300ZX 4-Piston Caliper Upgrade Problem....

[REC]

I recently upgraded the calipers on my 90 Q45 with the 4 piston 300zx calipers. My brakes were working fine before but i wanted the increased performance. A member here named Wes told me that i could use the stock brake lines I just needed to shorten the brake line bolt to fit the caliper. After cutting off the heat shield and shortening the bolt me and a friend began to bleed the brakes and everything went as planned until i started the car. When the car isnt running there is plenty of pressure on the brake petal but as soon as the car is running the pedal is mushy and goes to the floor and doens't get any stiffer after pumping it several times. Obviously when driving around the parking lot there is literally no brakes at all as the pedal goes to the floor. I'm basically stuck and have no idea what the problem is. Has anyone experienced this before with this upgrade?

[Q451990]

It sounds like you still have air in the brake lines. I assume you bled the ABS actuator as well?

Heath

[REC]

How do you drain the ABS actuator?

[goody90q45]

.....A member here named Wes told me that i could use the stock brake lines I just needed to shorten the brake line bolt to fit the caliper.

Wes who? j/k

[JeromeS13]

Are you sure you have the calipers on the correct side? If not, it is impossible to bleed correctly. Make sure the bleeder valve is at the top of the caliper.

-Jerome

[elwesso]

Are you sure you have the calipers on the correct side? If not, it is impossible to bleed correctly. Make sure the bleeder valve is at the top of the caliper.

-Jerome

Who is this wes character? I bet hes got a Q that looks like hell but also runs like hell on the track