ive heard to ground car in 3 different places. Ive moved battery to trunk and grounded starter to rail, where else should i ground the car. any help appreciated.
Well it's a unibody car so all you need is engine to body and battery to body. If you have solid mounts then all you need is batt to body.
You can never have enough grounds.
What you need to have is a good body ground!
Then you need to ground the body ( chassis ) to the motor.
Continuity to ground is the key!
I check all my grounds back to the battery using a ohm meter.
Poor ground have caused many headaches!
Just be aware that the factory engine to firewall ground is not enough to run the starter. So you need a large cable from the engine block to the frame just like the one from negative battery to frame in the back.
+1 to what ws27 mentioned!