My car has been having a hard time lately. Often, when I slow down to a stop, the car dies. This usually occurs when the I throw in the clutch, but it has happened just driving as well. I changed my spark plugs to NGK Coppers after it started happening originally, but that didn't help/hurt at all. Any help or advice is greatly appreciated. I would just like to know what is causing it, because I have no idea and it is still not setting off my service engine light. Here are some possible ideas that I think might be affecting my cars performance:

1. Bad Alternator
2. Grounding Problem
3. Copper Spark Plugs
4. Dirty Throttle Body
5. Bad MAF
6. Bad Ignition Coils

Please help.

 

I dunno if the plugs would do it or not (if they are the correct heat range and gapped properly), but I could see a MAF sensor and/or bad coils doing that. It could also be a bad (or more than one) O2 sensor, but that might be more unlikely. I'd check the OBD2 anyway, just to see if there are any codes without the SES/CEL being one...

 

It sounds almost as if there is a fuel cut off. With the reputation the 2KMAF sensors have, I bet MAF sensor. I was having all sorts of drivability issues with no SES light and they all magically disappeared after I replaced the MAF!

 

2000 and up Maxima'a don't need the spark plugs to be check for a proper gap, because they come gapped properly.