Help Weird charging issue! I need input plz
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Joined: Jan 2018
Posts: 4
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From: Rochester, ny
Weird charging issue! I need input plz
2007 G35x, K&N drop intakes and axleback.
Car was having starting issues, start and die or idle at 1000rpm and slowly rise on cold start. Went to the dealer and they could not figure it out. I have new throttle bodies and new MAFs, new battery. I have P0300 code and P0138 code.
Scan tool is reading 14v on start up and will rise to 17v during drive then starts to misfire and put my car into OL-fault (oxygen sensor voltage stagnant 2.275v upstream and 1.2v downstream). I put my meter on the battery and it's at 14.8 volts ??? Im confused now. Looked at IPDM, no burned fused, ecu connectors are good. I thought I may need a new alternator so I ordered one, now I'm not sure if it's that or the ECU? What regulates voltage? BTW if I drive too long my car goes into Safe-mode until voltage reaches about 15.5v at the ECU, stays running but cannot go over 5mph. At idle voltage decreases very slowly. I've looked at other posts but cannot find anything like this...ANYone??? Thank you
Car was having starting issues, start and die or idle at 1000rpm and slowly rise on cold start. Went to the dealer and they could not figure it out. I have new throttle bodies and new MAFs, new battery. I have P0300 code and P0138 code.
Scan tool is reading 14v on start up and will rise to 17v during drive then starts to misfire and put my car into OL-fault (oxygen sensor voltage stagnant 2.275v upstream and 1.2v downstream). I put my meter on the battery and it's at 14.8 volts ??? Im confused now. Looked at IPDM, no burned fused, ecu connectors are good. I thought I may need a new alternator so I ordered one, now I'm not sure if it's that or the ECU? What regulates voltage? BTW if I drive too long my car goes into Safe-mode until voltage reaches about 15.5v at the ECU, stays running but cannot go over 5mph. At idle voltage decreases very slowly. I've looked at other posts but cannot find anything like this...ANYone??? Thank you
Registered Member
Joined: Sep 2012
Posts: 1,638
Likes: 161
From: NJ
2007 G35x, K&N drop intakes and axleback.
Car was having starting issues, start and die or idle at 1000rpm and slowly rise on cold start. Went to the dealer and they could not figure it out. I have new throttle bodies and new MAFs, new battery. I have P0300 code and P0138 code.
Scan tool is reading 14v on start up and will rise to 17v during drive then starts to misfire and put my car into OL-fault (oxygen sensor voltage stagnant 2.275v upstream and 1.2v downstream). I put my meter on the battery and it's at 14.8 volts ??? Im confused now. Looked at IPDM, no burned fused, ecu connectors are good. I thought I may need a new alternator so I ordered one, now I'm not sure if it's that or the ECU? What regulates voltage? BTW if I drive too long my car goes into Safe-mode until voltage reaches about 15.5v at the ECU, stays running but cannot go over 5mph. At idle voltage decreases very slowly. I've looked at other posts but cannot find anything like this...ANYone??? Thank you
Car was having starting issues, start and die or idle at 1000rpm and slowly rise on cold start. Went to the dealer and they could not figure it out. I have new throttle bodies and new MAFs, new battery. I have P0300 code and P0138 code.
Scan tool is reading 14v on start up and will rise to 17v during drive then starts to misfire and put my car into OL-fault (oxygen sensor voltage stagnant 2.275v upstream and 1.2v downstream). I put my meter on the battery and it's at 14.8 volts ??? Im confused now. Looked at IPDM, no burned fused, ecu connectors are good. I thought I may need a new alternator so I ordered one, now I'm not sure if it's that or the ECU? What regulates voltage? BTW if I drive too long my car goes into Safe-mode until voltage reaches about 15.5v at the ECU, stays running but cannot go over 5mph. At idle voltage decreases very slowly. I've looked at other posts but cannot find anything like this...ANYone??? Thank you
Return to the dealer.
Tell them to just call you when they figure it out so you can return the loaner.
If you used any non OEM parts you may be paying for replacements.
Telcoman
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bgoodman
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Oct 26, 2019 11:46 AM