Why does my brake pedal rise up when I turn off the car?

2011 Nismo#91 · 04-18-2019, 05:53 AM

After doing a CZP Silicone Master Hose Kit install my car has recently started lifting the brake pedal (with considerable force) almost immediately after I turn it off. Why? Could this be a vacuum leak in the booster? The brakes work perfectly while the car is running.

JARblue · 04-18-2019, 07:47 AM

You moved the internal check valve from the old brake booster hose to the new one, right?

2011 Nismo#91 · 04-18-2019, 08:03 AM

Not sure, I had to have it done at a local but good shop, didn't have time to do it myself. I'll check with them, thanks for the reply.

cavemancan · 04-18-2019, 12:53 PM

Maybe air in the lines?

2011 Nismo#91 · 04-18-2019, 06:30 PM

Quote:

Originally Posted by JARblue

You moved the internal check valve from the old brake booster hose to the new one, right?

Yes that was the issue, I can't seem to find a replacement anywhere online so fire now I have a little bit of a S14 in my Z34.

04-18-2019, 05:53 AM	#1 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	Why does my brake pedal rise up when I turn off the car? After doing a CZP Silicone Master Hose Kit install my car has recently started lifting the brake pedal (with considerable force) almost immediately after I turn it off. Why? Could this be a vacuum leak in the booster? The brakes work perfectly while the car is running.

04-18-2019, 07:47 AM	#2 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,449 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	You moved the internal check valve from the old brake booster hose to the new one, right? __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

04-18-2019, 12:53 PM	#4 (permalink)
cavemancan Enthusiast Member Join Date: Mar 2012 Location: Miami Posts: 302 Drives: 09 370Z TourSport MT Rep Power: 249	Maybe air in the lines? __________________ Mazda Rx8 MT Titanium - SOLD! 2009 370Z T-Sport MT Black - Takeda Intake, Swift springs, Rear Camber kit, SS B Lines, FI Exhaust, Z Speed CMAK Flywheel/Clutch Kit, Stillen Brake Cooling.

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04-18-2019, 08:03 AM	#3 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	Not sure, I had to have it done at a local but good shop, didn't have time to do it myself. I'll check with them, thanks for the reply.