2011 Buick Regal CXL — P0336
Vehicle has long crank, runs rough. Scope shows crank signal at sensor and ECM. Not showing RPM in ECM data. Signal wire tests good from sensor to ECM. Crankshaft resync counter showing 37. Hate to just throw sensor at it when I'm not seeing cause??
have you checked the code set criteria? What does the cam and crank sensors signals look like, and are they properly aligned?
I will scope cam to crank tomorrow.
Although the signal is present , does it reach full amplotude? What does the DTC dictate? Is it a circuit code?
Code criteria states, not present or not correct count. I am using scope on scanner and tried to count terth, it looks funky. I don't see 58 and 2 dead. More like 26 and 2 dead. I'll be doing more testing tomorrow
GM is very good at giving you the code set criteria. Once you know that information, most of the searching for the problem is now gone, and you can go right to the problem and test it. Get the needed waveforms and you will have the problem nailed to the floor.
If your scope is a Pico, can you please post the PSD file! This capture is from a good 2012 Equinox 2.4
I'm using 4 channel scope on scanner,
You need to scope the cam and crank sensors for signal quality/amplitude etc. Also very important to compare to a known good to check the timing. You do this and you will find your issue.
Channel 1 - Crank Channel 2- Intake CMP Channel 3- Exh CMP I have nothing to compare it to , thank you guys for all the help! I think that Crank looks weird. This is a 2011 Buick Regal with a 2.0 Turbo , 6 Spd Manual Trans
Awesome, there is the problem. This crank reluctor is 60 tooth -2 teeth for 360° and TDC. I count about 27 teeth from the left side till we see what looks like severly damaged or missing teeth. Make sure the damaged portion occurs every 360°. If so the reluctor has a problem.
Ever done one on these? better to just find a low mileage Engine?
Do you have a Service info source? Honestly man , I have no idea. I avoid engine work as much as possible. But being as the reluctor is part of the crankshaft and the crank has to be removed to replace it, Id assume probably cheaper to just put another engine. However the 2.0 is not as popular as the 2.4. Don't know how many are out there.