ecu alt control
10-31-2006, 10:06 AM
#2
1.0 BAR
Join Date: Apr 2006
Posts: 503
Re: ecu alt control
I find that hard to believe. The alternator's resistance is proportional to the current drawn from it. It works like a motor in reverse.
There is no way of engaging or disengaging it. Not electronically any how.
There is no way of engaging or disengaging it. Not electronically any how.
10-31-2006, 11:06 AM
#4
0.0 BAR
Join Date: May 2005
Posts: 0
Re: ecu alt control
Originally Posted by DrSeuss
I find that hard to believe. The alternator's resistance is proportional to the current drawn from it. It works like a motor in reverse.
There is no way of engaging or disengaging it. Not electronically any how.
There is no way of engaging or disengaging it. Not electronically any how.
Go read up on how alternators work then.
The output can vary depending on the field strength of the static coils. Those coils are energized by the battery providing more output, so yes the output of the alternator can be varied by the ecu.
You could probably google this and find out.
Stop disbelief and go research. :P
10-31-2006, 11:21 AM
#5
Guest
Posts: n/a
Re: ecu alt control
This may have nothing to do with the your question (what exactly are you trying to do?) but...
On my eg the alternator output would drop down to around 12.5V at idle unless the headlights were on. If they were on then it stayed at 14.4V. My car would sometimes stutter and even die at idle, until I figured out that if I kept my A/C switch on, it always outputs 14.4V and my car has never died at idle since. I don't have a/c, I just hooked a switch up to the ecu for FTL so it's not like I have a compressor running constantly.
On my eg the alternator output would drop down to around 12.5V at idle unless the headlights were on. If they were on then it stayed at 14.4V. My car would sometimes stutter and even die at idle, until I figured out that if I kept my A/C switch on, it always outputs 14.4V and my car has never died at idle since. I don't have a/c, I just hooked a switch up to the ecu for FTL so it's not like I have a compressor running constantly.
10-31-2006, 11:45 AM
#6
0.0 BAR
Join Date: May 2005
Posts: 0
Re: ecu alt control
Originally Posted by jagojon3
This may have nothing to do with the your question (what exactly are you trying to do?) but...
On my eg the alternator output would drop down to around 12.5V at idle unless the headlights were on. If they were on then it stayed at 14.4V. My car would sometimes stutter and even die at idle, until I figured out that if I kept my A/C switch on, it always outputs 14.4V and my car has never died at idle since. I don't have a/c, I just hooked a switch up to the ecu for FTL so it's not like I have a compressor running constantly.
On my eg the alternator output would drop down to around 12.5V at idle unless the headlights were on. If they were on then it stayed at 14.4V. My car would sometimes stutter and even die at idle, until I figured out that if I kept my A/C switch on, it always outputs 14.4V and my car has never died at idle since. I don't have a/c, I just hooked a switch up to the ecu for FTL so it's not like I have a compressor running constantly.
Do you by chance run Uberdata. I had major problems with this as well when I ran uberdata. The ecu would drop the alt control output when the ELD voltage was low. The low output voltage would cause the injectors to provide less fuel, thus causing a lean condition and stumbling at idle.
CROME has battery offset corrections for the injectors, but I haven't found the need to use them yet. 750's ran way better on CROME than on uber.
10-31-2006, 12:19 PM
#8
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Join Date: May 2005
Posts: 0
Re: ecu alt control
Originally Posted by Cray91
The old HFs had something like what you are talking about.
There is a script that someone made for crome too, but I haven't checked it out yet. Actually I think it is incorporated into the advance tables.
10-31-2006, 12:44 PM
#9
Guest
Posts: n/a
Re: ecu alt control
Originally Posted by MADMAX
Do you by chance run Uberdata. I had major problems with this as well when I ran uberdata. The ecu would drop the alt control output when the ELD voltage was low. The low output voltage would cause the injectors to provide less fuel, thus causing a lean condition and stumbling at idle.
CROME has battery offset corrections for the injectors, but I haven't found the need to use them yet. 750's ran way better on CROME than on uber.
10-31-2006, 01:53 PM
#10
0.0 BAR
Join Date: May 2005
Posts: 0
Re: ecu alt control
Originally Posted by jagojon3
I do, ------ Uberdata! I just run it because my car is tuned perfect, no need to change anything really. I tried disabling the ELD before and it didn't change anything. Keeping the a/c switch on completely eliminated the problem.
LOL, I did the same ----. Ya ELD disable doesn't work in UD.
Do you get the hesitation at around 10inHg too. That's because the O2 disable was coded really fucked up. It was done by bypassing some code with a jump. There is actually a byte option that can disable it. It modified my misc script to change the byte option not the jump around code crap.
