Ok here is the problem. I replaced my lt1 with a new one and the car has been amazing. but now the car will stall at about the same distance every time. it will sit over night and i can drive about 14 miles and it will die instantly. No sputter no nothing it just shuts off. i parked it for the day and drove it home. it died as i pulled into the driveway. it has done this for 2 days in a row i drove around town for almost exactly the same distance and speed and it died. I replaced the fuel filter since i bought the car and that has been awhile and to be honest the day before this all started i was running it really hard. when it is running i runs just as great but just shuts off. I bought a new filter going to replace it here in a few minutes but was wondering if anyone had any other ideas just incase.

 

Have you checked for codes? Have you checked the fuel pressure?

Think of things that can "break down" when they heat up - IC Module, optical cam position module in the Opti, fuel pump.

You might want to add a "signature" with the basic info on your car - year, model, engine, trans and any major mods. Knowing that info helps people help you .

And let's move this to "LT1 Based Engine Tech".

 

Sorry about that I edited it for ya. I replaced the filter and I notice there is a really high pitched whine. I have replaced almost every component in the car it is a 95 Z28 LT1 engine has 2900 miles tranny is at 5800 miles. The whine goes away when I rev the engine and almost immediately comes back on when I let off. It is the first time hearing the noise. I know what the fuel pump sounds like it comes on to prime during start up. This is almost like the fuel pump is straining if i was to guess. The last time it died the whining was going on and off several times. I am going to jump the relay and see if it is the pump dying when it starts to warm up. I have over 1/2 a tank of gas so I know I have fuel. I just ran into this problem a couple of days ago. I went to the auto parts store here and they didn't carry a fuel pressure tester or OBD I w/ OBD II connector in stock I have to run to another store tomorrow when I get a chance I will post the readings when I get them. The car runs like a champ but will shut off as soon as get the same distance every time it is the weirdest thing ever.

 

There is a connector near the PCM that allows you to bypass the fuel pump relay and the PCM interface:

Courtesy of Shoebox:

http://shbox.com/1/fuel_pump_prime.jpg

 

Ok here is a new twist to the problem (by the way I order fuel pressure tester and I am going to order a obd reader) I drove the car the other day to see if it was the fuel filter. I drove the car and it died at the exact same spot as it did before. I let it set for a couple of hours and drove it home and it died pulling into the drive way. basically I would assume I can go 8.5 miles and it will die. I dont think it would be a fuel problem since there is no hesitation and the car shuts off. None of the lights come on and I checked no security light I built a permanent bypass for the VATS system. I know the bulb is good I just replaced my dash and all the lights before the engine replacement. I am getting frustrated and I am running out of parts to replace. But I am starting to think its in the ignition system but everything in that is less then a year old. The SES did come on when it shutdown but I have to save to buy one. The other question I have can I use the Actron CP9145 on my car The manual says I can It is a OBD I with a OBD II connector. It comes with that cable so I thought I should be able to use it out of the box as it comes.