bad brake booster and hard to press brakes
hi guys, need some help here.
I've got an 87 4Runner i just bought, but the brakes are bad. i already replaced the master brakes pump, but know the feeling if spongy and the brakes are still hard to press. i checked the vacuum going to the brake booster, and there is vacuum there, so what else? the idle does not vary when brakes are applied. i was thinking that maybe i need a new brake booster, my question is, can i swap one from an 90-95 4 runner? also, do i need to re-bleed the brake lines because of the spongy feel? thanks guys.. |
If the rear brakes are badly out of adjustment you can get similar symptoms. The rear brakes are adjusted when the e-brake is applied. If the previous owner never used the e-brake (common if it has an automatic transmission), they could be pretty far out. Pull off a drum and take a look.
|
the rear brakes are fine, PO installed new brake shoes, and they are properly adjusted.
As for the emergency brake, there is a lot of length to pull the lever out, so I adjusted it, but still the brakes are hard, and now spongy and it fails to stop quickly. So i am not driving it right now. the Brake booster when I apply the brakes, kinda changes the RPMs a bit, but not as if it would die on me, is almost unnoticeable. the question is? can I use one from a newer 4runner? an 89-95 one? there are plenty of those in the junk yards around where i live, but no older ones like my truck. so what do you think? |
"spongy" is the classic sign of air in the brake system; it needs to be bled.
Here's the manual section: http://web.archive.org/web/201203161.../3checksan.pdf |
I'll need to re-bleed the system prior to finding out if the brake booster is bad.
I'll do that this week, like I said, the truck is parked and will not move it until this brake deal is done, safety first... Thanks... In case the booster is bad, does anyone confirmed if a newer one will fit on my 87? |
All times are GMT -8. The time now is 09:09 AM. |
© 2024 MH Sub I, LLC dba Internet Brands