built04SS Posted October 13, 2013 Author Report Share Posted October 13, 2013 Yeah I have a scan tool but have to wait till next week when I put my trans in so I don't throw anymore codes... could you possibly text me so we can talk during the process instead of the site lol Quote Link to comment Share on other sites More sharing options...
highvoltamps Posted October 13, 2013 Report Share Posted October 13, 2013 (edited) Yeah I have a scan tool but have to wait till next week when I put my trans in so I don't throw anymore codes... could you possibly text me so we can talk during the process instead of the site lol Yeah, we can do that. But first, give me any details that can help with troubleshooting. Is your original alternator a Delphi AD230 and the upgrade an AD244? How's the belt tension, a little tight? Are there four pins inside the alternator connector? I think I know what's going on, the power coating of your alternator housing.. Pop off the back cover and you'll see two brush clips to the left of the wire connection. The top goes to the voltage regulator and the bottom to ground. If that bottom clip isn't getting a good ground your alternator with not work correctly. That brush is controlled by the regulator to turn your alternator on. If your not sure what I'm talking about, take some pics and we'll go from there. Edited October 14, 2013 by highvoltamps (see edit history) Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 Well I've put 4 alternators on it last week and its still going in limp mode.... I've cleaned allllll the powder coating off the necessary areas on the bracket and put a non powdercoated alternator on it ... I'll look at the pin and all that tomorrow but it is a 4 pin alternator Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 And the original alternator was a 105 amp and the new one is a 145 Quote Link to comment Share on other sites More sharing options...
highvoltamps Posted October 14, 2013 Report Share Posted October 14, 2013 Check your pins inside the wiring connector for any corrosion. Use a temporary wire jumper from one of the alternator mounts to a good grounding point so we know it's getting properly grounded. Also what all do you have not connected right now? The body, powertrain and the output driver modules have to be connected. A scan would be helpful for futher troubleshooting, sounds like there's an issue with the control signals from the pcm or your new alternators regulator. Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 I have the transmission out right now getting the torque converter tightened up Quote Link to comment Share on other sites More sharing options...
highvoltamps Posted October 14, 2013 Report Share Posted October 14, 2013 Where did you get this alternator? Do you have a model number? Or take a pic with the back cover off. Have you tried to put the 105 amp back on to see if the problem goes away.. Can you give me a detailed description of what exactly happens with the new alternator? I can help you out but I need the details so I can pin point the problem. I'll have a little time later on to text you through the troubleshooting but for now the info would be a good start. Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 I work at a Chevrolet dealership and put 2 new factory 105 amps on it and 2 new 145 amp alternators on it and if you plug them up and crank the truck up it will run for about 30 seconds or so and go into reduced engine mode but instead of running like crap it just shuts the whole truck off and will not start back up unless you reset the computer and it only does it when the alternator is hooked up but if you unhook it it will run off of battery all day until the battery dies Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 I'll have to get the model numbers later today but I know its not the alternator causing it BC I've put several on it Quote Link to comment Share on other sites More sharing options...
highvoltamps Posted October 14, 2013 Report Share Posted October 14, 2013 That sounds like the PCM is detecting a low/high voltage or a fault. You need to charge your battery to at least 70% capacity and put a scan tool on it. Let me know what codes are thrown.. Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 Yeah I'm thinking it is the battery causing it ... I'm going to buy a new one this weekonce I get the trans back in it Quote Link to comment Share on other sites More sharing options...
highvoltamps Posted October 14, 2013 Report Share Posted October 14, 2013 Right on, let me know how you made out Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 14, 2013 Author Report Share Posted October 14, 2013 Will do man appricate it Quote Link to comment Share on other sites More sharing options...
built04SS Posted October 22, 2013 Author Report Share Posted October 22, 2013 Well guys I put the transmission back in tonight and swaped out the optima battery for a new one and BAM problem solved! Its always the easiest little problems that whoop you the most lol Quote Link to comment Share on other sites More sharing options...
Cramer Posted October 22, 2013 Report Share Posted October 22, 2013 Quote Link to comment Share on other sites More sharing options...
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