How do I log for fuel pumps?

Tommi300 · 04-26-2010, 05:25 PM

There have been a batch of dodgy 255lph walbro fuel pumps knocking about but how would I know if mine was flowing 255lph or not with flow testing, is there some little trick with RR?
Cheers
tommi

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Brock31 · 04-26-2010, 05:41 PM

The only parameters I am aware of for logging the FP are the FP Duty cycle, Fuel pressure and fuel tank pressure depending on which ECU you have 16 bit or 32 bit.

Tommi300 · 04-26-2010, 05:45 PM

I tried logging Duty cycle and it goes up to 100% but then again so would a faulty one, just wondered if there was anything else to look out for.

Jubert69 · 04-26-2010, 11:59 PM

I would think your injector duty cycle would show a bad fuel pump. But this could also throw faulty injectors to the mix.

But of course you could connect a FP gauge(I know this doesn't answer your main question)

Tommi300 · 04-27-2010, 11:05 AM

The reason I ask is that when I mapped the car it was running sweet 11.5's using a LC-1 it was running 12's etc the other day so i had to richen it up. Could this be a fuel pump on its way out?

Jubert69 · 04-27-2010, 11:39 AM

Could be many things, how much did the temperature change?

04-26-2010, 05:25 PM	#1
Tommi300 Scooby Newbie Member#: 238537 Join Date: Feb 2010	How do I log for fuel pumps? There have been a batch of dodgy 255lph walbro fuel pumps knocking about but how would I know if mine was flowing 255lph or not with flow testing, is there some little trick with RR? Cheers tommi * Registered users of the site do not see these ads.

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04-26-2010, 05:41 PM	#2
Brock31 Scooby Specialist Member#: 128115 Join Date: Oct 2006 Chapter/Region: South East Location: Wilmington, NC Vehicle: 2004 4EAT Wagon PSM enginuity is cool	The only parameters I am aware of for logging the FP are the FP Duty cycle, Fuel pressure and fuel tank pressure depending on which ECU you have 16 bit or 32 bit.

04-26-2010, 05:45 PM	#3
Tommi300 Scooby Newbie Member#: 238537 Join Date: Feb 2010	I tried logging Duty cycle and it goes up to 100% but then again so would a faulty one, just wondered if there was anything else to look out for.

04-26-2010, 11:59 PM	#4
Jubert69 Scooby Specialist Member#: 167739 Join Date: Dec 2007 Location: CT Vehicle: 04 WRX	I would think your injector duty cycle would show a bad fuel pump. But this could also throw faulty injectors to the mix. But of course you could connect a FP gauge(I know this doesn't answer your main question)

04-27-2010, 11:05 AM	#5
Tommi300 Scooby Newbie Member#: 238537 Join Date: Feb 2010	The reason I ask is that when I mapped the car it was running sweet 11.5's using a LC-1 it was running 12's etc the other day so i had to richen it up. Could this be a fuel pump on its way out?

04-27-2010, 11:39 AM	#6
Jubert69 Scooby Specialist Member#: 167739 Join Date: Dec 2007 Location: CT Vehicle: 04 WRX	Could be many things, how much did the temperature change?