scott90gsx420
10+ Year Contributor
- 603
- 5
- Sep 25, 2010
-
nampa,
Idaho
So i recently noticed my car was running lean in boost above 4500rpm's or so..
I turned boost back to stock and itll hold 10's just fine..
Turned it up to like 15psi and it starts going lean again.. Like late 12-13afr(in boost) and i dont stay in to see if it richens back up..
I cant see why i cant run more boost 18 is the highest ive got it too and that was months ago but people run these injectors(evo 560's) to low 20's..
I understand every car is different but WTF man
.. Boost is rich as boost is coming on then goes lean as hell regardless of my safc settings..
Which are +4 from idle to +14 at 7200rpm/(high throttle map)..
I also have a 2gen mas which is roughly 20% higher air reading then stock.. So i should be at like +4 at 7200 MAX.. I dont understand why i cant run higher boost for one but for two why are the AFC settings so damn high..
My Settings used to be less and i ran higher boost too SO IDK.. My pump sounds fine(loud and whiney)...
Maby fuel filter only thing is that the 2g mas, fuel pump(255), afpr, and the stainless lines are the only mods the car had when i bought it and the car sat for 2 years in a lot befire i bought it..
Guy said it only had a few hundred miles on it before HG blew so i didn't change the filter.. Now i try and cant find the god damn thing..
The plugs look fine(can tell its a bit lean but nothing to bad yet) and it makes no difference if i up my fuel pressure or not..
I watched fuel pressure rise when reving it but it was while under the hood but my gauge is attached to the afpr so i cant watch it while driving.. I am going to pull the hood off tomorrow and make a pull so my brother will be able to watch it then..
Any ideas is much appreciated im going to drive this thing off a cliff soon
I turned boost back to stock and itll hold 10's just fine..
Turned it up to like 15psi and it starts going lean again.. Like late 12-13afr(in boost) and i dont stay in to see if it richens back up..
I cant see why i cant run more boost 18 is the highest ive got it too and that was months ago but people run these injectors(evo 560's) to low 20's..
I understand every car is different but WTF man
.. Boost is rich as boost is coming on then goes lean as hell regardless of my safc settings.. Which are +4 from idle to +14 at 7200rpm/(high throttle map)..
I also have a 2gen mas which is roughly 20% higher air reading then stock.. So i should be at like +4 at 7200 MAX.. I dont understand why i cant run higher boost for one but for two why are the AFC settings so damn high..
My Settings used to be less and i ran higher boost too SO IDK.. My pump sounds fine(loud and whiney)...
Maby fuel filter only thing is that the 2g mas, fuel pump(255), afpr, and the stainless lines are the only mods the car had when i bought it and the car sat for 2 years in a lot befire i bought it..
Guy said it only had a few hundred miles on it before HG blew so i didn't change the filter.. Now i try and cant find the god damn thing..
The plugs look fine(can tell its a bit lean but nothing to bad yet) and it makes no difference if i up my fuel pressure or not..
I watched fuel pressure rise when reving it but it was while under the hood but my gauge is attached to the afpr so i cant watch it while driving.. I am going to pull the hood off tomorrow and make a pull so my brother will be able to watch it then..
Any ideas is much appreciated im going to drive this thing off a cliff soon
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