Electrical Problems maybe ECU PLEASE HELP???

[shadowdrag]

I did all I can to search for a similar problem and nothing comes close.

Here is the problem:
My car will run fine until it reaches its normal running temperature. When I accelerate my car, my in-dash warning Brake and Battery lights will flicker on and off. But if I just drive it normally nothing comes on. I already did my Alternator 2 months ago and I just replace my battery three days ago when this started happening.

I checked the alternator harness and it is clipped in tightly, there's no sway bar in my car, so positive batt. terminal is not touching.

After an hour or so of driving, my SAFC2 gets pretty warm. Is this normal?

I do notice that when I do give it a hard acceleration, those lights comes on and flickers and stays on for a while and turns off," only happens at normal temp". When it turns on, SACF2 indicates that Voltage surges from 13.7V to 14.7V and goes back when lights turn off. At the same time boost gauge Vacuum goes from 20 to 15 psi.

Please help anyone, I am so frustrated.

 

[Splitpi]

Did you fool around with your grounding leads at all when replacing the altenator and or battery? Also check with a multimeter (~$14) that you are getting roughtly 12 volts with the car off and about 14 volts with motor running. You could be over juicing the system, but perhaps you have a bad ground and the vibration from accellerating is causing some shorts. Its possible, just not probable, but easy to verify anyways.

 

[shadowdrag]

Did you fool around with your grounding leads at all when replacing the altenator and or battery? Also check with a multimeter (~$14) that you are getting roughtly 12 volts with the car off and about 14 volts with motor running. You could be over juicing the system, but perhaps you have a bad ground and the vibration from accellerating is causing some shorts. Its possible, just not probable, but easy to verify anyways.

No, I just bolt them back up the way it came off. They both are measure fine, 14+V alt. and batt when motor is on and 12V when off.

But this will only happen when the car is ran for like, say 30+min. In the morning, I can drive it hard and nothing comes on.

I hope this won't screw up my car.

I just don't know where to start.

Thanks,
jerry

 

[shadowdrag]

Did anyone out there had a similar problem to mine and have a solution?

Thanks