i have a 95 z28 and im kinda stumped. i was having problems with my car starting. the starter was going but it wouldnt turn over the moter. so i pull off the atlernater and batterie and got them tested they were fine. i put them back in and found the positive side termanal was stripped, so i think that it wasnt getting enough juice to the starter? but today when i was sitting at a red light my speedo freeked out and started going up and down while i was sitting still and the volt guage dropped to 10 from its normal 14. could it be the battery????

 

Since it sounds like it's not a problem that's constantly there I would start by checking your grounds.

 

so you think the grounds would have somthing to do with the spedo going crazy?

 

The speedo is controlled by the PCM, so it could have been a byproduct of shorting something out or some other electrical issue. The fact that your voltage dropped while the car was running is more what I was concerned about. If all the grounds check out you could have a short somewhere as well.

 

well like i said before the short can be coming from the positive side of the battery. it is a side mount termanal and its stripped so the bolt will back out, so mabey its arcing and creating the volt droppage and the speedo problems?