1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Zigzagging while breaking

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Old Oct 10, 2005 | 11:10 PM
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Default Zigzagging while breaking

been having a problem with my car ...it seems when i stop either lightly or hard the car zigzags back and forth....it'* only at speeds above 45...any ideas?


i just changed the brakes and rotors...think it'* a caliper?


James
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Old Oct 11, 2005 | 02:38 AM
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I think a sticking caliper might cause a zigzag stop. Did you check, clean, and lube the caliper pins and bushings when you changed the rotors and pads? How did the piston boots look on the calipers? Did you open the caliper bleeder when you pushed the piston back so you wouldn't send contaminated brake fluid back up to the reservoir?
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Old Oct 11, 2005 | 08:15 AM
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my dad did all that....don't remember how the boots looked


James
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Old Oct 11, 2005 | 10:32 AM
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Did the zigzag start right after the brake job?
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Old Oct 11, 2005 | 08:41 PM
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no...it was before....


James
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Old Oct 11, 2005 | 09:26 PM
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OK, my '92 FSM suggests that uneven braking action side to side may be caused by:
incorrect front end alignment,
loose front suspension attachments,
contaminated brake lining (like if you got some grease on the pads),
leaks from caliper piston seal,
missing or loose brake assembly attachments.
restricted brake fluid passage, (possibly a bad flex hose)
incorrect tire pressure,
sticking caliper piston

If you are not comfortable checking this stuff yourself, take it to a shop you trust. Brakes aren't something you want to guess about.
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Old Oct 11, 2005 | 10:43 PM
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it'* gotta be my tires, the alignment, or tire pressure.. checking now


James
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