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In need of good crank cam correlation waveform

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Old Oct 25, 2025 | 12:03 PM
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Default In need of good crank cam correlation waveform

2001 camero, 5.7, a gang of idiots messed this car up bad and it's my job to fix it. I've got backfires through the intake. Does this timing look correct? I need a good waveform.


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Old Oct 25, 2025 | 11:06 PM
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I'll see if I can find one, but I can tell the answer is no that's not right,

What is channel one hooked up to? Crank or cam? I'm guessing cam.

But regardless, channel 2 is not doing anything.
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Old Oct 25, 2025 | 11:13 PM
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On that scanner, when you go to component test, normally at the end of the instructions on where to place the leads, it should give you an image of a "known" good waveform.

No, it's not going to show crank/cam correlation "unless they have added that specific test" , but I would look at each test individually first to give you an idea of what each should look like.

As of right now, I don't think you have a crank signal. If it's stock, It has a 24x crank and a 1x cam signal.
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Old Oct 26, 2025 | 09:44 PM
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FYI 4th post has some 24x/1x images

https://forum.efilive.com/showthread...l=1#post135119
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Old Oct 28, 2025 | 09:05 AM
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Default Thanks for the replies.

So my time base wasn't long enough to show you guys the whole cam sensor, the timing is right. The coil packs were on their rails when given to me and the harness was backwards on both sides. Thanks again.
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