Thread: Idle issues after master cyclinder install.

Hey everyone this is my first post on the forum lol I have had my 1993 nissan sentra for 30,000 miles now and this time i cant seem to get her running properly. I was changing my master cylinder with someone helping me about a month ago and during the process of bleeding the brake system some brake fluid had overflowed into the unhooked maf sensor. I cleaned it up with CRC sensor cleaner and when i ran the engine later that day it failed to hold idle, but however will run by giving it throttle continuously or by warming the engine up (by throttling it continuously) and allowing it to run with the MAf unplugged. After regrounding the sensor it continues to not hold idle and the engine continues to run much better with the sensor unplugged and will idle once warmed up with the sensor unplugged. As soon as i plug in the sensor, after being warmed up and idling by itself, she dies immediately. Any suggestions im really stuck with this one? Could the brake fluid leaking in the connector have done anything? Thanks everyone.

Hey man, I've moved your post to it's own thread so people can help you.

First thing you need to do is make sure your vaccum line that goes from the intake manifold to the master cylinder is connected right, and has no leaks. That would cause these issues as well.

def a vac leak somewhere that you forgot about or pulled on accident.

Please elaborate...do you possibly mean the brake booster? I don't know how a vac line runs from the intake manifold to the master cylinder. That doesn't make sense to me...I may not be thinking properly either though.

he meant brake booster, it's next to the flux capacitor

Yeah brake booster, sorry I'm drinking lol.

2.8 jigawatts!!!! Lol!!! I wasn't sure if maybe I was crazy, lol! I didn't think a vac line to the master was gonna make matters any better but I was gonna be hella willing to try to sort my idle issues!!! I'm at my wits end. Good luck guy!