2009 Chevy Traverse AWD 3.6

Hello Everyone,     

I am Cris, I'm extremely happy there's a place a person can go to possibly get help! I have a 2009 Chevy traverse that's been a pain for over a year to try to get it running right! I'm not a master mechanic! I try to learn how to diagnose and fix problems. With this traverse I don't understand it! I had a problem with it. I replaced the timing chain, camshaft phasers, oil pump, all the cam and crank sensors, camshaft phaser solenoids. I keep getting P0335 it would run and die all the time. I ended up replacing the crankshaft plug end wire, but still would run and die! I got tried off trying to figure out why it was always dying! I took it to a mechanic in town to see if he could figure it out. He had it for a while, but didn't get it figured out. I put my scanner on it a few weeks ago. It showed codes with the fuel pump control module. I replaced it with a programmed one. After that it would stay running, the other mechanic had the MAF unplugged. I hooked everything back up MAF everything connected to it, but with everything connected it wouldn't stay running. It just ran a little and die when the MAF sensors plugged in. I tried 3 different MAF sensors, one of them I bought new a few years ago. With every one of them it would run, and die being plugged into vehicle. I tried cleaning them with MAF cleaner to!  I don't get it how all 3 sensors are bad, one of them isn't that old!    

engine running MAF unplugged codes
P0100 mass or volume air flow A circuit
P0113 intake air temperature sensor circuit high.

other codes with it. 
p0089 Fuel pressure regulator performance.  With it running the fuel pressure stayed at 60- 70 psi will running.
P0019 pending correlation between crank & cam exhaust bank 2
P0019 B?
P0008 pending Engine position system bank 1 = I haven't taken out the camshaft phaser solenoids to see if the screens are plugged somehow yet. 
P0017 pending correlation between crankshaft & cam exhaust bank 1 
P0017 B?
P0300 Random cylinders misfires.
P0302 cylinder 2 misfires
P0304 cylinder 4 misfires
P0306 cylinder 6 misfires 

When I did the timing chain, I relaced all new spark plugs and ignition coils, replaced throttle body, thinking it was the problem with the misfiring on bank 2. and the MAF sensor too.  
On my scanner it says IAT is -40, I hear MAF sensor read its information and adjust timing, injectors? I'm not sure if the MAF sensor will cause misfires on bank 2? 

On my scanner I am not reading any camshaft rpm signal my verdict.  I put all new sensors in Cam and crank when I did the timing. I get engine RPM when engine is running but no camshaft rpm. Maybe I need to replace cam sensors? ON my scanner it shows counters for each cam sensor! to me that tells me the sensors are working because of the counter showing for each cam sensor. I just don't get it why the camshaft rpm is not showing on scanner, but engine rpm is. If the computer doesn't see the camshaft rpm, wouldn't it shut fuel and spark down? It runs but misfires on bank 2 with the MAF sensor unplugged, but if plugged in it will run shortly and die! there's no power misfires on bank 2, and because MAF unplugged. There's 12vlts on one pin at the MAF sensor, some volts on another pin, I'm trying to learn how to test the MAF sensors! This is what's happening, any advice would greatly be appreciated!

Thanks for reading this! 
Cris

 

I think you should go after the timing codes first. Make sure that the engine oil is full and clean. Does your scan tool have Cam Timing pids?
Check all of your sensors for a 5v Ref, a good ground, and a signal that toggles 5v/0v as the engine turns.

 

Thanks for ur information! I think these are cam pins ur asking about? I will show u other pic on what I found. I still don't know how to work everything on scanner! Lol

Hello again, I'm adding more pic on what my scanner said. Pics of pins stuff while running.

Thanks 4 looking & help 
Cris

Look for Cam Position pids.

Desired position, Actual position, and a Variance/Deviation pid. These pids will be displayed in ° (degrees).
Also, look for Cam Position Actuator control pids.
 

Is that a Verus scanner. If so, it will be very easy to check your cam timing. Use the 4 channels of the labscope to capture a waveform of all 4 cam signals. Then, put one channel on the crank signal and  2 channels on the Bank 2 cams. Disconnect the Position Actuators when capturing the waveforms. (Sometimes, it is easier to connect the scope leads at the PCM connector, rather than the sensors.)

Then, post a screen shot of the waveforms. Or, even better, post the .vsm files.

Here is a "Known Good" waveform to compare to.


Bank 1 and Bank 2 Intake cams should line up and "stack" with each other. The Exhaust cams have and offset and will not line up/stack with each other.

Hello, 
Thanks for ur information. I have to change oil. It looks bad. I'm sending pics of timing mark on timing I did. I did it 2 times already. Do I have to unplug the camshaft phaser solenoids before recording the wave forms on it?  Thanks for the good know wave forms! I was looking 4 one online! I had it running today, then plugged the MAF sensor in & it died right away? I'm still learning how to capture the wave forms! I tried it at the computer plugs. Timing is a 2:stage job. I didn't it in 2 stages the 2nd time 

Thanks for ur time & information 
Cris

This is rest of pics of timing mark. 2nd stage timing mark. I didn't separate the pics per stages. I'll work on sending u the wave forms soon. I don't know how to send the other video thing yet.

Thanks for ur time & information!
Cris

Hello Dave,

I really appreciate all your help!  I'm new to understanding all this stuff & you helping me become more knowledgeable on things! Thank you!  I changed the oil & filter on the traverse.  I took out each camshaft phaser solenoid & cleaned them; the exhaust bank 1 solenoid was a little dirty, then the intake on bank 2 has some small bits off paint off the marking of chain on it but cleaned then all.  I left them unplugged to do the cam crank correlation wave forms. I'm putting pics of waveforms on here. I don't think I can upload then waveform on here to be able to watch them! I'm adding a pic of the 2 exhausts plus crank, 2 intakes plus crank, bank 1, then bank 2 waveforms. I don't know how to check the wave forms that well! I think the bank 1 timing is in line with how it supposed to be, but bank 2 I'm not sure maybe the intake is off a little? It would be appreciated if someone with more knowledge could look at them. I don't want to have to take it apart again without 100% knowing the timing is off! Still getting codes P0300, P0302, P0304, P0306 all on bank 2?  I have other codes for the intake air temperature and MAF sensor because I leave it unplugged. I don't understand it every time I plug in the MAF sensor it dies right away!???  Disregard pic (Bank 2 intake exhaust crank) I couldn't get it deleted.

      I'm adding pic off the Oxygen sensors, and fuel trim readings. I don't know how to read the volts on the Oxygen sensors, to know if some of them are not working right? I know the short-term reading on each bank are 25 and -25. I know that reading is way to high.  the intake temp reads -40 because it's unplugged & MAF sensor reading is wrong. It will shut it down if I plug it in, but stay running continually if left unplugged? This traverse has been a big pain over the years!!  
Thanks for taking time to read this!I'd really appreciate any advice weather the timing is correct or wrong, or anything you see wrong with the Oxygen sensors.
Thanks!!!

Bank 1 wave forms I didn't get added to last message. hopefully it will be added know. I don't know it seem it won't let me add this one pic to show bank 1 waveform.