map sensor
ok so last night were cruising home me and my buddies and thier all speeding and leaving me at the back of the pack so i decide i need to show them what boost is all about!! im in fifth and instead of downshifting i just floor it and man 9lbs of boost jsut feels sweeeeet!!! ;D anyways as soon as i caatch up i get and cel and my car starts sputtering and bogging down , at this point im shitting it and swearing up and down thinking my ---- is blown. so we pulll over and the car is runing rough. its was a code3Map sensor. so i guess my afc settings arent to good. i just reset the ecu and took off like nothing ever happen. i definately got the ---- scared outta me.! anyways 1-4k is at -39%
4500 is -38 5000 is -37 6000 is- 36 7500 is- 35 i was probably arout 5000rpms when this happened, any recommendations on my settings on the safc? here are my specs d16a6, t3, 450cc injectors, walbro255 intank, runing 9lbs ;D, thanks for any tips. |
Re:map sensor
It's like this
At -40% you can boost higher, but it runs leaner than at -35%. with the -40% you are able to boost to 10-11 psi so I thing that setting at -37%is just at the limit for boosting 9 psi....so when hitting 9 psi or higher where you are set at -37% the map will read past 1 bar and the map signal to the ecu will be higher then normal like when boosting without the AFC hack...and giving the CEL. Try to lean it out at 5000 rpm and up begin with -38% and see how much you can lean it out before going lean.. well -40% would be the limit though. |
Re:map sensor
makes sense ill try it ;D
|
Re:map sensor
no problem.
|
Re:map sensor
if your afc is set at -1 at 10psi would it feel like your gettin fuel cut.
|
Re:map sensor
hmmmmm with bigger in jectors you would be fludding your engine...too much fuel and you will get a CEL.
By putting bigger injectors and setting the afc at -40% etc. you're fooling the ecu it will read 1 bar atmospheric pressure from the map sensor when you're at 10-11 psi, bacause the voltage the map sensor sends to the ecu is lowered by 40%, making the injectors deliver less fuel(that's why you need bigger injectors) and fooling the ecu that you're not boosting so you can run boost. |
Re:map sensor
just curious cause im not getting past 5200rpms. it feels like im gettn fuel cut or somethinng between 4800rpms and 5200rpms cant figure out what it is. tried -40 percent and even plus 15 and still at those rpms the car just starts to sputter. any thoughts
|
Re:map sensor
do u have a bigger fuel pump?
|
Re:map sensor
Did it work out RENR?
|
Re:map sensor
You sputter at the same rpms, even when off boost and at part throttle? I'd check my grounds.
|
Re:map sensor
;D holy shiznit!!!! ;D ok this is what i ended up with
hi*** low**** 1000 -39 -40 2000 -39 -40 3000 -38 -38 4000 -37 -37 5000 -36 -36 6000 -36 -36 7000 -36 -36 7500 -36 -36 and wowowowow!!! i got to 12lbs of boost at 6500rpms an no CEL!!! ihope my motor can take the abuse!!!i retarded the timing at the distributor almost all the way and it just pulls strong!!!! thanks for the tips semnos! ;D ;D ;D |
Re:map sensor
;D ha i figured out why i was making so much boost, the dam hose from the turbo to the wastegate slipped off!! 12lbs sure throws you in your seat, nice! but im back to my normal 5lbs, but im gona adjust the wastegate to at least 10psi!. lates. 5lbs just is not the same after youve tasted 12lbs. i can tell this motor is not going to last, oh well....... ;D
|
Re:map sensor
hahahahaha yeah 5 lbs is nothing compared to 12.
No problem. Damn you boosting 12 psi without a CEL, that's nice. |
Re:map sensor
there are other things that can really affect it to; was it really cold outside? In Colorado when we got a nasty snow storm and I was out in my sol I was gaining 5 lbs of boost from it being -10 outside; and even with the AFC hack I couldn't keep the boost controlled :S
If it happens againw hile your driving a little advise is to just turn the key back (like you were going to turn off the car) to the ACC position then turn right back to start. If you do it fast enough you dont have to start the car again and it will pull the ECU out of safe mode. |
All times are GMT -5. The time now is 02:51 PM. |
© 2024 MH Sub I, LLC dba Internet Brands