Keep on getting boost cut or misfire with anything above 20 psi
Jan 12, 2018, 03:29 AM
#16
Evolving Member
Thread Starter
Jan 14, 2018, 01:53 AM
#17
Evolving Member
Logs seem OK.
I see a 1-2 counts of knock in the WOT log you put up.
Can you log WOT with only rpm, timing, tps, wideband, knocksum, inj pulse width and injector duty cycle?
Your AFRs seem on point as well.
New plugs must be gapped.
I see a 1-2 counts of knock in the WOT log you put up.
Can you log WOT with only rpm, timing, tps, wideband, knocksum, inj pulse width and injector duty cycle?
Your AFRs seem on point as well.
New plugs must be gapped.
Jan 14, 2018, 04:27 AM
#18
Evolving Member
Thread Starter
yeah i can log that .the car has been running for 3 days now at 24.5 psi boost without cutting out but there's a weird thing happening in an intermittent way sometimes i push the throttle all the way down but car doesnt do anything until i take my foot off and push it again
Feb 27, 2018, 12:17 PM
#19
Evolving Member
Thread Starter
wanted to update that thread as im still facing the issue log attached at end of it hit 24 psi of boost with 17 counts of knock at 17 AFR!!
Feb 27, 2018, 01:33 PM
#21
TPS hit 100% on some of these. Air Volume is all over the place. What turbo do you have?
new logs with afr uploaded but car did not want to cut or hesitate I reached 24 psi and car was going without encountering anything at all but im seeing recently a rich idle that goes down all the way to 11.2 sometimes its not stable anymore my idle is always falling into 12.5 and lower
Feb 27, 2018, 02:11 PM
#23
I'm new to reading datalogs. You may want to research the HTA 71 and why it now comes with an antisurge housing. I recall airflows would stop for a slipt second because engine couldn't draw it in. That caused flow meters to read very low airflows. This could be your problem.
Is your compressor housing equipped with antisurge?
Is your compressor housing equipped with antisurge?
Feb 27, 2018, 02:36 PM
#24
Look at your AirVolume readings as AFR was climbing. My guess is that your ECU read low air volume and was switching to normal driving mode to conserve fuel (look at timing advance going too 11 degrees as it registered a lot of knock and then pulled timing. Your wastegate duty cycle is all over the place too (probably reacting to erratic AirVolume).
This is my best guess. Turn your boost down until you fix this problem before you blow your engine.
This is my best guess. Turn your boost down until you fix this problem before you blow your engine.
Feb 27, 2018, 10:49 PM
#26
Evolving Member
Thread Starter
Look at your AirVolume readings as AFR was climbing. My guess is that your ECU read low air volume and was switching to normal driving mode to conserve fuel (look at timing advance going too 11 degrees as it registered a lot of knock and then pulled timing. Your wastegate duty cycle is all over the place too (probably reacting to erratic AirVolume).
This is my best guess. Turn your boost down until you fix this problem before you blow your engine.
This is my best guess. Turn your boost down until you fix this problem before you blow your engine.
Last edited by Evo8life; Feb 28, 2018 at 12:49 AM.
Feb 28, 2018, 07:47 AM
#27
Also, log a few runs at 20 psi and see how that looks.
Last edited by 2006EvoIXer; Feb 28, 2018 at 08:16 AM.
Feb 28, 2018, 10:22 AM
#28
Evolving Member
Thread Starter
For now, set your boost limit to 20 psi. Research to look for other potential causes. Get in touch with an experienced tuner to read your logs. If you can find a cheap antisurge compressor housing for your turbo, buy it and see if it fixed your problems. GL
Also, log a few runs at 20 psi and see how that looks.
Also, log a few runs at 20 psi and see how that looks.
Feb 28, 2018, 01:30 PM
#30
Evolving Member
Thread Starter
I only have surge at light throttle in high gears i will be swapping MAF this saturday to see what happens