Ap1 supercharged SOS suddenly lost lots of power!!!
Joined: Oct 2008
Posts: 4,805
Likes: 15
From: St.Petersburg/Tampa, FL
What’s up guys so here’s what I got so far I am boosting at 9.6 psi on 10 psi pulley at 8900 rpm which is ok, map sensor reading ok, visually inspected everything piping and belt tension all ok! I noticed when I floor it get extremely rich down to 10 which is as far as my gauge reads may be even richer which explains my power loss, I can hear the engine tone change at 4500 which is my vtec engagement so sounds like vtec is working checked plugs and gapped at .022 can it possibly be a bad map sensor causing me to run rich and also at idle car bounces between 13.8 and 16 sometimes! Mods list are sos stage 2 is 1000 Waldroop 255 q300 70 mm throttle body running 10 psi pulley on haltech pnp Also if it was a bad map sensor wouldn’t car run like crap ? I did pull and blow on it and car was a bit more peppy
Joined: Feb 2017
Posts: 153
Likes: 27
From: Ohio
My N/A 01 Accord was doing something similar; down on power, running rich, no codes.
Logged MAP sensor output, it would jump from normal vacuum to boost at idle or driving. Whenever it read wrong the motor would add too much fuel causing lower power. A different MAP sensor solved the issue.
Could be a sensor going bad, datalogging might help you find which.
Logged MAP sensor output, it would jump from normal vacuum to boost at idle or driving. Whenever it read wrong the motor would add too much fuel causing lower power. A different MAP sensor solved the issue.
Could be a sensor going bad, datalogging might help you find which.
Community Organizer
Joined: Jun 2007
Posts: 31,070
Likes: 566
[QUOTE=Nick2t1me;24370651]So update !! It seems I’m running very rich at WOT at all rpms running at 10 on gauge could possibly be lower , also smelling gas which explains the odor. QUOTE]
Don't fuel wash your motor! Stop driving the car until you can address this. You would be smart to drain the oil as well once you get resolved. Don't keep running the car on engine oil that's contaminated with fuel, you will kill your rings and bearings.
Don't fuel wash your motor! Stop driving the car until you can address this. You would be smart to drain the oil as well once you get resolved. Don't keep running the car on engine oil that's contaminated with fuel, you will kill your rings and bearings.
Thread Starter
Joined: Jan 2016
Posts: 70
Likes: 0
[QUOTE=s2000Junky;24371243]
thanks for the heads up but I haven’t been driving it drove it twice and when the situation surfaced she’s been parked and under diagnosis ! But I think the problem is the primary 02 sensor
So update !! It seems I’m running very rich at WOT at all rpms running at 10 on gauge could possibly be lower , also smelling gas which explains the odor. QUOTE]
Don't fuel wash your motor! Stop driving the car until you can address this. You would be smart to drain the oil as well once you get resolved. Don't keep running the car on engine oil that's contaminated with fuel, you will kill your rings and bearings.
Don't fuel wash your motor! Stop driving the car until you can address this. You would be smart to drain the oil as well once you get resolved. Don't keep running the car on engine oil that's contaminated with fuel, you will kill your rings and bearings.
Thread Starter
Joined: Jan 2016
Posts: 70
Likes: 0
So far update I wired my wideband into haltech to run off of wideband closed loop and still having the issue , idle is still bouncing on afr and 10 on WOT . I noticed today with the car turned on at ignition power only (no engine running) and haltech ecu manager on and found that map sensor is reading .4 psi very strange but when car is idling it reads 19-20 inches of vacuum. Could ecu be dumping fuel due to the .4 psi offset? But on data log map and manifold pressure reading equally.
Joined: Oct 2008
Posts: 4,805
Likes: 15
From: St.Petersburg/Tampa, FL
So far update I wired my wideband into haltech to run off of wideband closed loop and still having the issue , idle is still bouncing on afr and 10 on WOT . I noticed today with the car turned on at ignition power only (no engine running) and haltech ecu manager on and found that map sensor is reading .4 psi very strange but when car is idling it reads 19-20 inches of vacuum. Could ecu be dumping fuel due to the .4 psi offset? But on data log map and manifold pressure reading equally.
Thread Starter
Joined: Jan 2016
Posts: 70
Likes: 0
Yup so I got the car tuned and everything was running great and then all of these problems surfaced slowly so I don’t think it’s a calibration issue I have a feeling the map sensor is no good I will check with my meter tomorrow.