Found-- Bad Ground Wire

[Lotus49]

OK i went out and got a new battery, plugged it in, within a few min the negative post was to hot to touch... so i must have a bad ground somewhere? How do i check for one.. is there an instrument for looking?

[jstbecauz]

If you need one I can get you a schematic, if you get me the year and make/model.

[Lotus49]

1994 z28 Lt1, auto

[89IROC&RS]

well for the negative battery cable, there should only be three connections, 1 to the block, 1 to the frame, and 1 to the body. you can trace those by hand till you get to them. no schematic required. if those are not loose, and dont look corroded or anything, remove all of them, including the connection to the battery, and test them for resistance. it should be very close to 0 ohms. if not, your cable has an internal break or damage somewhere, and is causing high reisitance, causing the heat build up.

[Chevyracincamaro]

now you know, and knowing is half the battle...

[Lotus49]

hey thanks.. as soon as i get home from work ill check ...actually i beleave i only have 2. One to the frame and the other to the engine block.

[Lotus49]

oh.. and what do i do next if i cant find any resistance. It sdounds like i have a major short somewhere, becasue along with the ignition, the injectors will fire inconsistantly.

[Chevyracincamaro]

check all of your grounds, but i would pay particular attention to the ground to the engine block. if you find that one of the ground cables has more resistance than it should, you are going to have to replace the cables...

[Lotus49]

Would that casue all the problems im having, no start, irrgeluar spark, irregluar injection fire, cant get into the OBD?

[Chevyracincamaro]

maybe, not sure. im wondering if maybe your ECU is fried...

[Lotus49]

ahhh fuck

[Chevyracincamaro]

my sentiments exactly...

[89IROC&RS]

that only having two ground cables could be the problem, but im not exactly sure. there might be a ground from the body to the engine to the battery or something.