Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - Reply to Topic
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > Focus Tuning Chat > Alternator WOT switch?

Focus Tuning Chat Discuss performance tuning options for your Ford Focus.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Thread: Alternator WOT switch? Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
02-05-2014 07:45 PM
El Gato With regard to your 9/23 post about logging the generator duty cycle, I am currently looking at similar data. Most of the time it reads zeros, but spikes when anything increases load (headlights, power windows, applying brakes, etc). For me, we see the headlights pulse/dim a few times within a few seconds in parallel with the generator duty cycle. We've been troubleshooting alternator-related issues (new battery, new alternator, new connector soldered in). Did you ever get feedback about using the generator duty cycle as a tool for troubleshooting?
10-18-2012 12:27 AM
iminhell Got it solved.

You'll never guess what it was either.

OK. So I replaced the positive battery cable, improved the grounds and checked all the wiring. Same issue, though voltage was more stable. It still cut out WOT high RPM.
For some reason I played with the gauge cluster and ended up finding out somethings wrong with it. I swapped in the cluster from the other car and it works perfect. So the gauge cluster didn't dim anymore. The headlights still did though and logs showed a big voltage drop under the same conditions.

So today I'm going over what I can change in the tune and I come across something for the high speed fan under high load. I never noticed it before.
So I figure WTH, I'll adjust everything up and see what happens. High enough that it shouldn't kick in under heavy load ever.

And now voltage is good across the board. Weird.

I do think the alternator is a bit weak though. But this should prolong it somewhat.
09-23-2012 10:28 PM
bespurcell I have to agree with that^^. At idle the voltage regulator is only going to be able to do just so much.
09-23-2012 06:28 PM
badazz2010focus voltage regulator? LOL somethings you cant over ride I dont think.
09-23-2012 04:32 PM
iminhell These are voltage minimums:




It's very noticeable when it bottoms out. The dash lights dim a lot and a few times the headlights have turned off (Mach HID's).

I logged generator duty cycle last night but I've no clue if it shows anything useful. I had expected it to be a percentage much like injectors PW or fuel pump duty cycle, it wasn't. Most of the time it just read zeros. But near the times voltage was dropping it would register numbers; .3-.6 generally and only for a very short time. So I'm not sure if it even logs correctly.
Also the genDC and low voltage don't always correlate, actually the DC reads zeros more times than it registers working.

Here is the log (it's long, ~45 minutes) --> http://www.sendspace.com/file/2kvf2o
Here is the tune file --> http://www.sendspace.com/file/r4o7by
09-23-2012 10:38 AM
1turbofocus What happens ? Normal charging systems is 13.6 to 14.2 so if your holding a 13.8 to 13.9 then your right where you should be

Keep in mind your voltage is going to the Batt , at the Alt you may see it doing the 14.1 but at the batt ( Batt hooked up ) it will always be lower

Tom
09-22-2012 05:20 PM
iminhell
Alternator WOT switch?

Has anyone ever run into an issue where you can't disable the switch? (alternator cuts out at WOT even though you're commanding it to stay on)


Actually everything I tell the alternator to do isn't working quite right.
I'm telling the alternator to charge at 14.1 volts all the time. At idle with no accessories on it charges at 14 volts. When I turn the headlights on it drops to ~13.8-13.9 volts.
I replaced the wire from the alternator to the starter and from the starter to the battery the other day; larger gauge and known good wire/connectors. Voltage gained 0.1 volt from doing this; to where I'm at currently above.
The connector on the voltage regulator looks to be perfect. Wires aren't damaged or even stretched. Though it is the most likely culprit I can't find it to be bad.

Problems start around the 4,000 rpm mark, sometimes at part throttle and almost always at WOT.
I've adjusted the tune in various directions with no changes at all.

I'm curious if logging the alternator 'generator duty cycle' may shed any light on my issue? As in if it's near 100% most all the time the alternator is on the way out?

I'm at a loss here. Just tooteling around like a normal car everythings just fine. It's only when the car is pushed that this happens.

Posting Rules
You may post new threads
You may 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


All times are GMT -5. The time now is 08:24 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Audi S3, Ford Fusion and Acura TLX. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. Challenger Hellcat - Charger Hellcat