Engine load % wack

avioni · 11-15-2022, 02:39 PM

Having an issue on 7 speed auto 370z where engine load sometimes is way high and sometimes normal, causing the ecu to use the wrong tables and causing all sorts of problems like trans not engaging proper gear or sliping or heavy shift when not needed, knocking, loss of power ect... any ideas why or what would cause engine load % to be erratic? Can't tune properly while this is going on. There are no codes.

vtec to vvel · 11-15-2022, 03:34 PM

Is it anything like the symptoms in the thread below?

370z AT loud thunk sound...

vtec to vvel · 11-15-2022, 03:36 PM

And what mods have you done to the car?

avioni · 11-15-2022, 03:47 PM

Quote:

Originally Posted by vtec to vvel

Is it anything like the symptoms in the thread below?

370z AT loud thunk sound...

No,not at all, no weird noises from trannny. The issue is with ecu calculating engine load % all over the place. At least thats what my tuner tells me. But why its doing so is what i need to know

avioni · 11-15-2022, 05:01 PM

Its felt off and on randomly since nearly stock after installing testpipes and rev9 exhaust. A short time after that i noticed for the first time the car would kinda fall flat on power at 3k instead of starting to pull while cruising. Some days it felt fine. After this i met the tuner who suggested it could be tune. So i waited till i had stillen gen 3 intakes, and isr long tube headers to go tune which I did but the car still felt ornhad the same symptoms. Ever since i have replaced all coils, sparkplugs, compression checked fine, no vacuum leaks. As it sits tye car has isr headers, invidia n1 exhaust, walbro 525 hellcat, id 1050 inyectors, Last week i installed a SC kit and while the tuner is sending me tune files he mentions the engine load % is going crazy and causing the tables to switch to wrong tables at any given time so tuning is impossible like this.

THE BULL · 11-16-2022, 12:17 PM

Dimelo Bori.

One thing that could be causing this could be your Gallery gaskets or VTCs.

I'm following a slightly broken gasket or bad VTCs and the engine load goes all over the place until they start behaving.

Have your tuner check your VTC and VVEL angles as the engine loads start to get crazy to see if he see's any weird angles.

The fact that this problem continued after a flash/tune could point to something mechanical and realistically there's not many engine issue that would make the Load % act like that.

avioni · 11-19-2022, 06:04 PM

Quote:

Originally Posted by THE BULL

Dimelo Bori.

One thing that could be causing this could be your Gallery gaskets or VTCs.

I'm following a slightly broken gasket or bad VTCs and the engine load goes all over the place until they start behaving.

Have your tuner check your VTC and VVEL angles as the engine loads start to get crazy to see if he see's any weird angles.

The fact that this problem continued after a flash/tune could point to something mechanical and realistically there's not many engine issue that would make the Load % act like that.

i am waiting on new maf sensors, moncef said they where spiking and where to blame so hopefully thats it. will tell the tuner to check the vtc and vvel angles

11-15-2022, 02:39 PM	#1 (permalink)
avioni Base Member Join Date: Jan 2022 Location: PR Posts: 22 Drives: 370z 7 speed Rep Power: 3	Engine load % wack Having an issue on 7 speed auto 370z where engine load sometimes is way high and sometimes normal, causing the ecu to use the wrong tables and causing all sorts of problems like trans not engaging proper gear or sliping or heavy shift when not needed, knocking, loss of power ect... any ideas why or what would cause engine load % to be erratic? Can't tune properly while this is going on. There are no codes.

11-15-2022, 03:34 PM	#2 (permalink)
vtec to vvel A True Z Fanatic Join Date: Feb 2015 Location: 813 Posts: 3,909 Drives: 13 Z Rep Power: 502909	Is it anything like the symptoms in the thread below? 370z AT loud thunk sound... __________________ Don't like what I post? Too bad. I really don't give a sh!t

11-15-2022, 03:36 PM	#3 (permalink)
vtec to vvel A True Z Fanatic Join Date: Feb 2015 Location: 813 Posts: 3,909 Drives: 13 Z Rep Power: 502909	And what mods have you done to the car? __________________ Don't like what I post? Too bad. I really don't give a sh!t

11-15-2022, 05:01 PM	#5 (permalink)
avioni Base Member Join Date: Jan 2022 Location: PR Posts: 22 Drives: 370z 7 speed Rep Power: 3	Its felt off and on randomly since nearly stock after installing testpipes and rev9 exhaust. A short time after that i noticed for the first time the car would kinda fall flat on power at 3k instead of starting to pull while cruising. Some days it felt fine. After this i met the tuner who suggested it could be tune. So i waited till i had stillen gen 3 intakes, and isr long tube headers to go tune which I did but the car still felt ornhad the same symptoms. Ever since i have replaced all coils, sparkplugs, compression checked fine, no vacuum leaks. As it sits tye car has isr headers, invidia n1 exhaust, walbro 525 hellcat, id 1050 inyectors, Last week i installed a SC kit and while the tuner is sending me tune files he mentions the engine load % is going crazy and causing the tables to switch to wrong tables at any given time so tuning is impossible like this. Last edited by avioni; 11-15-2022 at 05:03 PM.

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11-16-2022, 12:17 PM	#6 (permalink)
THE BULL Base Member Join Date: Apr 2021 Location: Florida Posts: 217 Drives: G37S Rep Power: 26848	Dimelo Bori. One thing that could be causing this could be your Gallery gaskets or VTCs. I'm following a slightly broken gasket or bad VTCs and the engine load goes all over the place until they start behaving. Have your tuner check your VTC and VVEL angles as the engine loads start to get crazy to see if he see's any weird angles. The fact that this problem continued after a flash/tune could point to something mechanical and realistically there's not many engine issue that would make the Load % act like that.