, or the vehicle systems drain?

Am I making work for myself, or am I likely to have some kind of problem?

Any pointers would be ace!

Neil.
If you were logged in, you wouldn't be seeing this ad!
Register your free account today, or log in if you already have an account.
__________________
Neil S is offline   Reply With Quote
Old 08-12-2005, 09:07 PM   #2
Stu @ M Developments
PassionFords Creator


 
Stu @ M Developments's Avatar
 
Trader Score: (12)
Join Date: May 2003
Location: Blackpool, UK Destination: Rev limiter
Posts: 28,396
http://www.facebook.com/motorsport.developments
Default

Too Low IMO.
Wants to be battery voltage there really, but battery voltage should also be around the 14mark or at minimum 13.7 with electrics all off.

Look at teh battery "Fusible link tails" They look like 2 small crappy burnt out wires.... follow them 6" and learn that they are the main fusebox feeds!! Dead Common.
Stu @ M Developments is offline   Reply With Quote
Old 09-12-2005, 07:19 AM   #3
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Yeah, I had fun soldering new ones of those in last year!

I'll keep poking, see what I can find

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 01:53 PM   #4
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Does anybody else have any input on this?

How can the condition of the fusible links affect battery voltage?

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 01:54 PM   #5
Anonymous
Banned
 
Trader Score: (0)
Join Date: Dec 2002
Posts: 142
Default

Quote:
Originally Posted by Neil S
Does anybody else have any input on this?

How can the condition of the fusible links affect battery voltage?

Neil.
Cause the voltage is going up them before it gets to the ECU mate

Replace them with a proper bit of wire and a decent seperate huse holder located by the battery
Anonymous is offline   Reply With Quote
Old 09-12-2005, 05:03 PM   #6
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

I meant BATTERY voltage, i.e. measured at the battery

I can see that the fusible links are a likely cause of the drop to the ECU, thing is, this ECU voltage is only about 0.5V less than battery. I repaired them last year, but I'm thinking that your way might be a useful mod

I've run a jump lead from the alternator to the battery positive tonight, this didnt affect the voltage at all. I can't see how the battery voltage is so far down from the alternator voltage

The only way I can imagine it is that the rest of the vehicle electrics are dropping the voltage at the battery, or that the battery is poor...

Cheers for the input Chip

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 05:05 PM   #7
DaveEscos
BANNED
BANNED
 
Trader Score: (0)
Join Date: May 2003
Location: Mongsville, wiping Jimbo.'s spastic arse.
Posts: 23,050
Default

look at the alternator as well..


i think mines on its way out..

I have an optima top bollock battery and used to see 13.9's to 14's on my secs..

now im only getting 13.4's

trivial I know.. but i prefer it higher!
DaveEscos is offline   Reply With Quote
Old 09-12-2005, 05:06 PM   #8
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Alternator voltage is just over 14V Dave

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 05:07 PM   #9
DaveEscos
BANNED
BANNED
 
Trader Score: (0)
Join Date: May 2003
Location: Mongsville, wiping Jimbo.'s spastic arse.
Posts: 23,050
Default

oops, didnt see that
DaveEscos is offline   Reply With Quote
Old 09-12-2005, 05:10 PM   #10
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

No bother

At least you tried

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 05:41 PM   #11
Redkop
Member No: 39
 
Redkop's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: UK
Posts: 8,263
Send a message via MSN to Redkop
Default

Two recent threads

http://www.passionford.com/forum/vie...843&highlight=

http://www.passionford.com/forum/vie...888&highlight=
Redkop is offline   Reply With Quote
Old 09-12-2005, 06:44 PM   #12
Matt
PassionFord Post Whore!!
 
Trader Score: (0)
Join Date: May 2003
Location: Doncaster
Posts: 5,143
Send a message via MSN to Matt
Default

neil, not sure how relevant it is, and i know shit all about electrics before you ask but mine sees 14.1 at the ecu according to the secs monitor when its running so based on that fact alone....too low lol

stu, you'll be able to elaborate more on the ecu compensating the fuelling for voltage drop, mine went banana's with the old wiring loom, fuelling at idle was all over the place, voltage dropped a good 2 volts with all electrics on (fuse links smoked and burned out!!). only drops half a volt now since new loom and proper loom fuses. karl did tell me why having a stable voltage was soo much better but im fooked if i can remember his nev like techy waffle
__________________
Matt is offline   Reply With Quote
Old 09-12-2005, 06:52 PM   #13
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Thanks Lynne - I had read those earlier this week, and am currently in the process of measuring the current draw

Matt - I think I'm headed towards re-wiring as per Karl and Chip. Any idea what/where Karl did, or could you find out?

