Voltage drops to 12.9 under load/high rpm - concern? voltage stabilzer any help?
#1
Voltage drops to 12.9 under load/high rpm - concern? voltage stabilzer any help?
while logging I see my volts drop from ~13.2 to 12.9 - usually higher rpm, I also have my 2nd fuel pump activated by boost.
1.) Concern for tuning?
2.) I see voltage stabilizers $20-$90 - anyone use this and see they work?
1.) Concern for tuning?
2.) I see voltage stabilizers $20-$90 - anyone use this and see they work?
#2
Your alternator may be on it's way to oblivion
With engine running, check if the voltage you see while scanning is the same at battery terminals (meassured with a voltmeter). Sometimes they don't match because PCM grounds are not good.
If they match, it is a concern. It may be your alternator going bad, a short or a bad ground.
If battery voltage is higher than the one you see in your datalog, check for PCM grounds or add a ground wire from battery (-) to PCM case.
With engine running, check if the voltage you see while scanning is the same at battery terminals (meassured with a voltmeter). Sometimes they don't match because PCM grounds are not good.
If they match, it is a concern. It may be your alternator going bad, a short or a bad ground.
If battery voltage is higher than the one you see in your datalog, check for PCM grounds or add a ground wire from battery (-) to PCM case.
#6
I have already cleaned all grounds and saw ~.50v increase under all driving but high rpm.
Hopefully after install, I'll see volts stay above 13 at all rpm's.
If not, and even so - I think I'll get a V booster for +70% TPS that can only help when it is really under full load.
I have a coil per cylinder and second fuel pump all pulling volts.
I'll post up results.