Voltage drop
19 May 2012, 01:22 PM
#5
When any electrical device is running, there should be a potential difference, (difference in vltage) across it's terminals. Without that, it can't push the current through.
Out of interest, what PD do you have a cross the terminals when it's running?
Out of interest, what PD do you have a cross the terminals when it's running?
19 May 2012, 02:40 PM
#6
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Becareful with the VOHM there.
You can blow out the box controling fuel pump duty cycle. It just mean you need to run a relayed power from the bat to fuel pump.
But note, The scoob runs a 3 step duty cycle. So unless you are a full power.
The voltage will be less at the pump, due to the fuel pump controller.
Not usually this unit is either working or DEAD.
Whats the problem that you are trying to fix?
You can blow out the box controling fuel pump duty cycle. It just mean you need to run a relayed power from the bat to fuel pump.
But note, The scoob runs a 3 step duty cycle. So unless you are a full power.
The voltage will be less at the pump, due to the fuel pump controller.
Not usually this unit is either working or DEAD.
Whats the problem that you are trying to fix?
Last edited by silver6933; 19 May 2012 at 02:42 PM.
20 May 2012, 12:06 AM
#7
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At this stage not sure what prob is so just want to test everything related.
My 650cc maxed out at 405bhp.
Mapped said they should be good for 470 ish so my have fuel pressure prob, got fuel pressure gauge which am going to install to check pressure while running and before changing anything.
New pump installed (rcm) before mapping.
My 650cc maxed out at 405bhp.
Mapped said they should be good for 470 ish so my have fuel pressure prob, got fuel pressure gauge which am going to install to check pressure while running and before changing anything.
New pump installed (rcm) before mapping.
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20 May 2012, 12:22 AM
#8
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On the newage does the ECU not control the pump by altering the voltage, ie if giving it max the pump is given max voltage but when driving round sedately the voltage is stepped down. I am sure I have seen this somewhere, as was wondering about it for when I fit my Bosch pump from the swirl pot.
20 May 2012, 10:42 AM
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You need to give us full and complete information for us to give you any meaningful feedback.
Running a simtek info and putting out 405hp is not enough info. Was the IDC maxed at XX %.
Whats your AFR closed loop.
Running a simtek info and putting out 405hp is not enough info. Was the IDC maxed at XX %.
Whats your AFR closed loop.
20 May 2012, 11:48 PM
#12
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MY03 WRX STI
2.1 stroker
MD321T
Simtek
650cc
RCM pump
FMIC
Headers and up pipe
3" full decat
Intake pipe
3 bar map sensor
After 2.1 engine upgrade, when mapped injectors maxed out at 405bhp, 100% duty cycle.
After speaking to mapper was told there was poss fuel pressure prob as with engine spec should be seeing more power and injectors not maxed out.
AFR? Don't no answer to that.
Hope the above info give someone better idea.
Cheers
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