Fuel reg. ??
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
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From: Cape Cod Ma
Fuel reg. ??
I've herd something like this, that if you elliminate the vacum hose to the fuel regulator and cap the ends off you get about 5 more pounds of fuel through the injectors. Is this true, why havent I hered of this before?
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Fuel reg. ?? (redfast)
When you go to WOT manifold vacuum drops to nearly zero and fuel pressure rises to very close to the value it achieves with the vacuum line disconnected.
So, the only effect of disconnecting the vacuum line for normal driving is that there may be a little better atomization at part throttle, but here, in closed loop mode, the ECM simply compensates by reducing injector pulse width.
The reason for increasing fuel pressure with an AFPR is so that at WOT there will be more fuel flow, but here too the ECM compensates at part throttle operation, when in closed loop mode.
The bottom line, don't disconnect the vacuum line. :nono:
So, the only effect of disconnecting the vacuum line for normal driving is that there may be a little better atomization at part throttle, but here, in closed loop mode, the ECM simply compensates by reducing injector pulse width.
The reason for increasing fuel pressure with an AFPR is so that at WOT there will be more fuel flow, but here too the ECM compensates at part throttle operation, when in closed loop mode.
The bottom line, don't disconnect the vacuum line. :nono:
