Hello my name is XXXXX XXXXX thank you for your question.
Who replaced the Master cylinder for you? Dealer? or repair shop?
Also, you have ABS correct?
Who did the master cylinder replacement?
Repair shop? or Dealer?
My mechanic, but used nissan part. Replaced it twice thinking it may have been a faulty part.
No, it's not faulty. What is the issue is the brake are not bleed properly
Let me explain
When equip with ABS you have to bleed the brakes in a certain order. If you don't follow the order of how to bleed the brakes, you won't get all the air out which is what your dealing with
Hold on, let me get you the steps.
so you can give it to your mechanic so he can bleed the brakes properly for you.
http://peapull.com/o.php?n=bleed brakes with ABS.jpg
Click that link to download the image with the directions on how to bleed the brake properly
If they just went around and bleed the wheels, that is not the right way and won't get the air out.
They need to bleed the wheels in this order!!!
I would think they would know how to do this, but I can have them bleed the system again. At this point, all service through them is free until the issue is fixed. Any other suggestions it could be? You think the vacuum chamber/booster is probably okay?
To be honest..
Most repair shops don't know that they need to bleed Nissan Wheels in this order if equip with ABS
Rule of thumb is normally bleed rear brakes, and then front. There normally isn't a order. But with the ABS system cause of the valves in the ABS unit, they have to be bleed in this order.
Ok, I will have them re-bleed and see if this works.
You got it. Make sure you print that image I gave you and give it to them to perform the bleeding steps that exact way!!!
Already done...:) Thank you.
If you have any more questions on this, please feel free to return back to this question. Even after you Rate me. Follow up questions on the same topic are no additional charge.
Your welcome and thank you for using JustAnswer.com
Excellent. Will do!
Was wondering...if there is an air bubble in the system, wouldn't it affect the brakes all the time and not just when the truck has been sitting overnight?
Got it. Will let you know. Thanks.