Ok, here's my problem. About 2 weeks ago, pulling out of Autozone, my car just dies. No sputter, like the sputter you get when you're out of gas, it just died. Since then, I have figured that it dies when the engine warms up. When its cold, it fires right up. If I have it at running temperature (170) for about 10 minutes then shut it off and try to crank it again, it will crank but won't fire.

Now, while I drive it, I can definitely feel a loss in power, and at idle it feels like it wants to die. And the worst part is, no SES light whatsoever!

So far, I have replaced the fuel pump w/ module, fuel filter, and fuel pressure regulator. Checked the fuel pressure with a gauge, all good. Checked the resistance in each injector with a multimeter, all good. Even unplugged each injector with the engine running, they all made it stumble a little. Removed MSD 6AL for the heck of it, no difference (it was my last mod). Changed out MSD coil for the stock one, nothing. Checked coil wire to the opti, it was all the way on but very close to the water pump (not sure if it could be arcing?). Also disconnected water pump temp sensor, again nothing. Battery is good, had it checked. Brand new alternator about a month ago.

I am pretty sure it's not the opti because I've had one go out on me before and know what it feels like. Money is not a problem, I just want my car to run again!

 

Check you ICM, If they get hot it will demonstrate what you have described.

 

Well, I just happened to have an extra ICM lying around (from previous troubleshooting ), so I popped that bad boy in. So far, I can see a difference! Smoother idle, and it didn't die at all. I drove it around for a good 20 minutes to warm up the engine, stopped and killed the engine a couple times then restarted it, fired up every time.

But it was raining today, so I'll see what happens when its a little warmer outside. But for now, I think my problems are solved! Thanks MEAN!