Engine Cutout at full boost?

johnec · 01-22-2015, 02:20 AM

My engine cut out only at full boost as if it is not getting enough fuel. The engine has less than 30k and the wiring harness was replaced by a donor harness less than 15k ago. Problem is new and I'm sure what the problem is, fuel pump, computer, relay??? No mods and rebuilt turbo 20k ago.

mirage83 · 01-24-2015, 11:11 PM

Sounds like you're hitting fuel cut. Are you showing any codes?

johnec · 01-25-2015, 12:41 AM

Engine light is on but no codes flashing, the previous owner said the engine light has always been on and after MANY times in the shop to find the issue with the engine light always being on it has never been able to be turned off. If there is another way to pull codes without looking at the check engine light please let me know.

mirage83 · 01-28-2015, 11:19 PM

Don't suppose your car has the Super Monitor does it? Super easy if it does, but most Supra's don't have it (even 87's and 88's, pretty much the only years it was offered). If not, here's a link to walk you through the process...

http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

johnec · 01-29-2015, 01:06 AM

Quote:

Originally Posted by mirage83

Don't suppose your car has the Super Monitor does it? Super easy if it does, but most Supra's don't have it (even 87's and 88's, pretty much the only years it was offered). If not, here's a link to walk you through the process...

http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

Mine is a 1990 and it has that port shown in the link, I went to look at the port and it looks like it had been hit with battery acid from a car battery that went bad, I need to find a new or used port if possible, I know I can always jump the wires from the bottom of the port but now I am concerned about the condition of the port.... Thank you very much for the link, I will check it out this weekend and see if I can get the info from the link to work.

suprajim · 01-29-2015, 12:36 PM

Quote:

Originally Posted by johnec

I went to look at the port and it looks like it had been hit with battery acid from a car battery that went bad

I think Toyota put a big smear of dielectric grease across the terminals at the factory. Every harness I've had or seen at a junkyard has a white or brownish paste in the terminals. You should not have to clean it all out to jump the terminals and pull codes.

01-22-2015, 02:20 AM	#1
johnec Stock Join Date: Jan 2015 Location: Austin Texas Posts: 6	Engine Cutout at full boost? My engine cut out only at full boost as if it is not getting enough fuel. The engine has less than 30k and the wiring harness was replaced by a donor harness less than 15k ago. Problem is new and I'm sure what the problem is, fuel pump, computer, relay??? No mods and rebuilt turbo 20k ago. __________________ GMC Canyon 2015 (now in driveway) Camaro SS 2013 (now in Garage) Toyota Supra History MKIII Turbo 1990 (now in Garage) MK1 1981 (Wrecked in the 80's) MKII 1984 (Sold in the 90's) MKIII 1986.5 (Sold mid 90's) MKIV 1993 (Wrecked late 90's) 2014 CAMARO SS/ 1990 SUPRA TURBO/ 2007 AVALANCHE LTZ Last edited by johnec; 01-22-2015 at 02:24 AM. Reason: add fact

01-25-2015, 12:41 AM	#3
johnec Stock Join Date: Jan 2015 Location: Austin Texas Posts: 6	Engine light is on but no codes flashing, the previous owner said the engine light has always been on and after MANY times in the shop to find the issue with the engine light always being on it has never been able to be turned off. If there is another way to pull codes without looking at the check engine light please let me know. __________________ GMC Canyon 2015 (now in driveway) Camaro SS 2013 (now in Garage) Toyota Supra History MKIII Turbo 1990 (now in Garage) MK1 1981 (Wrecked in the 80's) MKII 1984 (Sold in the 90's) MKIII 1986.5 (Sold mid 90's) MKIV 1993 (Wrecked late 90's) 2014 CAMARO SS/ 1990 SUPRA TURBO/ 2007 AVALANCHE LTZ

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01-24-2015, 11:11 PM	#2
mirage83 12psi boost Join Date: Feb 2007 Location: Georgia Posts: 359	Sounds like you're hitting fuel cut. Are you showing any codes?

01-28-2015, 11:19 PM	#4
mirage83 12psi boost Join Date: Feb 2007 Location: Georgia Posts: 359	Don't suppose your car has the Super Monitor does it? Super easy if it does, but most Supra's don't have it (even 87's and 88's, pretty much the only years it was offered). If not, here's a link to walk you through the process... http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx