DJ420a

As the title stated guys, Ive been trying to kill this acceleration hiccup Im having along with a code 71.

There is absolutely positively no EGR temp sensor anywhere near the EGR valve on my 1992 SC400.

I have totally deleted the EGR system from the car, including the EGR VSV. The only thing Im getting stuck with, is placement of the resistor for the EGR temp sensor.

I am not throwing any other codes

RobPitt

I have an early model SC400 and I've been chasing a code 71 problem. I blocked off the pipe that supplies exhaust air to the back of the intake manifold. I also fabricated and installed blank-off plates under the EGR valve, but kept the EGR valve in place to "look" stock. I have checked or replaced all relevant components including the maf sensor, vacuum control modulator and all the various VSVs. The ECM has also been repaired. Both intake manifold components have been removed and professionally cleaned in a hot bath so there's no obstructions anywhere. The TB has been cleaning too.

What is interesting is that most later 92 SC 400s models and beyond have a different solenoid type of EGR and supposedly an EGR temp gas temperature sensor. I do not see where mine has the EGR temp sensor and it has the older style non-electric EGR valve. So what sends the signal to the computer relative to the exhaust exhaust gas temperature?

The car idles perfectly but it's down on power and displays a TRAC OFF and CEL code 71 lights. Despite clearing the code by removing the EFI fuse, both the check engine light and the trac off lights immediately illuminate upon restarting.

I'm wondering if maybe the throttle position sensor is bad. Thoughts?