S2000 Under The Hood S2000 Technical and Mechanical discussions.

NEED HELP ASAP HUGE LEAN RUNNING ISSUE

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Old Aug 6, 2010 | 10:58 AM
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Default NEED HELP ASAP HUGE LEAN RUNNING ISSUE

01 AP1

MODS

BUILT HEAD VALVES DUAL SPRINGS TIT RETAINERS. STOCK CAMS
SPOON HEADGASKET (SAYS A TUNE IS NOT NEEDED)

IVE READ ALL THE FORUMS IVE TRIED ALL THE FIXES STILL NOTHING
I RUN LEAN BIG TIME.. I HAVE AEM WIDEBAND
AS SOON AS I MASH ON THE GAS IT GOES TO 11 THEN LEANS OUT PAST 17.. SCREEN GOES BLANK..
LOSS OF POWER

IVE JUST HAVE VALVES RE CHECKED... IVE REPLACED 02 SENSORS.. IVE TRIED MAP SENSOR.. I CHECK MY COOLANT TEMP SENSOR... I JSTU PUT NEW FUEL PUMP IN... IVE TIGHTENED EVERYTHING...

IM LOST... IM A MECHANIC SO GETTIN PARTS ISNT AN ISSUE FOR ME... I DO HAVE AN EMANAGE BLUE BUT ITS NOT HOOKED UP BC I THOUGHT THAT WAS THE ISSUE.. BUT ITS NOT...

I PUNCH IT AROUND A CORNER.. NORMALLY YOUD RIP RIGHT? NOT HERE.. ONLY POWER IS ABOVE 6K IN VTEC

I WANT TO FIX THIS THING SO I CAN BOOST IT ALREADY

PLEASE HELP ME
FREZZZZ992@YAHOO.COM
I RARELY GET ON COMPUTER
THANKS!!
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Old Aug 6, 2010 | 11:05 AM
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MY COMPRESSION NUMBERS ARE BETWEEN 230 AND 250... AND I HAVE A TEST PIPE... BUT THE CAR RAN FINE WITH TEST PIPE BEFORE.... ITS BEEN THIS WAY FOR ABOUT 6 MONTHS... BUT IM FINALLY GETING AROUND TO FIXING IT.. BECAUSE I WANT TO FINISH THIS TURBO BUILD.. BUT I NEED IT TO RUN RIGHT FIRST...
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Old Aug 6, 2010 | 11:08 AM
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There 's no need to write the hole post in all caps.
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Old Aug 6, 2010 | 11:23 AM
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ITS IN CAPS BECAUSE I RUN A BUSINESS AND EVERYTHING WE TYPE HERE NEEDS TO BE IN CAPS... ANAL?
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Old Aug 6, 2010 | 11:31 AM
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Your running a spoon hg and you plan on turboing your car? Not to mention you can't figure out what's wrong with it now. Imagine all the headaches your going to have after you turbo it.

It could be a ton of things... Did you tune your car?
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Old Aug 6, 2010 | 12:26 PM
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So its a stock car with a ported head and valvetrain with HG? Stock ECU I asume. I am not familiar with emanage but can you adjust fuel tables with that and has that be attempted. Perhaps the stock ecu or stockish fuel tables can not keep up with the build head flow rate? Do you have anyother issue with running? No signs of a vacum leak? What are you pulling for vac at idle?
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Old Aug 6, 2010 | 12:31 PM
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wow u think im that stupid.. come on.. did i not say i want it to run right before i boost it? ok think about what that means... no im not going to use that head gasket.. but i WANT TO FIX THE PROBLEM FIRST
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Old Aug 6, 2010 | 12:33 PM
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heads not ported.... castings are removed and exhaust side is polished... vac is at 30-24 at idle.... i tried tuning it before.. didnt make a difference....im attempting to retune it tonight.. if i can get thise damn aem wideband to work with emanage blue.... i was told white to white and grey to same ground as wideband.. well with that connected... car wont idle or run.. so itsnot right...
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Old Aug 6, 2010 | 01:45 PM
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Does the vacuum at idle fluctuate from 30-24 inches? It doesnt stay at a more steady reading? Are you able to see what voltage reading the map has at idle and if that jumps around as well? The only things I am learning toward are a vac leak, low fuel pressure or restricted injectors. Did you swap the primary 02 with a honda one? Maybe plug off or pinch the purge control valve hose to make sure your not getting a leak from a bad purge valve?

Your not running e85 or a highly oygenated gas by chance?
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Old Aug 6, 2010 | 04:23 PM
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this is what i did today to the car... i hooked up a snapon scan tool.. went into the data menu and ran the car.. check all voltages and readings and everything seemed ok... nothing rly jumped around at idle...
its not fuel pressure... bc i just put in a walbro 255 thinking it was that problem my self... and to back that up.. i hooked up my emanage and tune and drove the car... i literaly flooded the engine... and still couldnt bring it to rich...let alone any where near normal... it stays lean so tuning it didnt do any thing... weird huh? i kno im starting to hate this damn car.... i put a brand new denso o2 in... .. injectors it might be.. havent gotten to that yet.. thats next on my list...i really dont think its a vac leak bc it idles great
my acv is dissconnected and the vac line leading to it is pluged off...but i really doubt that the airpump would cause this issue.. since its been like this long before i ever did that... 93 and above

ill run a smoke test on both vac and emissions next week to see if it leaks... its like something some sensor or something is messed up reading things all wacky casuing eco to override emanage
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