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BBM Solenoid (Valve control) Problems EF 

 

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 Post subject: BBM Solenoid (Valve control) Problems EF
Posted: Sat Jul 31, 2010 7:20 pm 
Fordmods Newbie
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Age: 27

Posts: 7

Joined: 10th Feb 2010

Ride: EF Tickford Fairmont

Location: Gold Coast
QLD, Australia

Hey everyone.
I own an ef fairmont and iv been trying to find out why it wont rev over 3800rpm.
Iv traced it to the solenoid that controls the vacuum to the diaphragm that controls the butterfly in the broad band manifold.

Its not the solenoid itself as iv replaced it with a new unit. Its opens when ignition is on and so on as it should.

Iv tried my best reasearching the site. But iv found conflicting information on which pin controls the signal for the solenoid. I know the positive is just straight 12v. So it must be negative feed from ecu. So far from what iv found it could be pins 15 or 49?

It would be much appreciated if anyone could shed some light on which pin is the right one and if another sensor malfunctioning may cause the ecu to make the solenoid do this.

Cheers, Eddie

Last edited by eftickfordfairmont on Sun Aug 08, 2010 7:22 pm, edited 1 time in total.

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 Post subject: Re: BBM Solenoid (Valve control) Problems EF
Posted: Sun Aug 01, 2010 2:22 am 
Getting Side Ways
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Age: 38

Posts: 1320

Joined: 5th Nov 2004

Ride: 66 Coupe

Location: Perth
WA, Australia

it wouldnt be the solenoid at fault, its either a vacuum leak (split hose or broken tee) and also there is a check valve that holds vacuum for the dash that could be not working correctly. Easiest fix for that is to install another check valve inline with the vac line that goes to the dash.
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 Post subject: Re: BBM Solenoid (Valve control) Problems EF
Posted: Sun Aug 08, 2010 7:20 pm 
Fordmods Newbie
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Age: 27

Posts: 7

Joined: 10th Feb 2010

Ride: EF Tickford Fairmont

Location: Gold Coast
QLD, Australia

Iv checked the hoses in water.

Over the past 2 weeks iv been observing and playing around.

Iv found that its not the Solenoid or the wiring.
The hose keeps holding vaccum thats the problem.

I understand that the hose should continue to hold vaccuum via the check valve.
But how does it then release? when the solenoid closes.

I was thinking maybe the bbm diaphragm has a very small bleed hole???

ANYONE?
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