2000 Transam Charging Issue
2000 Transam Charging Issue I have a charging system that I need some help with..... The car doesnt charge like it is supposed to. When I first start the car. It charges fine but once warm the gauge reads well below 13volts. What could cause this? I have replaced the alternator and the battery cables with no good results. My battery is an Red top optima and it is relocated in the trunk...It doesn't have any problems starting but the gauge reading worries me. Thanks
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Verdad Gallardo The voltage drops down to 10 volts...... Thats the problem because Im wondering if this is causing my fuel pressure issues! My two pumps are not keeping up and droping pressure when they shouldnt be! I figure if I fix the voltage issue it may solve my fuel issues if they are related!
Hmmm that is low.
The stock 100A alternator has like zero output at idle speeds. Have you considered moving to the 140A truck alternator upgrade? While it'll put out more, what's important to you is it puts out at lower RPM's.
The stock 100A alternator has like zero output at idle speeds. Have you considered moving to the 140A truck alternator upgrade? While it'll put out more, what's important to you is it puts out at lower RPM's.
This retains same bolt location as the ls alt? I read up on this a while ago and pushed it away in my brain. I had an itch there was a voltage to the pump issue if it wasn't a hose issue.
The larger truck alternator bolts & plugs right in. You will NOT be able to re-use the rear bracket that's used on the stock unit.
Unplug & push aside the single wire plug FIRST or you will break it.
Read through (all) this: https://ls1tech.com/forums/generatio...-failures.html
Unplug & push aside the single wire plug FIRST or you will break it.
Read through (all) this: https://ls1tech.com/forums/generatio...-failures.html
The larger truck alternator bolts & plugs right in. You will NOT be able to re-use the rear bracket that's used on the stock unit.
Unplug & push aside the single wire plug FIRST or you will break it.
Read through (all) this: https://ls1tech.com/forums/generatio...-failures.html
Unplug & push aside the single wire plug FIRST or you will break it.
Read through (all) this: https://ls1tech.com/forums/generatio...-failures.html
I'm still fighting a similar issue. The stock alternator dropped to 12.0 volts when warm. Replaced the alternator with a brand new acdelco 145a truck alternator. Problem still existed. Ran new power wires and ground wires, problem remained. Relocated battery to trunk and alternator to top passenger side with modular turbos kit, problem is better, but still there. Put overdrive pulley on the alternator and ran a resisted wire from the exciter pin out on the alt to a 12 v source... I'm still getting down to 13.0v when warm. The added loads should actually boost voltage output contrary to the info in this thread. Headlights on will bump my charging voltage .5 v at first but will also eventually drop to 13v. I've read the voltages with the gauge, logged them, and hooked a dvom directly to the alternator. Eventually I will figure it out, just haven't yet. Fwiw mitchel on demand spec states anything less then 13.5 v and the alternator is considered to not be charging.
I've also had no problems after upgrading to the bigger alternator. Plus I've added a 28 amp load with dual electric fans.
GM has always made vehicles with the bare minimum in parts. Oil cooler lines that all eventually leak. Manifold gaskets that rot away. Radiators barely capable for the application. Alternators that are just enough, but not more. If they used better and more reliable components that were just a bit more capable, their vehicles would be considered better than what's been the norm for many years: Toyota/Honda/Nissan etc. are better quality/designed/built than GM.
GM has always made vehicles with the bare minimum in parts. Oil cooler lines that all eventually leak. Manifold gaskets that rot away. Radiators barely capable for the application. Alternators that are just enough, but not more. If they used better and more reliable components that were just a bit more capable, their vehicles would be considered better than what's been the norm for many years: Toyota/Honda/Nissan etc. are better quality/designed/built than GM.
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1999 trans am ls1 dead battery I recently changed my alternator the reason being that my battery was always dead still same issue battery still dies car turns on with a jump or if i charge the battery but as soon as I turn off the car for a while it dies please help !!
Last edited by Juan Cisneros; May 1, 2017 at 03:20 AM. Reason: Adding some more stuff