Intermittent stalling issues

Heyman, thank you very much for taking the time to answer my question. I hope that the problem is a clogged PCV valve which would be an easy fix. If not I will try to find out if there is a vacuum leak somewhere in the engine compartment. The air filter was replaced so I know that this is not the problem.

I will send you a message again after I change out the PCV valve.

Again, thanks for your expertise!

Bill P.

Dear Expertise Staff:

I replaced the PCV valve (which was no good) and did a check, but did not find any vacuum leaks, unfortunately my stalling problems on my Nissan Maxima continue. Any other suggestions would be greatly appreciated. Remember when the PCM is accessed no service codes are presented.

Thank you,

Pisaki

Good Morning Heyman and Ken,

This Maxima has an automatic transmission and it tends to stall after it is fully warmed up and have been driving it around for awhile. It does not shutter when it shuts off, just rpm's heading to zero when slowing down for a stop sign or just waiting on a red light to go green. Sometimes the car feels like it is struggling while I am driving at low speeds in city traffic and then I know that it is going to stall out soon. The fuel filter was changed at 60,000 miles but that was about five years ago, do you still believe that this could be the culprit or needs to be changed?

One last clue that I do not know means anything. The problem began right after there was a strong smell of gasoline after filling up the vehicle last December. This smell tends to come back after filling up the tank although not as bad as the first time. The first mechanic that I took it to thought that I just got some bad gas so I put some dry gas in and ran the tank nearly empty before filling up again. Bringing it back to him later that month he then thought it was something else and began changing out some sensors, etc, even though the check engine light has never come on and accessing the PCM still shows no codes (0505). The only other thing that I can think of is the car has been kind of loud for the past five years or so but has no problem passing the annual state inspection and no mechanic has suggested that I get this fixed.

Thank you both again for all the advise that you are giving me because I am hoping that I can resolve it on my own now because I have put so much money into it and the problem still remains the same.

Take care,

Pisaki

Heyman and Ken,

Thanks again to both of you for your needed input. I will try a new fuel filter along with the Seafoam additive, you are right at this point it would be a cheap fix if it has a shot to work. Not sure what Seafoam does but I did see it at a AutoZone awhile back.

This Maxima has two crankshaft sensors unfortunately so I guess that I would have to replace both of them. According to my Haynes manual it states that a p0407 and a p0905 code would flash if there was a problem when I access my PCM. Again when I do access it no problems or codes come up. Would there be any way of checking them so that I would know if either one of them were defective? Neither of you think that it could be the EGR valve correct?

I will keep in touch with my progress in solving this perplexing problem.

Take care,

Pisaki

Hi Ken,

Thanks for sending me those image details on how to locate both crankshaft position sensors on my Maxima, I really do appreciate it. Also, your link to the replacement video was very helpful because of the tips that I never would have thought of. The parts are not that expensive so I decided to order both of them and hopefully I will not have too much trouble with getting access to where they are located.

I will let you know at a later date how the installation went and how effective they were in solving my stalling issues.

Take care,

Pisaki