Brake booster problem on zj
Just recently bought a 97 zj i6 disc all around and the brake pedal is hard as a rock and takes more effort than it should to stop. However it does stop.
The check valve works. The line leading to the check valve works.
When I pump the brake to release the vacuum and start the engine with my foot on the pedal, the pedal does drop slightly. The pedal makes a woosh as I press it but does not continue after the initial press.
The only test I haven't done is take a vac gauge to the line.
Theres nice pedal travel at idle in stop and go traffic.
My question is if the brake booster is at fault could it still hold vacuum and work slighty? Or are there other problems that could lead to this thanks