bigtom388

heres my problem, car got tuned ran great then it started running bad lean at idle and partial throttle and pig rich at wot and not making the right boost which is 18lbs, so we checked for vac leaks and boost leaks none were found, noticed the mani. had some cracks so i replaced it with a ramhorn which is not what it had it had a ebay style one neway thats didnt fix the problem either, so i researched and found some one with the same issue he said it was his map sensor, so my tuner sent us what the map should be reading and we tested mine with a multimeter and it was under what it should be in all scenarios, i bought a brand new one today and still not running right, but i did notice that sometimes at idle it doesnt run as lean as it normally does which is upper 17's it might go as low as 16.2 and up and it does the same at partial throttle, so if anyone can help because i really dont know what else to do im all out of ideas. thinking maybe a wiring issue

bigtom388

not sure if this makes a difference but im running hondata s300 to, i even tried my buddys s300 and it didnt change, amd i just remembered i did put a 3 bar omnipower map in and it idled at lik 14.8-15.4 but it was tuned with a 4bar

crvtectim

Mmm, I think you do need to change the settings in Hondata from 4 to 3 bar. Have you fixed any exhaust leaks between your wideband and turbo?

bigtom388

yea between the turbo and wideband is sealed tight, according to my tuner since it ws tuned on a 4 bar its needs to stay a 4bar, but when i put the 3 bar on it only changed the idle a/f not the partial throttle or boost problem

crvtectim

Right, he told you that because most likely 4 bar was what he selected in hondata's settings. I'm sure an s300 buff will chime in here soon for specifics. Honestly, I know nothing about it lol. I'm on neptune. It has a selection of different map sensors to choose from in its settings.

bigtom388

yea i hear ya man lol but it only has a hondat/omnipower 4bar selection which are the same thing just different names and the only 3 bar i found in there was a neetronics but i had an omnipower on there but i still chose the neetronics and it idled good so that dont make sense either lol its a nightmare, anothere thing is i smell fuel at idle but its running lean on the gauge

bigtom388

update: when im at idle shes running lean im talking 17 and up if i rev it up a lil it sounds like its gonna stall then picks it self back up and af are reading between 14.3-14.8 then if i rev it up again it goes back to lean and i can sit here and do it back and forth, im wondering if the fuel pump may be bad its a walbro 255 and its a few years old, and i forgot to ask but will these air fuels being off prevent me from making proper boost

bigtom388

and another thing i can smell fuel pretty good sitting in the car while the a/f are reading the 14.3-14.8

crvtectim

I don't see a problem with those afr's at idle. What are they at WOT under pressure?

bigtom388

i dont either but like i said if i rev it up they will change back to real lean at idle and stay like that untill i rev it again and in wot they run pig rich like low 10's. and if i i drive it when they are good they a/f just bounce back and forth from mid 13 to 17 at a constant rate but if i drive when they are lean at idle they stay lean partial throttle and the car runs rough and im not making proper boost in either senario

crvtectim

You should get back up with your tuner to see what's happening.