While reading a post about " Modern Brake upgrade" I was made aware of changing the check valve and booster filter may help with braking. So, I ran out to my 1986 GT V6 to try to find these items. I was able to locate the Check Valve on the brake booster so I set out to find the Booster filter ... From the post I read ; I was to follow the line (metal) coming from plenum on the throttle body back.. Mine looks like it terminates on the valve cover near the fire wall. Does this mean my 86 doesn't have an inline booster filter or am I looking in the wrong place?
While looking for the booster filter; I found the following hose and have no idea what it is or where it should terminate. I followed the line from open hose down the firewall to the air filter can from what I can tell. Can you guys help identify it and tell me where to plug in the hose?
Make sure that tube is either plugged at the end, or disconnected from the air filter canister and that hole then plugged. Otherwise, unfiltered engine bay air is continually being sucked into the filtered side of the air filter assembly/intake.
FIEROSOUND>>> Thank you .. I think I found it but confirmation would be appreciated Picture was taken from the drives side looking towards the firewall.
[This message has been edited by str8maxn (edited 10-17-2020).]
Originally posted by fierosound: On the firewall. Not used in later years, but not sure when they stopped.
Yes for 84-86 Fiero. Gone 87-88 Fiero that have bigger booster vac hoses and tubes.
Replacing the filter w/ Dorman et al plastic is not good. More so w/ V6 w/ exhaust parts close to and can melt it. If old is plugged, Could try cleaning old one but not sure just how is safe.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
FIEROSOUND>>> Thank you .. I think I found it but confirmation would be appreciated Picture was taken from the drives side looking towards the firewall.
Yup. Hose from tube under manifold to tube going through firewall.
FIEROSOUND>>> Thank you .. I think I found it but confirmation would be appreciated Picture was taken from the drives side looking towards the firewall.
Is deleting the filter the preferred method or new filter?
Once I got my Indy's engine running, it became apparent the power brake vacuum booster was no good so I replaced it. Sometime later when driving, my brake "disappeared" because of lack of vacuum. The filter had clogged with "rubber dust" in the line from the original brake booster's disintegrating diaphram.
Obviously the filter did its intended job by keeping that crap out of the engine. I took it out and blasted the line clear with compressed air before installing a new one.
Just saying it does have a purpose or GM wouldn't have put one in.
[This message has been edited by fierosound (edited 10-19-2020).]
Originally posted by fierosound: Just saying it does have a purpose or GM wouldn't have put one in.
And yet, they stopped using it.
I personally view that filter as a safety hazard. If it clogs up, you have no power brakes. And that can get you killed. Without that filter, the engine may ingest some debris. And it may damage the engine. But that's nowhere near as dangerous as brake failure.
They found out they could save 10 cents per car... ?
Pretty sure in my case, the Indy had sat for 20 years and the booster diaphram dried up into dust. My mistake was I didn't blow out the line when I replaced the booster.
Guys... anytime you replace the booster, blow out the line with compressed air.
[This message has been edited by fierosound (edited 10-20-2020).]
