Help please, weak crank when starting
#1
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Help please, weak crank when starting
OK, so I was putting the finishing touches on my 2002 Mustang with an LSX/4L65E in it. So I went to go start her up.
Problem is, I have a very weak crank that won't last for more than a second or so. I did a voltage drop across the battery to the positive cable on the starter, and it has 14V (hooked up to jumper cables on a running car), but when I crank it it drops down to 7.9V. I figured bad starter drawing too much voltage, so I try the starter from my buddy's Silverado (5.3). Same thing.
I'm using a PSI stand alone harness. I have the crank signal for the starter connected directly to the crank signal wire coming out of the ignition switch.
I'm just kinda at a loss here. Maybe it's because it's 1 am and it something stupid I'm gonna find tomorrow, but I figured I'd come here to ask for some opinions.
Thanks, hopefully I posted enough info.
Problem is, I have a very weak crank that won't last for more than a second or so. I did a voltage drop across the battery to the positive cable on the starter, and it has 14V (hooked up to jumper cables on a running car), but when I crank it it drops down to 7.9V. I figured bad starter drawing too much voltage, so I try the starter from my buddy's Silverado (5.3). Same thing.
I'm using a PSI stand alone harness. I have the crank signal for the starter connected directly to the crank signal wire coming out of the ignition switch.
I'm just kinda at a loss here. Maybe it's because it's 1 am and it something stupid I'm gonna find tomorrow, but I figured I'd come here to ask for some opinions.
Thanks, hopefully I posted enough info.
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I have had a bad battery that even if you had jumper cables hooked up to it you still could not get it to start. I think it was a bad battery post. Also had grounding problem like stated above
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It was a brain fart on my part. I completely forgot to ground the motor to the chassis. I did that and it cranked right over. Something I should have known, but I'll attribute it to it being the middle of the night and me being exhausted, lol.
Thanks for the help, guys.
Thanks for the help, guys.