Hi, I've finished my swap and i'm riding my engine for the beginning not over 5k rpm. The problem is that I read on the gauge only 7 or 8 psi... is the boost higher in higher rev?? I have no any code on the computer so this is apparently not the f&$% code 54 ...


My engine: ST185RC JDM with no modification (stock bov, stock intercooler)

Thanks!!

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no. it should hit 10-12 above 2500-3000 rpm. What size exhaust are you running? Is your car warming up completely? It sounds like your in safe/low boost mode. Also, make sure your gauge is accurate. I was trying to diagnose a boost issue for a long time. I had the boost issue and the gauge was reading low. Make sure when the engine is off the gauge reads 0 psi.

gauge is accurate, temp is ok, no code on the ecu, how to remove this low boost mode, can i just bypass it manually with the wastegate??

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yes, but you need to find out for sure if you are in low boost mode or not. In the stickies, there are instructions on how to install these leds, and tie them into the ecu. If you are in low boost mode, you need to find out why before you crank the boost up. My issue was the afm. Have the screws been messed with? I was able to fix my afm

Definitely low boost mode but how I can make sure, I didn't find the stickies that you talk about. I'm gonna bypass the tvsv to 12psi. Is there any other thing than boost that is affected when running in low boost mode??

a bit off topic, i know that the RC ecu allows boost of up to 1.1bar instead of .83 bar but is it plug and play and are all RC ecu tuned at 230bhp or just the JDM's. thanks

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A restrictive exhaust will cause low boost. but not that low. Heres the sticky

knock leds

This post has been edited by toyotacrazy: Sep 2, 2007 - 7:03 PM

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normal st185 ecu runs 10psi stock and has fuel and timing maps for 12psi with a 12psi fuel cut. it also has maps for 14 and 16psi, but for some reason, they were locked out by toyota (probably due to the crappy stock intercooler).

the RC ecu also runs 10psi stock, but has fuel cut at about 16-17psi, because of the much better intercooler. this would leave me to believe that those last 2 fuel/timing maps were also enabled.

its not a plug and play upgrade, and you would also need the RC afm. a better idea would be to get a rom tune from ATS, since they unlock those high boost fuel/timing maps when they do the tune. or wait untill usertunable rom tunes become a reality (hopefully very soon! ).

This post has been edited by lagos: Sep 2, 2007 - 10:37 AM

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so lagos if i do buy the RC ecu the only thing i need extra is the AFM right? wiring are the same or do i have to re-wire?...btw how much is reasonable for a RC W2A int and the ecu?

i really dont know how whats different about the wiring, probably not much... but your going to have a hard time tracking down that afm and ecu. your best bet is to wait for user tunable rom tunes, or get the mail order one from ats.

man thats sounds more difficult than i imagine...last question the W2A int is just direct bolt on right?

edit: lagos i appreciate ur help

This post has been edited by lubu: Sep 2, 2007 - 11:42 AM

yeah, you can add the water to air intercooler to any 3sgte.