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#1 |
JDM Soldier
![]() Join Date: Apr 2009
Location: IA
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Swapped a b16 in a crx. Code 43 comes up. Replaced the fuel pump with walbro 255. Still getn Code 43.
Fuel pressure went from 35 to 55 after installed.. does it need a FPR and adjust it? Put the main relay last year and sometimes i dont hear the fuel pump whine Any help or ideas would be appreciated. Thanks.
Last edited by Duh-kneel; 05/25/2010 at 12:27 PM.
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#2 |
F.T.C.
![]() Join Date: Mar 2007
Location: Des Moines
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o2 sensor.?
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#3 |
JDM King
![]() Join Date: Jul 2007
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what ecu are you running ??
Code 43 is generally the Oxy sensor being lazy or dead.It's easiest to just replace it than to try and test it. When it dies, the ECU goes into default If you test it, follow the Shop manual and make sure that you use a DIGITAL MULTIMETER ONLY> Analogue ones kill sensors real quick.
Last edited by ososlohatch; 05/25/2010 at 01:28 PM.
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#4 |
JDM Knight
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This is where I love my scan tool and pid list... look up to spec or rang and see if your o2 is active at all
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#5 | |
JDM Knight
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#6 | |
JDM King
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#7 | |
JDM Knight
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I researched and code 43 said Fuel Supply System. A faulty o2 sensor will trigger that? (just clarifying) but yeah, the o2 sensor was one I had laying around from my Acura legend that had like 170k miles on it. Fuel filter I can't remember if I ever changed it but I might as well since they're pretty cheap |
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#8 | |
JDM Knight
![]() Join Date: Aug 2007
Posts: 606
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Will I be needing to get an adjustable FPR to lower it to 42psi? Correct me if I'm wrong but I thought the oem FPR was supposed to have fuel set at a specific pressure?? |
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#9 | |
JDM King
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#10 | |
JDM Knight
![]() Join Date: Aug 2007
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also a quick question to be sure: MY FUEL FILTER HAS BOTH THE INLET AND OUTLET HOLE ON TOP OF THE FILTER, WHICH HOLE DOES THE PRESSURE GAUGE GO OVER?? |
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#11 | |
Vinyl Specialist
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#12 | |
JDM Knight
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so is mine over the wrong hole? |
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#13 |
Vinyl Specialist
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gauge goes on the line leading to the fuel rail and not the one going towards the firewall.
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#14 |
JDM Knight
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Haha i had a feeling it might be wrong, the fuel pressure gauge was installed by the previous owner so i assumed he knew what he was doing, but i guess not.
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#15 |
Vinyl Specialist
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Yes sir...........and as i always tell everyone, unless you know the owners extremely well never assume anything on a vehicle was installed properly. There are many guys on this site I would trust in a heart beat to install things...........and then there are those that think duct tape, glue, and hammers are the ultimate installation helpers...lol
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#16 | |
The Tranny Guy
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#17 |
Vinyl Specialist
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LOL I was quoting that last part for myself....LOL I love duct tape and when mixed with glue it is stronger then JB Weld....which is why I need the hammer in case them parts get stuck together......... ha ha ha
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#18 |
JDM Knight
![]() Join Date: Aug 2007
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My B&M Commandflo came in today. Got it installed.... BUT the lowest i can get it to is 52PSI!!! What is going on now?!?!?!
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#19 |
JDM King
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what fuel pump are you running and what is your idle rpm?
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#20 |
JDM Knight
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I am running a Walbro 255. My idle rpm at normal temp is about 900-1000ish.
I installed a new fuel filter and different O2 sensor and they pretty much got rid of my erratic idling. I think the filter was clogged or something. But other than that, I'm unable to lower my fuel pressure from the 58psi it was at before. |
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#21 | |
JDM King
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#22 |
JDM Knight
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Is there ANY chance the fuel pressure gauge itself, could be the problem? maybe like giving me a wrong reading? Because im not sure how old it is, it was on the car when i bought it. I recently installed a B&M Commandflo (adjustable fuel pressure modifier) and set it to it lowest. Fuel pressure is lower but not the 42PSI i was trying to go for.
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#23 | |
JDM King
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I'd try a good name brand gauge or just go to a local hydrolic shop and get a good gauge __________________ ¿?¿?¿?¿?¿?¿?¿?¿{-}-{},{}_{},{}-{-}¿?¿?¿?¿??¿?¿?¿ {}s0sl{} |
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#24 |
JDM Knight
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Yeah, I think I'll just go ahead and find a good fuel pressure gauge. I better do it quick, because now my car has somewhat of a problem trying to start-up.
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#25 |
JDM King
![]() Join Date: Jul 2007
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i'd set you fpr in the middle, adjusting it to lean will cause your car not to start, put it half way out and you should fire up easy again, sound like you just got a chinese fuel gauge
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