02 Montana Stalling Issue

[pontiac_dreamer]

Since winter of last year my Pontiac montana has been having this stalling issue. first I though it had to deal with the cold because of the time it started at the time we having -20 degree weather. now that its warmer its still having this issue. When it stalls the RMP's shift up and down sporadically, the car sputters and its dings 3 times and it dies, and I would have to let it sit for 45 mins to an hour before it starts again. it threw a p401 for my check engine. but now it doesn't come on first I got the erg cleared still having the issue, then the battery changed, then the fuel pump, fuel filter fuel wires (I think that what they're called) replaced. got all the sensors checked out, all the fuses changed out and it still is stalling. I don't have much money to fix it but im trying to hold on to my van. any help would be great

Also not for sure if this is relevant but when I changed the battery my ABS light came on my 3rd row windows stopped working and so has my power locks

 

[Steelcity]

wow I don't know where to start or what to tell but you may have to take back to shop or worse a dealer, they have the proper diagnostic tools to trouble shoot and perhaps you may have more than 1 problem. maybe someone else may chime in with some advice. Very strange that by changing out the battery it sets off the abs code and windows don't work and power locks ? Maybe its some kind of electrical issue ? Bad ground? Bad bcm? Its all guesses and that's why you need a scan tool. Good luck keep us posted cause this is a weird one that I would like to know what fixes it.

 

[melsg5]

The P0401 code is the EGR, http://www.obd-codes.com/p0401 , when you had the EGR cleaned was the check engine light cleared? Have you had the throttle body and idle air control valve cleaned/checked?

 

[sergeimoskva]

Hi !
Code p0401 is for incorrect flow . There is a tube that goes to EGR , that tube is exhaust. If something is clogged, it would be clogged with carbon. You'll need a high powered solvent. Something that is safe for the engine. Throttle plate cleaner will do, but there are better products out there.first spray the visible carbon, let soak and soften. you should be able to eventually poke through it then clean really well with pipe cleaners, keep using your solvent though, you do not want to knock chunks of carbon into the intake, they'll get sucked into the engine and may cause engine damage. It may be better to remove intake altogether, easier to clean and less chance of damaging the engine.