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"-
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
03 Silverado 2WD ex.cab (work truck/parts hauler)
04 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
93 Suburban- 350/4L60(retired)
00 Saturn SW2- wife's car
01 Saturn SC2- younger son's project
00 Saturn SL2- daughter's car
98 Saturn SW2- spare
and 3 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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