alright first off i will start with my setup

its a b18c1 with stock bottom end and type r valvetrain.
t3/t4 57 ar with a 63 trim
log mani
2.5 inch downpipe.
2 inch ic pipes
jrc 6 inch ic
12.1 fmu (uberdata is sitting here but first i have to get her to run )
inline fuel pump.
wideband 02


i dont post on here much. most of the time the search works wonders. but i have to post this time. my problem is when i am driving and i start to hit boost the car just like no longer gives. it feels as if someone as slamming on the breaks. like no air is getting in but i am reading 7.5 pounds of boost. she than starts to lean out to like 15-16 a/f with egt's at about 1400-1450 to 1 and just sticks at about 4500 rpms. right around my vtec. my oil pressure is at about 60 when this is happing. but than other times wich are very few the car will boost like a champ and pull hard. and be right around 12-13 to one a/f

i have triple checked all my vacuum lines and evan re did them all. tried new injectors and replaced my fuel filter. my timing is at 12 degrees
i have a 2.5 inch downpipe with just a resinator on it. no cat nothing

please i am begging for someone to help. i have tried everything

 

i am lost someone please help

 

ditch the fmu and use that uber

 

i would but i cant evan get it to run right in the first place

 

what about a missing link

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18ccivics &raquo;</TD></TR><TR><TD CLASS="quote">what about a missing link</TD></TR></TABLE>

def sounds like the map is seeing + pressure...and making the car go haywire...id put my $ on that right there....get a basemap and run uber....youll be much better off!

 

I HAVE A B16A AND I AM HAVING THE SAME PROBLEM DO I NEED A MISSING LINK AS WELL

 

i have a missing link. i have the problem somewhat fixed i advanced the timming a lil bit and that helped. just still lean as hell. it went up to like 15-17 in boost. could my plugs be gapped to much and cause me to run lean?

i have everything for the uber i just cant use it till i get my new laptop. i use mac right now and thats no worky. hopefuly i can get one soon.

 

what size injectors your running?

 

you could also be blowing out the spark...casuing it to run hella rich...and in turn be washin out you cylinders

 

Firstly your stock map sensor can detect pressures up to 10 psig. so their is no need for a missing link if running under that pressure. Trust me I have compared the pressure seen by the map sensor with those on a boost guage.

Your problem is either you are running too lean because of the FM or as already stated it is because you are blowing out the spark or both.
Try getting a base map for the the other FM and try it also reduce your plug to 28 for a start.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hunderpressure &raquo;</TD></TR><TR><TD CLASS="quote">Firstly your stock map sensor can detect pressures up to 10 psig. so their is no need for a missing link if running under that pressure. Trust me I have compared the pressure seen by the map sensor with those on a boost guage.

Your problem is either you are running too lean because of the FM or as already stated it is because you are blowing out the spark or both.
Try getting a base map for the the other FM and try it also reduce your plug to 28 for a start.</TD></TR></TABLE>

yes this is true....but if he doesnt have it chipped for uber...you my friend are wrong...anything over 0psi...will cause a cel...hence the reason for the missing link so the map sensor wont see positive pressure....maybe you should do some reading before spreading mis-information....oh wait...thats why your a newb

 

what he;s trying to say by calling you a n00b is that the stock map sensor is capable of reading boost to 1.5 bar BUT since it is a stock ECU there still arent the maps programmed into the ecu for it too look for fuel and ign tables to use. and it will throw a cel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by advert &raquo;</TD></TR><TR><TD CLASS="quote">i have a missing link. i have the problem somewhat fixed i advanced the timming a lil bit and that helped. just still lean as hell. it went up to like 15-17 in boost. could my plugs be gapped to much and cause me to run lean?

i have everything for the uber i just cant use it till i get my new laptop. i use mac right now and thats no worky. hopefuly i can get one soon. </TD></TR></TABLE>

did you hook up the fmu right cause if its hooked up wrong it will make you run lean

 

yea its hooked up right.

my plugs are gapped at .30

 

Thats interesting because every Turbo honda I have seen pulls a map CEL after 4lbs of boost with stock setup.. Try this..when the car stumbles restart the car and see if this fixes it..It usually does..that will tell you if its the map sensor..Also have you changed that little filter in the side of the missing link lately?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nickromeo &raquo;</TD></TR><TR><TD CLASS="quote">what he;s trying to say by calling you a n00b is that the stock map sensor is capable of reading boost to 1.5 bar BUT since it is a stock ECU there still arent the maps programmed into the ecu for it too look for fuel and ign tables to use. and it will throw a cel.
</TD></TR></TABLE>




Modified by turbosnatch at 5:18 AM 9/7/2005

 

Actually, the Honda MAP sensor is a 1.8 bar (absolute) sensor.

 

the filter should be good. its a brand new missing link. also i read somewhere that the vacuume lines get hot and kinda pintch them together? could this be the problem. does this kinda stuff realy happen?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1FastCoupe &raquo;</TD></TR><TR><TD CLASS="quote">Thats interesting because every Turbo honda I have seen pulls a map CEL after 4lbs of boost with stock setup.. </TD></TR></TABLE>

its usually around 3 from datalogs ive seen...but pretty much any positive pressure (boost) will trigger a cel

yes vaccum lines will pinch together under vacuum and cause problems...use some thick walled rubber fuel line...ive found that works the best and is pretty heat resistant

 

alright i put some thicker fuel line on for vacuume tube. seems to work great. but here is the problem. 1st gear it pulls hard and nice with a perfect a/f second gear it starts to lean out and so on and so on.

 

thats because as you go up in gears the load increase....its why software like uber and crome have gear correction....and if you can watch your a/f's in 1st...well thats good...mine last for all of about 2 split seconds...then i hit the rev limiter...

you best bet is t up the fuel pressure so in 3rd gear you have pretty decent a/f's...but again the fmu is semi-alright....but id def be making the swtich to uber or crome asap!