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 07:05 PM   #14
Matt
PassionFord Post Whore!!
 
Trader Score: (0)
Join Date: May 2003
Location: Doncaster
Posts: 5,143
Send a message via MSN to Matt
Default

ding made me a new loom, then karl mapped it again, problem solved lol
__________________
Matt is offline   Reply With Quote
Old 09-12-2005, 07:27 PM   #15
Smit
The 60ft Launch King
 
Smit's Avatar
 
Trader Score: (5)
Join Date: May 2003
Location: Ipswich, Suffolk
Posts: 23,620
Mark Smith Cunt Cunt Council Console Smittybear
Default

Neil - For the sake of money for a new loom/alternator i'm going to keep an eye on your thread
__________________
Smit. 340bhp 4x4 Moonstone Saff



Quarter Mile 12.621 @ 110mph. 0-60foot 1.631. 0-60mph 3.92secs. Datron timed, No Arse dyno here LOL

Motorsport Developments 01253 508400

PlayStation Network Username : SmittyBear
Smit is offline   Reply With Quote
Old 09-12-2005, 07:32 PM   #16
alan rainbow
I've found that life I needed.. It's HERE!!
 
alan rainbow's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: nottingham
Posts: 1,363
Default

http://www.passionford.com/forum/viewtopic.php?t=53903

take alook at this neil try the cable between alternator and battery mine was fooked and had the same problem and as stu says the links at the battery
__________________

tuned and mapped by www.norrismotorsport.co.uk
alan rainbow is offline   Reply With Quote
Old 09-12-2005, 09:07 PM   #17
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Alan - I was looking for that post earlier!

I posted on there at the time as I had recently replaced one of the fusible links.

This time, I will strip the fooker right back and replace them all.

Soldering the large cables is a right ballache Reading that post brings it all back!

After some fiddling, The residual current with everything off (doors closed etc) is about 40mA. Also I have 13.5V @ the battery at idle with no load. I'm happy with this for now.

Next step is to get the ECU voltage as close as possible to this.

Thanks all for taking the time to read the post and put some thought into it!

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 09:11 PM   #18
Matt
PassionFord Post Whore!!
 
Trader Score: (0)
Join Date: May 2003
Location: Doncaster
Posts: 5,143
Send a message via MSN to Matt
Default

this needs a post about fuelling voltage compensation!
__________________
Matt is offline   Reply With Quote
Old 09-12-2005, 09:13 PM   #19
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Agreed - I'd like to read the reason behind it!

Neil.
__________________
Neil S is offline   Reply With Quote
Old 09-12-2005, 09:14 PM   #20
Anonymous
Banned
 
Trader Score: (0)
Join Date: Dec 2002
Posts: 142
Default

Neil i can tell you what to do without a new loom, as long as its in good condition.

I have got 14.32 volts to the pump from an alternator creating 14.35

I aint posting ths though will tell you on msn.

So know what I am doing.
Anonymous is offline   Reply With Quote
Old 09-12-2005, 09:18 PM   #21
Fiecos Dan
PassionFord Post Whore!!
 
Fiecos Dan's Avatar
 
Trader Score: (0)
Join Date: Oct 2003
Location: S/E Kent, Thanet
Posts: 4,775
Dannycampion@hotmail.com
Default

steve's back.


at my ecu, With dingy's loom i run 0.1 volt lower than @ the alternator.

and run same voltage @ fuel pump.
__________________
07 Yamaha R1 race bike, and Fiecos still in bits. Only difference I'm a leg and arm down, thanks tractor...


Cossie 11.1@124mph & 0-60@3.04 - xr2tt 13.6@100mph
Fiecos Dan is offline   Reply With Quote
Old 11-12-2005, 03:37 PM   #22
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

OK, I'm pretty clear with how to get the ECU voltage up now thanks to Dingy

Whilst checking the rest of the lives, I found this:

Click the image to open in full size.

Click the image to open in full size.

This is the wiring to the 3 ABS relays, they supply the ABS valve block!

Must have been done before I got the car

Another job!!

Neil.
__________________
Neil S is offline   Reply With Quote
Old 11-12-2005, 03:58 PM   #23
GARETH T
Professional Waffler
 
GARETH T's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: barry-south wales
Posts: 30,946
Send a message via MSN to GARETH T
Default

Quote:
Originally Posted by Matt
this needs a post about fuelling voltage compensation!
as battery voltage drops, responce time of the injectors gets slower, so the ecu needs to allow for this! so one of calculations the ecu does too the fuel base figure is battery adder!

