Trying to verify cam/crank
At a friend's shop, helping him look at a GMC, wondered if anyone had a known good cam and crank for this vehicle , capture was taken at cold idle with vtc solenoid plugged in. Thanks for any help.
Here is a known good for a 2008 2.9. No clue if the VVT solenoid is plugged in or not. Your capture is definitely retarded compared to this one though. However since exhaust cams usually retard when phased the known good may be with it unplugged. Id have you friend get another capture with the VVT solenoid disconnected and compare.
Im sorry, I dont know what happened to those file when I attached them. I cant delete the message or remove them. Let me try again.
How sure are you that this is a 2007 with a 2.9? I think you're scoping a 2006-older truck with a 2.8 (inline 4).
The 2006-back Atlas engine used an inductive CKP (sine waveform), hence my prior post/observation. While they are hall effect, your capture's short duration CMP transitions are narrower than the short duration CMP transitions on the 2007-up 2.9 as well. It appears that the two styles have similar signatures and alignments but they aren't exactly the same for obvious reasons. Comparing what I…
Waveform from 08 Canyon 2.9 i found on iATN, hopefdully this helps. [FILE-REMOVED]
thank you Caleb, your file did help in determining that his customers timing was not correct. Thanks a bunch again
No mention of your stated vehicle not matching your waveform details or the supplied waveforms not being the same?
Tony, Sorry for not being as detailed with the final reply. But unfortunately I didn't have much “control” or “play” in this one here, much less any hard time “invested." This was asked of me from my friends shop on short quick notice. But as far as your question on “the stated vehicle”…. yes it is or was a 2007 model year, I asked him to recheck and he did and he told me the sticker under the…
That's strange about the CMP reluctor tooth spacing difference and hall vs inductive CKP. I don't have one to check but did my research on SI and -06 2.8L vs 07- up 2.9L waveforms. I don't know what to say. Posted waveforms are at the mercy of the uploader for accuracy and there aren't enough available to represent the entire build date range fully. But I expect SI to list options or build date…
Yeah, I believe they ended up pulling the solenoid and it had screen blocked with debri, so installed new one and changed the oil and filter. They unfortunately did not re-take a capture after the solenoid replacement, but they could tell me that it did make a difference on how it started and ran at idle, which I guess at that point, for them, “was good enough" to return to the customer. Thanks…