My car was fully tuned at InlinePro about 4months ago..I cant seem to get it to idle like it used to....its throwing a Code 43 (fuel systems)....so far i have cleaned my IACV, changed spark plugs, changed oil, but to no avail...Its still throwing a code 43 and it still idles like ****....to the point of where sometimes i think it might stall out, this is after it is warmed up and driven for 30mins or so....I thought it might be a bad 02 sensor, IACV, possibly TPS, but i understand all these have their own codes...so im not sure what to do...additionally, my injectors are 550cc 4 months old, hondata s100 with boost (4 months old), and obd1 (4months old), and walbaro 255 fuel pump (4 months old),etc...the only thing in my fuel system i have not changed for sometime now is the fuel filter (but i doubt this would make me throw this code and have this particular problem?)...b16a head, b18c bottom end 2000 honda civic si fully built motor at InlinePro arias 9.1 pistons, LS crank, Crower Rods, etc... 12 lbs of boost with conservative timing etc...just looking for any help in figuring out what could be giving me the Code 43, and this Idle problem....any help/suggestions would be apreciated....InlinePro have not returned my call yet....
thanks for your time

 

i bet it starts like a champ when its cold tho.

then after you shut down after a drive it will idle like ****. floor it a bit and it goes away.

am i right?

 

I would try to get it back in with Inline, from the sounds of it, they should stand behind your problem.

 

yep, its all in the tune, take it back to them.

 

when i start it up...it idles between 1500 and 1000 but no major idling problem...i wanted to say, as i forgot....i checked for vacuum leaks...couldnt find anything....coolant is full.....cant think of anything else really...thanks for the help...any other suggestions would be appreciated...
thanks

 

Change the fuel filter then take it back.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">yep, its all in the tune, take it back to them. </TD></TR></TABLE>

Threre really isn't much to tune at idle....that's why I really don't understand why you say that every time someone says their idle is crappy.....

 

theres more than u think

bigger injectors need less time to open, so they are harder to idle perfect.

you need to adjust fuel/ignition along with different loads of the idle. warm up, regular idle, loaded idle (when the fans are on), when the ac is on. ETC ETC ETC.

 

Thanks for all the replies...I think/hope its just a tunning issue...Im just waiting on the owner of InlinePro to call me back...and see what he says...I dont understand because the car was tuned perfectly, now all of the sudden its acting up....Does this happen often?...possibly because of the colder weather?...Im not sure really...
Well, thanks again...any other suggestions welcome

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">theres more than u think

bigger injectors need less time to open, so they are harder to idle perfect.

you need to adjust fuel/ignition along with different loads of the idle. warm up, regular idle, loaded idle (when the fans are on), when the ac is on. ETC ETC ETC.

</TD></TR></TABLE>

Cool thanks - sounds like fun.....

 

code 43 is a symptom of shitty tuning. When the ECU is in closed loop for extended periods of time and fuel trim exceeds a certain value (i.e. the O2 sensor is too lean / too rich for too long) then it sets a code 43. I would be willing to bet that Inlinepro did a good job at WOT and didn't touch the vacuum maps enough.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2000turbosi &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for all the replies...I think/hope its just a tunning issue...Im just waiting on the owner of InlinePro to call me back...and see what he says...I dont understand because the car was tuned perfectly, now all of the sudden its acting up....Does this happen often?...possibly because of the colder weather?...Im not sure really...
Well, thanks again...any other suggestions welcome</TD></TR></TABLE> Just to help you out with time here, I wouldn't wait for them to call you it won't happen well not for a long time.. You will need to get on there case. I believe most tuners are like this..

 

yea i know...i called them 3 days straight...and i got through on the forth...i just bought an 02 sensor...if that doesnt work...ill try another IACV...if that doesnt work...they said bring it back down...and they will take a look at it...thanks for the help

 

If it's not ok afte the O2, take it back. IACV will not cause the problems you have.

 

alright...i actually think it might be the 02 sensor...the new one is on the way....ill let you guys know how it turns out...thanks for the help