Click the image to open in full size.
__________________
Sadly don't drive anything worth showing here!
GARETH T is offline   Reply With Quote
Old 11-12-2005, 04:22 PM   #24
DazC
10K+ Poster!!
 
Trader Score: (1)
Join Date: May 2003
Location: Lancashire
Posts: 12,748
Send a message via MSN to DazC
Default

Battery Adder!? Is that an electric snake or something?
__________________

Air to air injectors for sale. See here.
DazC is offline   Reply With Quote
Old 11-12-2005, 04:29 PM   #25
GARETH T
Professional Waffler
 
GARETH T's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: barry-south wales
Posts: 30,946
Send a message via MSN to GARETH T
Default

DazC

__________________
Sadly don't drive anything worth showing here!
GARETH T is offline   Reply With Quote
Old 11-12-2005, 04:29 PM   #26
Fiecos Dan
PassionFord Post Whore!!
 
Fiecos Dan's Avatar
 
Trader Score: (0)
Join Date: Oct 2003
Location: S/E Kent, Thanet
Posts: 4,775
Dannycampion@hotmail.com
Default

Quote:
Originally Posted by GARETH T
Quote:
Originally Posted by Matt
this needs a post about fuelling voltage compensation!
as battery voltage drops, responce time of the injectors gets slower, so the ecu needs to allow for this! so one of calculations the ecu does too the fuel base figure is battery adder!

Click the image to open in full size.

Wot amount should the ecu be compensating?

i think wen mines runing with all the lights etc etc on, 13.4-6volts @ ecu, inj's and fuel pump.

wot % should the fulein be changed if voltage goes down to 12.5volts?
__________________
07 Yamaha R1 race bike, and Fiecos still in bits. Only difference I'm a leg and arm down, thanks tractor...


Cossie 11.1@124mph & 0-60@3.04 - xr2tt 13.6@100mph
Fiecos Dan is offline   Reply With Quote
Old 12-12-2005, 07:22 AM   #27
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Cool - Cheers Gareth

Neil.
__________________
Neil S is offline   Reply With Quote
Old 12-12-2005, 08:36 AM   #28
GARETH T
Professional Waffler
 
GARETH T's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: barry-south wales
Posts: 30,946
Send a message via MSN to GARETH T
Default

Quote:
Originally Posted by fiesta cossie
Quote:
Originally Posted by GARETH T
Quote:
Originally Posted by Matt
this needs a post about fuelling voltage compensation!
as battery voltage drops, responce time of the injectors gets slower, so the ecu needs to allow for this! so one of calculations the ecu does too the fuel base figure is battery adder!

Click the image to open in full size.

Wot amount should the ecu be compensating?

i think wen mines runing with all the lights etc etc on, 13.4-6volts @ ecu, inj's and fuel pump.

wot % should the fulein be changed if voltage goes down to 12.5volts?
im not sure how too work it back,, ive noticed on the secs ecu its 500 μs per volt
__________________
Sadly don't drive anything worth showing here!
GARETH T is offline   Reply With Quote
Old 12-12-2005, 09:01 AM   #29
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Not mega then?





Neil.
__________________
Neil S is offline   Reply With Quote
Old 12-12-2005, 09:21 AM   #30
GARETH T
Professional Waffler
 
GARETH T's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: barry-south wales
Posts: 30,946
Send a message via MSN to GARETH T
Default

Quote:
Originally Posted by Neil S
Not mega then?





Neil.
your so right aswell
__________________
Sadly don't drive anything worth showing here!
GARETH T is offline   Reply With Quote
Old 12-12-2005, 09:24 AM   #31
GARETH T
Professional Waffler
 
GARETH T's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: barry-south wales
Posts: 30,946
Send a message via MSN to GARETH T
Default

edited cos im a dick
__________________
Sadly don't drive anything worth showing here!
GARETH T is offline   Reply With Quote
Old 12-12-2005, 03:51 PM   #32
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

Edit it back cos now I look like the penis!

