help with brakes, hard pedal.

[queenskid926]

ok i just finish a jdm 7mgte swap and i have no power brakes, Brake pedal is hard as rock.

I check the vacuum lines and even replaced the vacuum line that runs from the intake mani to the brake booster, no difference.

The brakes on this car worked perfectly be4 the swap, car has only been sitting for 2 weeks. Granted its been below freezing temps the whole time but still i doubt all 4 calipers are frozen?

So what do you guys think? a vacuum problem? or replace brake booster or master cylinder?

Im thinking maybe if i re_bleed the brakes?
Idk i never had this problem on my last 7m swap that i did.


what could all of the possibilities be that i lost my power brakes.?

 

[cuel]

Isn't there a one way valve in the vacuum line from the intake to the booster? If you have it backwards, could be your problem.

 

[queenskid926]

Isn't there a one way valve in the vacuum line from the intake to the booster? If you have it backwards, could be your problem.

o shyt i did not know that, imma go check that now

 

[cuel]

I'd check for vacuum leaks, first...

I'm not really sure if that's a valve, or just a union up above the booster.

 

[WhtMa71]

I was thinking the same thing about the check valve. Your brake booster (big black thing behind the master cyl.) could have a leak.

 

[cuel]

This is a dumb question, but is the car running when you have the hard pedal issue?

 

[queenskid926]

This is a dumb question, but is the car running when you have the hard pedal issue?

lol yea man its runnin lol i did just do a whole swap lol im not that much of a dumbass lol

 

[queenskid926]

fixed the check valve was clogged, swap in another one and issue fixed. And yea it was clogged cause after i swaped in the other one i tried to run it both ways and it didnt work.

thanks cuel for your help and guiding me in the right direction.

 

[Who]

Thanks for telling us the end results. Many threads here are left up on the air.

 

[queenskid926]

Thanks for telling us the end results. Many threads here are left up on the air.

no problem, i always try to do that with all my threads, help the next person out.