97SS0594

i knew the title would get you in here!!
when my 94 TA sits for a few days and it rains it starts realy realy hard... im assuming its the coil. but what the wierd thing is, is that when im rolling it over, and let off the key so im not burning my starter up sometimes the car will like buck like it wants to start. well the other day it did this but i had a friend in the car rolling it over as i stood in the front of the car (jumper cables where hooked up) and i looked down at the alternator as it was bucking and it was spinning backward! i didnt think i was seeing it correctly so i had him roll it over again and sure enough when he let off the key it started spinning the opposite way imidiately! what will cause this? oh by the way the car always starts back up after a while.

96ZCamaro

Volt drop your cables. If they are over half a volt I beleive it is they are bad.

greenmachinedriver

if it is turning the correct direction while cranking and only spinning bacjwards a little when you sop this is normal if there is pressure in a cylinder when it is in the upstoke (compression stroke) the pressure will cause that piston to move back down causing the engine to spin backwards somthing like 1/4 turn.

mrmint69

Opti's hate moisture, so it could be your problem.

97SS0594

next time it does this ill get the camera out, its not like it just moves slightly backward it makes a couple revolutions

JP95ZM6

Did you drive over any really big bunjee cords lately?

Sounds impossible, but I believe you. So, here's one appropriately unlikely potential cause for this crazy symptom: If the exhaust was plugging intermittently (somehow) and you were building up a hundred+ PSI in the exhaust during cranking, could that stored energy then spin the engine backwards a couple revs after the starter disengages, like an air motor?

BTW, hooking a starter motor up backwards does not make it run the other way, so that's not it. Reversing the polarity on the stator coils only might, though.

WS6T3RROR

A faulty coil connection will also cause this, start by checking the coil wire at the opti.

97SS0594

this car is like a freak of nature i swear! i have 2 other lt1 Fbodies and have had LT1 cars since 01 and ive never seen anything like this! i realy wanna get some video of it!