986 S problem at idle, engine won't rev and shakes, battery disconnected

[Homeboy981]

May be a bad ground somewhere…possibly that "GPS device" that is not connected to the rest of the car's grounding system, huh? With the ground pulled, you should NOT STILL BE PULLING AMPS from your battery.

My factory stereo experienced similar problems when I replaced the HU and tried to use factory wiring, and original wiring was taken out in favor of wiring I KNEW WAS GROUNDED PROPERLY.

A dead battery or corroded battery posts, faulty ground circuitry, or a MAF about to croak ALL would be producing similar "spotty" problems. Your problem seems intermittent - it does NOT happen ALL the time. The guys have provided AWESOME and CORRECT troubleshooting information, given the responses you have provided.

It may be a job for an experienced mechanic to trace back some of your wires, replace the MAF, replace a faulty battery, clean posts or check the wiring. Batteries DO fail, even new ones. Insurance companies GPSs are made for the masses…how long has that thing been on there?

Your problems, as described, DO NOT seem to 'go by the book' of troubleshooting….unless some bit of information eludes us!

LOOK HARDER you will find a bad ground, visually check the MAF - clean it with MAF cleaner, clean the battery terminals (even IF you have a new battery there can still be crud on the posts-check it).

Your answer lies within. If not, there is no shame in going to the Indy (would not trust the dealer) and have him try 'specific' items, as described.

Good Luck!

[Gorthaur]

Homeboy... thank you!

Maybe there's something more. When I was about to reconnect the negative cable, I incidentally dropped the hexagonal nut which allows the end of the cable to embrace the battery pole. I tried to find it but I didn't make it, so I used another hexagonal nut which seemed to fit perfectly even though it had a different outer size. Perhaps the problem lies there, and since I went to the dep to buy the nut of the right size, this evening I'll be able to throw it in while reconnecting the battery. I will record a video as well and hopefully I'll show it to you.

[Gorthaur]

Originally Posted by Homeboy981

May be a bad ground somewhere…possibly that "GPS device" that is not connected to the rest of the car's grounding system, huh? With the ground pulled, you should NOT STILL BE PULLING AMPS from your battery.

The GPS device is not connected to the rest of the car's grounding system, as far as I know. Later I will post some pics.

Thanks!