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LS1 brakes hard brake pedal problem

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Old 09-16-2006, 11:41 AM
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Car: 1988 IROC Convertible
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LS1 brakes hard brake pedal problem

I need help with this problem. I upgraded to LS1 brakes on all 4 wheels. I have new Earl's braided lines. I installed and bleed everything but got a REALLY hard brake pedal with barely any stopping power. I mean I had to GET ON that thing to get the car to stop. I thought it might be a bad booster but it's holding 15-20 lbs (not sure on the number) of vacuum just fine and the engine is producing good vacuum as well. Could I possibly have a stuck caliper? How would I check for this? What other suggestions could you give me? Thanks.
Old 11-18-2006, 11:44 AM
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bump. Help please.
Old 11-18-2006, 12:47 PM
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Car: 1989 Trans Am GTA
Engine: Stock LS1
Transmission: T56
Axle/Gears: 3.70 9 bolt
I replied to your other post in the FAQ section, but here it is again for future searchs:

Well, since noone else has stabbed at this here goes. You have good vacuum, and the booster is holding the vacuum. is there anything that could be blocking the pedal (that pesky brick rolled under it again??)? Even if one caliper was locked up you should have decent stopping power and if it was a front caliper a really noticable pull. Could it be possible you have a blockage in the system. Possibly in the MC not allowing the pedal to travel?

Those new brake lines didn't have any "remove these plugs before use" tags on them did they? It almost sounds like the front brakes are not clamping for some reason. take them off and have someone SLOWLY press the brake pedal, see of the pistons move.

Hope this helps.
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