'We extend the injector duration by 500 mega seconds per volt, or 953 years, whichever is sooner'


Seriously though, just messing I always enjoy reading the techy stuff

Neil.
__________________
Neil S is offline   Reply With Quote
Old 12-12-2005, 10:38 PM   #33
GARETH T
Professional Waffler
 
GARETH T's Avatar
 
Trader Score: (0)
Join Date: May 2003
Location: barry-south wales
Posts: 30,946
Send a message via MSN to GARETH T
Default



i cant believe i wrote M for milli,,, what a cock,, only done electronics for 12 years
__________________
Sadly don't drive anything worth showing here!
GARETH T is offline   Reply With Quote
Old 16-12-2005, 05:18 PM   #34
Neil S
PassionFord Post Troll
 
Neil S's Avatar
 
Trader Score: (1)
Join Date: May 2003
Location: Cleveland
Posts: 2,813
Default

OK, I've replaced the fusible links and now have 13V at the ECU. Battery Voltage is around 13.2V, so it's a bit better now

What should the alternator output be ideally?

Mine is 14V, sometimes just under.

Cheers!

Neil.
__________________
Neil S is offline   Reply With Quote
Old 16-12-2005, 05:29 PM   #35
Fiecos Dan
PassionFord Post Whore!!
 
Fiecos Dan's Avatar
 
Trader Score: (0)
Join Date: Oct 2003
Location: S/E Kent, Thanet
Posts: 4,775
Dannycampion@hotmail.com
Default

i believe 13.8 - 14.0 @ any rev's over idle, and even with all lights & heater on.
__________________
07 Yamaha R1 race bike, and Fiecos still in bits. Only difference I'm a leg and arm down, thanks tractor...


Cossie 11.1@124mph & 0-60@3.04 - xr2tt 13.6@100mph
Fiecos Dan is offline   Reply With Quote
Old 08-01-2006, 05:53 PM   #36
trevCOSS
Advanced PassionFord User
 
trevCOSS's Avatar
 
Trader Score: (6)
Join Date: Apr 2004
Location: plymouth
Posts: 2,358
Send a message via MSN to trevCOSS
Default

neil I have exactly the same reading as you did to start with! exept if i load the electrics i see about a 2v drop in all readings, did your fuseable links look dead mine look ok but i still suspect they may be to blame, what did you replace them with?
__________________


My Cossie

Fat people love Cake
trevCOSS is offline   Reply With Quote
Old 08-01-2006, 06:05 PM   #37
SapphyMike
PassionFord Post Whore!!
 
Trader Score: (0)
Join Date: May 2003
Location: Sheffield
Posts: 9,156
Send a message via MSN to SapphyMike
Default

is it worth replacing my links to my battery while i have no engine in place? LOL
SapphyMike is offline   Reply With Quote
Old 08-01-2006, 06:35 PM   #38
pee vee
PassionFord Post Whore!!
 
pee vee's Avatar
 
Trader Score: (0)
Join Date: Jul 2004
Location: Wiltshire, Bath, chippenham area!
Posts: 7,411
Default

So these 'fuseable link tales'

are 2 wires coming off the battery to the fuse box??

sorry just adding things to my list of checks for my car
over the winter!!
__________________

Focus RS number 1215.
pee vee is offline   Reply With Quote
Old 08-01-2006, 08:06 PM   #39
SapphyMike
PassionFord Post Whore!!
 
Trader Score: (0)
Join Date: May 2003
Location: Sheffield
Posts: 9,156
Send a message via MSN to SapphyMike
Default

bump
SapphyMike is offline   Reply With Quote
Old 08-01-2006, 10:06 PM   #40
Fiecos Dan
PassionFord Post Whore!!
 
Fiecos Dan's Avatar
 
Trader Score: (0)
Join Date: Oct 2003
Location: S/E Kent, Thanet
Posts: 4,775
Dannycampion@hotmail.com
Default

Well check voltage drop.

i test voltage at

alternator (usually 0.2 volt higher than battery
battery,ecu feed and outputs, fuel pump, inj. (all these about the same with in 0.1 volt, except fuel pump wen connected)

if you get low readings on something, put a better + and earth to it.
__________________
07 Yamaha R1 race bike, and Fiecos still in bits. Only difference I'm a leg and arm down, thanks tractor...


Cossie 11.1@124mph & 0-60@3.04 - xr2tt 13.6@100mph
Fiecos Dan is offline   Reply With Quote
Old 08-01-2006, 10:06 PM
PassionFord
Ford Focus




Paid Advertisement


 
 
 
submit to reddit
Reply

Tags
cossie, drop, ecu, voltage

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump

Advertising - Terms of Service - Privacy Statement - JOBS



All times are GMT. The time now is 07:39 AM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.