HELP running Pig ritch at idle and lean at boost??
01-25-11, 06:40 AM
#1
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HELP running Pig ritch at idle and lean at boost??
i just finish doing my 2jz swap and its running super ritch at idle 10.0 and when i go into boost it shoots up to 16.2, im not smashing on it just trying to see where im at with my wideband.
12 V modd and have a uprgraded walbro fuel pump
its a aristo 2jzgte stock twins on bpu upgrades
3 inch downpipe
fmic
STOCK PSI
12 V modd and have a uprgraded walbro fuel pump
its a aristo 2jzgte stock twins on bpu upgrades
3 inch downpipe
fmic
STOCK PSI
01-25-11, 07:12 AM
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i just finish doing my 2jz swap and its running super ritch at idle 10.0 and when i go into boost it shoots up to 16.2, im not smashing on it just trying to see where im at with my wideband.
12 V modd and have a uprgraded walbro fuel pump
its a aristo 2jzgte stock twins on bpu upgrades
3 inch downpipe
fmic
STOCK PSI
12 V modd and have a uprgraded walbro fuel pump
its a aristo 2jzgte stock twins on bpu upgrades
3 inch downpipe
fmic
STOCK PSI
01-25-11, 10:38 AM
#4
GS300s, TT Aristos and Supra TTs use a Fuel Pump ECU that puts out 9v at idle and 12v at higher load. The lower voltage at idle keeps the fuel supply lower than the stock FPR can hold. This is the reason that at idle your rich. Walbros cannot run at any voltage lower than 12v. BUT Denso pumps are designed to work at 9v and higher. As far as the lean on boost, I would "recalibrate" your AEM wideband or get a fresh O2 for it. I've had 3 AEM widebands and the O2s are pretty much unreliable after a year.
01-25-11, 11:04 AM
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GS300s, TT Aristos and Supra TTs use a Fuel Pump ECU that puts out 9v at idle and 12v at higher load. The lower voltage at idle keeps the fuel supply lower than the stock FPR can hold. This is the reason that at idle your rich. Walbros cannot run at any voltage lower than 12v. BUT Denso pumps are designed to work at 9v and higher. As far as the lean on boost, I would "recalibrate" your AEM wideband or get a fresh O2 for it. I've had 3 AEM widebands and the O2s are pretty much unreliable after a year.
Because only reason I did the 12v modd was because I've read that by doing this was a must for running a 2jzgte to avoid pre detination..ill give it a shot, thanks for the advise
Last edited by 1jzlover; 01-25-11 at 11:08 AM.
01-25-11, 11:33 AM
#7
Why replace the walbro with a Denso? I have run Walbros in all of my cars and it operates just fine. On the 2nd gen GS it drops voltage at idle/low loads just like you guys. I've built these cars like this countless times and they all idle perfectly normal with the reduced pump voltage.
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01-26-11, 06:39 AM
#8
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I just fiish checking all my vac lines,and i tested my wideband to see if it was defective and no its working just fine,Is there any other probs that would cause this problem without throwing a code???
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