Car won't start after shut off w/new battery

double check your grounds. they need to be there and up to par, to ground the starter (remember, juice flows from ground to positive). that would be my first check. good luck.

I'm with HISSIN, I can't think of anything else besides a bad ground. Did you remember to put your grounding strap back on the back of the drivers side head? you said you have new cables...you grounded your new neg. cable on the side of the timing cover, right? That's the stock location. The neg. cable also has a couple little wires coming off of it that ground to the engine bay/fenderwell...you hooked those up correct?

Try this: Take a pair of jumper cables, use the black side and connect one end to the neg. side of battery and the other end to your a/c bracket. Crank the car...does it start? I'd be willing to bet it will and that means less than enough ground to start the car, but enough to power the smaller things.

Good luck

1.) The main power ground is from engine block to battery: it is the power ground for the starter & alternator.

2.) The secondary power ground is between the back of the intake manifold and the driver's side firewall. It is often missing or loose. It supplies ground for the A/C compressor clutch and other electrical accessories such as the gauges. Any car that has a 3G alternator needs a 4 gauge ground wire running from the block to the chassis ground where the battery pigtail ground connects.

3.) The computer has its own dedicated power ground that comes off the ground pigtail on the battery ground wire. It uses a barrel type quick disconnect connector inline with the battery ground pigtail. Due to it's proximity to the battery, it may become corroded by acid fumes from the battery.

4.) The engine mounted sensors have a common separate ground. This includes the TPS, ACT, EGR, & BAP/MAP. These sensors share a black/white ground wire that connects to computer pin 46.

5.) The O2 sensor heaters have their own ground (HEGO ground) coming from the computer. This is different and separate from the O2 sensor ground. It comes out of the fuel injector harness near the EGR valve.

6.) The TFI module has 2 grounds: one for the foil shield around the wires and another for the module itself.

7.) The computer takes the shield ground for the TFI module and runs it from pin 20 to the chassis near the computer.

8.) The computer's main power ground (the one that comes from the battery ground wire) uses pins 40 & 60 for all the things it controls internally.

If you have access to a digital voltmeter and would like help diagnosing grounds, make another post and I will try to help.

Does the motor crank when you try to start it? Did you check your alternator?