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Thread: No pulse to #3 code p0203
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05-08-2021 #1
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- Oct 2007
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No pulse to #3 code p0203
LS3 Crate motor, PSI harness and ECU. Car starts and but run throws a p0203. Checked injector signal with node light no pulse header tube is cool on #3
12Volts to the pink wire at injector key on and while running.
I assume the only thing that could cause is this break in the ground side (tan) bad connection to pin 38 on X2 (GRAY) or a bad ECU..
If I am on the right track then Ohm out the tan wire to the pink / black in pin 38? If good then it must be ECU ?From a place you will not see comes a sound you will not hear....
67 Camaro In progress
https://www.pro-touring.com/showthre...-Tap-67-camaro
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