Loosing 100 hp and running lean at WOT
Oct 21, 2013, 08:28 AM
#1
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Loosing 100 hp and running lean at WOT
So the other day I noticed that my car leans out to 14.5ish at WOT!!!! Also usually 2nd 3rd or even 4th gear after 5000rpms the car feels like its hesitating and studdering a lot. During some logs I emailed my tuners to show him the logs and he said im loosing almost 100hp!! i checked all hoses to see if something popped off and i see nothing. At idle my boost gauge is anywhere from around -22-24. BUT at WOT i see my boost gauge jumping back and fourth between 20lbs and 26lbs instead of holding it at a steady 25/26lbs which is weird. Mods on the cars are
-ef2 turbo
-fic 900cc
deathshwerks 65c fuel pump
ets intake/fmic/uicp/licp
hks bov
UR TBE
-ef2 turbo
-fic 900cc
deathshwerks 65c fuel pump
ets intake/fmic/uicp/licp
hks bov
UR TBE
Oct 21, 2013, 09:12 AM
#3
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will do when i get home from work. But i just spoke to drew from MAp. he said that it could be cause the stock wiring for the fuel pump could not be enough and that i should have the fuel pump hard wired directly to the battery.
Oct 21, 2013, 09:26 AM
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i guess since im running a certain amount of power??? no idea that's what i was just told on the phone plus i already havea new Black ssp fuel pump relay
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Oct 22, 2013, 08:16 AM
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I use a DW65c in my setup and it's currently working perfectly fine. Though, I also use bigger injectors (ID1000) and a Boost Control Solenoid. If there's a problem with your fuel pump, then it'll be with the installation or possibly with the pump itself.
What you described, sounds almost like the ECU detected over boost and performed a boost cut to protect from bad things happening. Depending on the intervals used and the correction %'s applied, it can be a pretty drastic amount of boost that gets cut when the ECU detects "above target" pressures.
The leaning out bit is a little puzzling, but depending on where you are in the fueling maps, there is potential for it to lean out when you suddenly drop to much lower "load" cells, which would happen in sudden boost cut.
What you described, sounds almost like the ECU detected over boost and performed a boost cut to protect from bad things happening. Depending on the intervals used and the correction %'s applied, it can be a pretty drastic amount of boost that gets cut when the ECU detects "above target" pressures.
The leaning out bit is a little puzzling, but depending on where you are in the fueling maps, there is potential for it to lean out when you suddenly drop to much lower "load" cells, which would happen in sudden boost cut.
Oct 23, 2013, 10:18 PM
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thanks guys ill try another boost leak test this week. But could there really be a boost leak if im still hitting boost perfectly fine. Also i sent the logs over to the tuner. I tell him to check the injector duty cycle. But how do i go about checking the wastegate