87 Bronco 11, Fuel Rack -plastic knob

[asidpara]

I see a plastic knob covering some kind of control on the fuel rack. IIt does turn and would like to know how to adjust. Please advise.

 

[lil_Blue_Ford]

The only plastic knob I can remember seeing on the fuel rail really is just a cap that protects the shrader style valve for checking the fuel pressure and bleeding air from the fuel lines.

 

[Robert_1967]

yep, that just the cover to protect the valve, that is where you check your fuel pressure with a fuel pressure gauge.

Robert

 

[asidpara]

Thanks for the explanation. I found it loose and it was causing slow & fast idle. I hand tightened it and it works fine. To day was my first day at this forum and already got prompt and good response. Thanks Guys....!!

 

[adsm08]

Uh.....

It shouldn't be able to do that....

It's just a dust cap, no different from the caps on your valve stems. In fact i lose the one on my sister's car and put a valve stem cap on in its place. It doesn't have the ability to affect your idle speed...

 

[WTF]

gotta love noobs.....

 

[lil_Blue_Ford]

Uh.....

It shouldn't be able to do that....

It's just a dust cap, no different from the caps on your valve stems. In fact i lose the one on my sister's car and put a valve stem cap on in its place. It doesn't have the ability to affect your idle speed...

Well, it might... if the valve itself is bad and causing a fuel seepage....

But yea, under normal circumstances it shouldn't affect the idle.

 

[adsm08]

gotta love noobs.....

Dude, be nice. Not everyone is a mechanic.

Well, it might... if the valve itself is bad and causing a fuel seepage....

That's a good point. But that cap won't hold out forever. OP might want to look into a new vavle.