Are you suppose to adjust the fuel with the hose on it or off?

 

If its a B+M one, i believe you have to take the hose off to get to the lil nut anyway... So i would go with taking it off, adjust, put it back on, turn on car check the pressure, and adjust again till you get it where you want it..... Good luck Bori... by the way, why are u increasing pressure? or are u lowering it... You should really do these things with at least a wideband O2 sensor to make sure u are not running to lean or too rich...

 

My AEM, you do it with the line off. I just run the car, pull the line and adjust it to whatever pressure I like. You HAVE to adjust the adjustables at least once because when you install them, you have no clue what they're set for.

 

Put the gage on and see what pressure you're at with the oem fpr. Install the adjustable and set it to the same pressure. Adjustments are to be made with vacuum hose off.

 

With my B&M FPR, I think its around 40psi, maybe +5 or some ish'. Also with the vacuum line off, the manual says it is telling the ECU that you are at wide open throttle, I dunno if that info can help in your question you're trying to answer.

 

The FPR tries to maintain a constant pressure at the injectors so, as manifold vacuum goes up (closer to atmospheric pressure) fuel pressure will rise to match it.

B18C1/C5 engine, stock pressure with line disconnected is 48-55psi. B16 might be the same. LS/RS engines (B18B) and probably D engines are less.

 

almost everyone is with the vacume line off. Im about to go adjust mine again. I jsut put on fuel air ratio..
jeff

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DjGuamstyles &raquo;</TD></TR><TR><TD CLASS="quote">With my B&M FPR, I think its around 40psi, maybe +5 or some ish'. Also with the vacuum line off, the manual says it is telling the ECU that you are at wide open throttle, I dunno if that info can help in your question you're trying to answer.</TD></TR></TABLE>

Yes. Vacuum hose off simulates full throttle.
To sum up the thread, if you adjust the fuel pressure with the hose on you'll be running hella rich.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MasterKwan &raquo;</TD></TR><TR><TD CLASS="quote">The FPR tries to maintain a constant pressure at the injectors so, as manifold vacuum goes up (closer to atmospheric pressure) fuel pressure will rise to match it.

B18C1/C5 engine, stock pressure with line disconnected is 48-55psi. B16 might be the same. LS/RS engines (B18B) and probably D engines are less. </TD></TR></TABLE>

b16 fuel pressure is 35-41 psi with hose disconnected.

 

Thanks i was going to say im at 40psi and it says im still rich. Il go a bit leaner to get good fuel cunsumtion..
jeff

 

According to my A/F ratio guage, my engine can't find a balance. The meter fluctuates, cannot stay constant. I think its the Throttle Position Sensor, cause my idle rises to normal when the vacuum line is taken off the FPR (simulating WOT) which overrides the ECUs A/F management. Idle is around 300 when vacuum line is on. Could be just the timing too.