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feverdog71
Novice
Sep 28, 2013, 11:33 AM
Post #1 of 10
(1898 views)
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Initial Pull
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Hi,
Got a 90 Silverado that just started doing this. When I stomp on the brakes it initially pulls to one side, but then evens out.
Could this be a sticking proportional valve? Or mechanical?
Thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 28, 2013, 11:58 AM
Post #2 of 10
(1888 views)
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Re: Initial Pull
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Not the proportioning valve as that's front to rear. More likely..... 1. freezing caliper, lube of caliper, brake hose on the list, brake pads unevenly worn because of this, contaminated with grease or something. Gotta plain look. If anything is different one side to the other for a 1990 if not done recently I'd throw the book at it - not as pricey as you might think IMO,
T
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feverdog71
Novice
Sep 29, 2013, 5:41 AM
Post #3 of 10
(1872 views)
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Re: Initial Pull
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I just put new pads and calipers on a year or two ago and lubed everything up. I only drive it 10x per year.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 29, 2013, 5:47 AM
Post #4 of 10
(1871 views)
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Re: Initial Pull
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Don't assume anything just because it was previously worked on. My suspicions would be with the rubber flex hoses. Very common problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 29, 2013, 6:29 AM
Post #5 of 10
(1867 views)
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Re: Initial Pull
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feverdog: Ditto - just because it was done somewhat recently isn't a sure thing. Calipers are rebuilt and who knows how well or what the core they used was like?
Flex hoses should go just because IMO. Do yourself a favor and put PB on the connection to flare nut line and all right now so you have a good chance of it not breaking there or twisting up the brake line if still good. If not good anyway get rid of them before a surprise blow out.
Remember do both sides equally. It's pulling so you have your warning something isn't right,
T
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feverdog71
Novice
Oct 14, 2013, 11:08 AM
Post #6 of 10
(1835 views)
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Re: Initial Pull
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Meant to say thanks to you guys sooner. Put new flex lines on and it fixed the problem. Still not sure how a flex line can make it pull to one side, but apparently it can.
Thanks!
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 14, 2013, 11:24 AM
Post #7 of 10
(1834 views)
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Re: Initial Pull
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It can and does a lot. The inside liner ruptures and restrict the hose in both directions.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 14, 2013, 4:40 PM
Post #8 of 10
(1827 views)
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Re: Initial Pull
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You should also check for loose steering or suspension parts. Worn out control arm bushings or tie rod play can cause that too.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 14, 2013, 4:46 PM
Post #9 of 10
(1825 views)
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Re: Initial Pull
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He just said he had it fixed.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 14, 2013, 4:49 PM
Post #10 of 10
(1823 views)
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Re: Initial Pull
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Oops....I missed that part.
Guess this one is good enough to be closed as solved then. Thanks for the follow up.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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