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Initial Pull


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feverdog71
Novice

Sep 28, 2013, 11:33 AM

Post #1 of 10 (1723 views)
  post locked   Initial Pull  

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


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Sep 28, 2013, 11:58 AM

Post #2 of 10 (1713 views)
  post locked   Re: Initial Pull  

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



feverdog71
Novice

Sep 29, 2013, 5:41 AM

Post #3 of 10 (1697 views)
  post locked   Re: Initial Pull  

I just put new pads and calipers on a year or two ago and lubed everything up. I only drive it 10x per year.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 29, 2013, 5:47 AM

Post #4 of 10 (1696 views)
  post locked   Re: Initial Pull  

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.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Sep 29, 2013, 6:29 AM

Post #5 of 10 (1692 views)
  post locked   Re: Initial Pull  

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



feverdog71
Novice

Oct 14, 2013, 11:08 AM

Post #6 of 10 (1660 views)
  post locked   Re: Initial Pull  

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!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 14, 2013, 11:24 AM

Post #7 of 10 (1659 views)
  post locked   Re: Initial Pull  

It can and does a lot. The inside liner ruptures and restrict the hose in both directions.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 14, 2013, 4:40 PM

Post #8 of 10 (1652 views)
  post locked   Re: Initial Pull  

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.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 14, 2013, 4:46 PM

Post #9 of 10 (1650 views)
  post locked   Re: Initial Pull  

He just said he had it fixed.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 14, 2013, 4:49 PM

Post #10 of 10 (1648 views)
  post locked   Re: Initial Pull  

Oops....I missed that part.

Guess this one is good enough to be closed as solved then. Thanks for the follow up.Smile





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.






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