Please help ca.r wont rev past 3rpm after first gear
 

Recently this week my 93 supra tt auto started to not rev pas 3rpm after it shifts from the first gear.On the first gear i am able to get to 7rpm but after that it doesnt rev past 3 rpm. It feels like i would have a cut off or it goes on limp mode. My dad is coming to scan for codes but i wanted to know if somone had a problem like that before. My upgrades are straight pipe FMC and intake and blitz blow off. Any help is much appreciated. Thank u

First, sorry for the delayed response. If your Supra is still having the problem, it sounds like a boost leak to me...like a blown intercooler coupling for example. A small tear or partially-slipped clamp on the back-side would be hard to see, and would only leak during hard boost - which would throw the ecu into limp mode when boosting...but could seem to behave somewhat normally when not boosting.

To troubleshoot, just pressurize your entire charge-air system to about 20psi. You'll hear the leak.

Thanks for the reply well scanned my codes had a code 42 fixed that one. But then had a code 64 from my tranny wich means solenoid valve 2, ECU, or short circuit. checked both my solenoid they both worked now its my ecu the problem or my wiring.

Carefully inspect the pins in the ecu harness. A friend's Supra had a pin that had come loose, and had partially slipped back into the connector.

You should be able to use a multimeter to diagnose any other issues with the harness/wiring.

Ok thanks a lot will do and ill post back when I find what it was. Thank u for the help