Fuel Cut off At 4k RPM

Temecula Mk3 · 02-14-2011, 05:34 AM

I have a freshly rebuilt 7MGTE in my mk3 and whenever i get on the gas my engine gets to 4000 rpm and has a fuel cut off. How can i set it so it cuts off at a higher rpm? or just turn off the fuel cut?

btwilson86 · 02-14-2011, 05:39 AM

Fuel cut is there to protect you, by eliminating or raising fuel cut you're just covering up a problem and can cause some serious problems for your engine.

Are you running a stock setup or do you have some mods?

Temecula Mk3 · 02-14-2011, 05:48 AM

it has some mods on it, i have a BOV vented to the atmosphere an upgraded turbo Greddy 3in exhaust and some other engine work.
but it's not tuned and it cuts out at 4k but i don't redline until 7k

btwilson86 · 02-14-2011, 05:54 AM

Sounds like you need some sort of fuel controller, or to install a boost controller and turn down the boost. You can do the Lexus AFM and 550's to trick the computer, but that's not an exact science. Your best bet is a fuel controller, as this will give you much more fine tuning and will yield greater (and SAFER) power potential. In another thread cre recommended to another member the Apex'i SAFC-II, Neo (it's successor), MAFT Pro, or you could go standalone EMS. I'd say do some research on the different systems and find one that meets your goals.

Temecula Mk3 · 02-14-2011, 06:00 AM

I have a boost controller installed but im not sure how to set it so it wont cut

btwilson86 · 02-14-2011, 06:11 AM

You would turn down the boost to a safe level. IIRC that's somewhere around 12 or 13 psi

Temecula Mk3 · 02-14-2011, 07:08 AM

okay thanks i'll try to set it

02-14-2011, 05:34 AM	#1
Temecula Mk3 Stock Join Date: Feb 2011 Location: Temecula Posts: 6	Fuel Cut off At 4k RPM I have a freshly rebuilt 7MGTE in my mk3 and whenever i get on the gas my engine gets to 4000 rpm and has a fuel cut off. How can i set it so it cuts off at a higher rpm? or just turn off the fuel cut?

02-14-2011, 05:39 AM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Fuel cut is there to protect you, by eliminating or raising fuel cut you're just covering up a problem and can cause some serious problems for your engine. Are you running a stock setup or do you have some mods? __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

02-14-2011, 05:54 AM	#4
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Sounds like you need some sort of fuel controller, or to install a boost controller and turn down the boost. You can do the Lexus AFM and 550's to trick the computer, but that's not an exact science. Your best bet is a fuel controller, as this will give you much more fine tuning and will yield greater (and SAFER) power potential. In another thread cre recommended to another member the Apex'i SAFC-II, Neo (it's successor), MAFT Pro, or you could go standalone EMS. I'd say do some research on the different systems and find one that meets your goals. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

02-14-2011, 06:11 AM	#6
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	You would turn down the boost to a safe level. IIRC that's somewhere around 12 or 13 psi __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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02-14-2011, 05:48 AM	#3
Temecula Mk3 Stock Join Date: Feb 2011 Location: Temecula Posts: 6	it has some mods on it, i have a BOV vented to the atmosphere an upgraded turbo Greddy 3in exhaust and some other engine work. but it's not tuned and it cuts out at 4k but i don't redline until 7k

02-14-2011, 06:00 AM	#5
Temecula Mk3 Stock Join Date: Feb 2011 Location: Temecula Posts: 6	I have a boost controller installed but im not sure how to set it so it wont cut

02-14-2011, 07:08 AM	#7
Temecula Mk3 Stock Join Date: Feb 2011 Location: Temecula Posts: 6	okay thanks i'll try to set it