WOT voltage issue

Markus

Member
Feb 29, 2004
238
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germany
www.mustang1967.de
Hello guys,

my car run´s at wot too lean since 2 weeks or so.
Yesterday i logged the data with my tweecer rt and i saw that my voltage
dropped the higher the engine rpm is.

At idle with lights on 13.6 v
at 1500 rpm 13.5 v
at 2000 rpm 13.2 v
at 3000 rpm 13.2 v
at 4000 rpm 13 v
at 4500 rpm 12.8 v
at 5000 rpm 12.6 v
at 5500 rpm 12.5 v
at 6000 rpm 12 v

The alternator is a new 3G 130 ampere, the battery is a new optima red top.
Before the 3G i run a 2G with 70 ampere. No problem with my old one.
I think that the voltage is not enough for my 255l/h fuel pump and the injector offset vs voltage is not set right.
Is my alternator shot :shrug: or is that right :shrug:

do you have any ideas ?

thanks

Markus
 
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HISSIN50

"How long does it take to get help in here?
SN Certified Technician
Nov 29, 1999
31,179
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Take the alt in for a bench test.