[AlwaysInTrouble]

This has happened twice in one month. I start my car. It starts fine. I sit in Drive with my foot on the break and in less than a minute, the car shuts off. I start the car again. It starts just fine... and there are no problems after that. I will say that sometimes when I'm sitting in Drive with my foot on th break, after long enough I notice a vibrating feeling? Like under the hood... kinda sounds/feels like the bubbles feeling in a jacuzzi. What does that mean? I have a 2000 Infiniti I30. Do I need to let it warm up... what could the problem be and how much should I look to spend to fix it. I just had the radiator replaced.. (at least they said they replaced it.)

[TxGreaseMonkey]

1. Replace spark plugs with the exact make and number that came in the vehicle. My experience is that platinum plugs should be replaced at about half the recommended mileage.
2. Replace the fuel filter.
3. Hook a scan tool up to the Data Link Connector and check for any codes.
4. Drop and clean the transmission pan, replace the filter, and refill with synthetic ATF (e.g. Mobil 1 Synthetic Multi-Vehicle ATF or Amsoil Universal Synthetic ATF). The vibration and bubbles could be coming from an automatic transaxle that needs servicing. Looks like Amsoil's product meets Nissan's ATF specifications. You may need to call 1-800-ASK-MOBIL to verify the Mobil 1 product. My advice is to only use synthetics in your vehicle, if you plan on keeping it.

Keep me posted.

[kitch428]

This has happened twice in one month. I start my car. It starts fine. I sit in Drive with my foot on the break and in less than a minute, the car shuts off. I start the car again. It starts just fine...and there are no problems after that. I will say that sometimes when I'm sitting in Drive with my foot on th break, after long enough I notice a vibrating feeling? Like under the hood...kinda sounds/feels like the bubbles feeling in a jacuzzi. What does that mean? I have a 2000 Infiniti I30. Do I need to let it warm up...what could the problem be and how much should I look to spend to fix it. I just had the radiator replaced..(at least they said they replaced it.)

Since your radiator was just replaced, I suspect an air pocket in your cooling system not allowing coolant to reach your CTS (coolant temp sensor) which plays a large role in your EFI system. When cold, a vacuum is pulled on the coolant system and my be low until warm up gets thing flowing. Go back to who installed the rad and have it properly bleed again.