no pulse to #3 p0203
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Teching In
Joined: May 2008
Posts: 12
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no pulse to #3 p0203 LS3 Crate motor, PSI harness and ECU. Car starts and but run throws a p0203. Checked injector signal with node light no ground pulse. The header tube is cool on #3
12V to 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 ?
12V to 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 ?
Last edited by etrexny1; May 9, 2021 at 07:53 AM.
Thread Starter
Teching In
Joined: May 2008
Posts: 12
Likes: 0
Verified continuity to Computer..
Back probed ecu with test light I Saw it grounding.. #3. .. Cleaned everything put noid light BACK on Now number 3 is Firing
Still see no color on #3 header tube.. pulled plug.. found crack in Porcelain, replaced plug color on header tube.
I am Now working on a new 02 sensor code.
Back probed ecu with test light I Saw it grounding.. #3. .. Cleaned everything put noid light BACK on Now number 3 is Firing
Still see no color on #3 header tube.. pulled plug.. found crack in Porcelain, replaced plug color on header tube.
I am Now working on a new 02 sensor code.
Last edited by etrexny1; May 9, 2021 at 01:11 PM.
