Hi !

(sorry for my english ! I'm french)

I have an automatic twin turbo SUPRA (1995 ; 36000 km).
The ECU has been reprogrammed (by a swiss company).
I'have installed (with TOYOTA) a turbo timer (Blitz) and an electronic boost controller (Blitz, single solenoid).
I set the gain on 5 and the limiter to 1.2 kg/cm2 (17 psi) and -5.
All the others elements (exhaust, intake, etc.) are stock ones.
If I set the ratio on 60 the pressure reaches 1.1 kg/cm2 = 15.5 psi (1.38 kg/cm2 = 19.5psi with a ratio set on 80) BUT the yellow light of electric breakdown ignites and the ECU cut the ignition for a few second.

According to TOYOTA, it is about a code error 34 which indicates that the pressure exceeds 2 kg / cm2 during more than 2 seconds.
It is impossible because the pressure never exceed 1.38 kg/cm2 (I use a good manometer)

Do you know how to solve this problem ? I could command another probe of measure of pressure to make tests, but it costs about $450.

Thank you very much for your help

Gilbert

you're probably hitting boost cut at around 14 psi. Install a Greddy BCC.

Good Luck, Fernando

Thank you for this advice ! However, I thought that the fact that the computer is reprogrammed was equivalent. Besides, the technical documentation TOYOTA indicates that the alarm starts in 2 kg / cm2 (that is approximately 28 PSI) and not in 14 psi.
If I have no better suggestion, I am going to try, but it's very difficult to buy this equipment in France !
Gilbert

Sounds like fuel cut to me. Call the French company that reprogrammed the ECU. Try the free fuel cut mod to test if that is the case. FFCD.

Mark Tozer
94 Supra
SP74 1060HP+ (no nitrous)
Owner www.suprastore.com

I'm sorry, but I don't understand what means "FREE fuel cut mod" ?