2003 Nissan Maxima recently I changed the evap purge control valve solenoid and #5 cyl (misfiring)now i am getting a p1800 code i have checked the air intake solenoid and it is fine what else can cause that code. Could the evap canister vent be stuck open ? It is kinda making a whirly bird sound now and when it gets hot it just looses power and shuts down.:

 

p1800 is VIAS, not evap. It's irrelevant to your problem, but the solenoid may be bad or at least stuck (or unplugged).

 

Solenoid if it checks out then check fuse or the sensor

 

ok so what you are saying is it has to be that solenoid nothing else should cause it to error p1800 and that code has nothing to do with my evap system. I apologize i'm just a single mom trying to figure this out. Thank you for your tolerance to my ignorance. I appreciate any and all feed back.

 

Yes. It does not affect driveability at all. Ignore it.

Go into more detail of the other symptoms. Please define shut down, etc.

 

Click on this link and scroll down to post # 11, there is a photo with labels of the parts that make up the VIAS.

https://maxima.org/forums/5th-genera...cuit-open.html

 

could it be possible that the catalytic converters be clogged? (2003 with 250,000+ miles on it)

 

Depends. Will it accelerate hard when you first start it or does it just choke out? I'm surprised the engine isn't dead. Many don't make it past 150k from the precats.

And you deserve an award for searching lol

 

It acclerates hard always has.To answer your question about shutting down it seems that it only does that when the weather is humid and hot and i have less than a half a tank of gas
What next do you think?

 

MAF? To be clear, it just runs really bad?