wellz

I change the fuel pump fuel filter cam position sensor crank position sensor the spark plugs and the fuel pressure regulator it this won't start do someone have and answer for me im thinking the injectors may b the problem

bprice92

iTrader: (2)

Battery voltage okay?
Does it crank?

deloa84

iTrader: (5)

If judging by your profile, you have a 99 Maxima? One question. When you turn your ignition to the on position, is your "Security" light solid? Because if it is you have been immobilized by the NATS(Nissan Anti-Theft System). This problem is strictly specific to the 99 and it will stop your car from starting.

Basically (NATS in a nutshell) there is a ring around the ignition switch that checks a chip in your key. If they match up, your car starts fine. The problem with the 99 is every once in a while the module likes to "forget" which key turns on the car. It will happen at random and it literally thinks you are trying to steal your own car. It will cut fuel and inhibit spark until it has been reset by your Nissan dealer or a Lock master with the right tool.

Good Luck!

D.Stillwell

Not sure why you changed all those things out, fuel/sensors/plugs. Did you get any codes for those things? Did you get any codes at all?

What are the symptoms of the car not starting? Does it try to crank but just doesn't start, or is there no turning at all and no sounds? More info is needed. Bud either way, I'd look at starter/alternator/battery first in trying to diagnose a starting issue, not anything fuel related.

max ride 41

iTrader: (4)

i really think some people just throw money at a car w/o properly thinking it through. i bet he had a code or 2 and someone just told him to replace all that crap cause it could be part of the problem instead of searching in here.

RedSnap

Check your battery , starter , then alternator . First though check your battery cables. All those parts you replaced have nothing to do with turning the car over .