by spencerforhire » Fri Nov 20, 2015 8:38 pm
If that drop in voltage while trying to crank is measured at the battery with a meter, you may indeed have a bad battery. It looks like you're reading it on the gauge in the dash, so it may indicate that there's not enough current getting through the ignition switch. These cars have fusible links in the main 12 volt feed wires that connect to the battery at the large stud on the starter. Turn the ignition on inside the car and then jump the solenoid on the starter to see what happens. I guess that could be rather difficult depending upon what headers/manifolds are on the car.
edit: just re-read the whole thread; if it starts every time with a boost or charge, the battery is either bad or you have one heck of a big drain on it.
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....
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