Cranks but will not start intermittently

Ken,
I replaced fuel pump then cleaned fouled spark plugs and it started. But now my engine light is on and it does not Rev up as quickly as it used to(it seems to miss slightly if I push the throttle too quickly where as before I could rev up fast without the delay), but sounds smooth when rpm's are up.
?
Could an exhaustive leak around my manifold be having an affect?

Ken,
Spark plugs were gas fouled. Got new ones and it started. I guess it WAS the fuel pump. But then my plugs got fouled trying to start it.

Thanks for your replies.

Hello Ken,

I have a 2007 Nissan Pathfinder 4.0L,
Intermittent start issue, spins over but won’t start. I can remove the positive battery cable for 1 minute and then reinstall, and the vehicle will start right up.

What could this be?

I stopped and had the codes pulled today. The only code listed was a P0448 (EVAP) code. I don’t think that is the culprit though.

I will check out the PCM as per your suggestion.

Thanks!

Hello Ken,

I have a 2002 Pathfinder Ti and have intermittent start but only when the car is hot, Have had a new fuel pump put in plug fuel filter, new crank sensor and had new spark plugs put in but it is still doing it. I am about ready to trade it in

We just got a 2007 Nissan Pathfinder! And now we realized it intermittently starts! I can't believe this happened. We should have done our research more (sign). The mechanic said everything is new in the car, and has been replaced. We have the code of P0430. What could be the problem?

I'm having around about the same problem with my 1993 Hardbody with 2.4. The only difference is mine hasn't started in at least 5 months after draining has tank because had old gas in tank.