tallendorf

I finally changed the plugs on my 02 3.5 Altima a little late, 140K. I disconnected the battery to reset the computer. Fixed an oil leak, changed hoses & cleaned some of the gunk out of the intake collector while it was off the car. I got everything put back together with the exception of the plastic tubes between the MAS and the intake collector. I started the car and the service engine light illuminated immediately. I left the car running to bring it up to temp so I could top off the radiator, make sure oil leak was fixed & listen for air leaks around the Intake. Shut the car off, disconnected the battery again. I hooked up the plastic tubes & reconnected the battery. Started the car up again and the Service Engine light again came on. I ran the car up to AutoZone to get the codes and find out its 1102. The MAS open or bad. I pulled the MAS spayed it down with Gumout. I used light compressed air to dry it, and left it sitting for a while. Cleared the codes manually, thanks to the directions on the forum, and drove the car again. It didn’t feel right, but the Service Engine light remained off. Well again today the light is back on.
My question here is what the heck could have caused the MAS to go out? Could there be anything I’ve overlooked or worth checking or is it just time to belly up to the Nissan Counter.

revoltrise

if the intake tube was off with the engine running, the MAF code was set because the MAF wasn't reading the air going into the engine, and the output was too low. Cleaning it with gumout likely ruined the electrical contacts inside of the MAF and it will need to be replaced if that is the case. Try clearing the codes again, double check for vacuum leaks, and let it run for a while at idle. if it doesn't clear up it may be worth having your nearest dealer diag. it, they can use consultII to check the MAF output...

tallendorf

Thanks for the info. I pulled the MAF housing back off tonight and cleaned it with CRC MAF cleaner. Put it all back together, and started it and checked the code. This time the Err code was 0507. I checked the code and its idle to high. I went ahead and cleared the code again and I’ll continue to drive the car until the Service light appears again. I’ll recheck the code at that point, and post any results. Thanks again for the help!

tallendorf

Well the light is back on, but now it appears that the MAF code is clear, at least for the moment. The code is again 0507, so I will be searching for an air leak this weekend. Would anyone happen to know what the torque spec is on the intake? I originally torqued it to 25Ft lbs. Thanks!