Hi Everyone,

I have a 2008 H3 3.7 that threw a rod - Decided on a replacement engine out of a 2007 3.7. Got the engine installed and fired it up.
- Engine has trouble starting and idling for the first two/three minutes and then idle settles down and runs and drives just fine.
-Turn off the engine and start it up again- same problem!
- Threw a Check Engine Light, scanned it with my Vident Tool and it showed P0366. - Camshaft sensor bank 1 exhaust side.- ordered new OEM sensor- Same problem still
- Important to know- Original 2008 engine had 1 Camshaft Sensor on the Exhaust side. My replacement engine is setup with 2 Camshaft Sensors- 10 inches apart.
The original wire harnas has only 1 camshaft sensor connection and the diagram indeed shows just 1 connection for 2008 and 2 for 2007.
Could this cause the problem- and how could it be fixed.
—> Anyone have any idea?
All help is very much appreciated…!!!

Sebastian


2007 Replacement Engine Wiring setup with 2 Camshaft Sensors



2008 Wiring Harnas that is currently in my vehicle with 1 Camshaft Sensor



2007 Replacement Engine with 2nd Camshaft Sensor Location

 

i dont know if it will help but after major engine changes you are supposed to do a crank relearn. using a scan tool.

 

Your 08 Chassis is set to only monitor the Exhaust CSS so the unplugged intake CS sensor should not be the issue.

 

Thank you for your input bronxteck..!!

- I did do the relearn of the crankshaft sensor today but unfortunately it did not change anything on the starting, idling and cam code situation.

I did continue to look through other previous posts and Dylan Rogers mentioned that there are different parts used on the 2007 and 2008 engines that may effect my camshaft sensor problem.

VVT timing sprocket (exhaust side cam sprocket actuator assembly)
-fuel injectors
-fuel rail
-crankshaft position sensor
-throttle body
-intake manifold

Can anyone confirm this?
Any insight is appreciated

 

Doc Old- happy to hear the difference of 1 or 2 camshaft sensors could not be the issue..!!
Trying now to narrow things down -
- Heard it could possibly be different parts in the 2007 and 2008 3.7.

VVT timing sprocket (exhaust side cam sprocket actuator assembly)

What do you think??
Thank you for your input!

 

I am in progress with doing a 3.5 to 3.7 swap in my 2006 H3, during my research I found that there are some key differences between the 2006 and prior 3.5's, and the 2007 3.7's, and the 2008 and up 3.7's. What was relevant to me was that the exhaust cam sensor wiring harness connector for the 2006 3.5 is different from the 2007's connector, the 2007 connector is the same as the 2008 connector. Thus a 2007 exhaust cam sensor will plug right in to the 2008 up harness, I'm just going to have to run a 2006 cam sensor, but a Hall effect sensor is a hall effect sensor so I am not worried about them being electrically incompatible. Where this becomes relevant to you is that the VVT Sprockets are different from year to year.

I believe your issues have to do with the reluctor teeth on the 2007 sprocket being incompatible with what your 2008 computer is expecting,

If you look at the number and placement of the teeth on the 2006 3.5, and 2007 3.7 sprockets you will see that they are of a different physical design, but that the reluctor teeth patterns are the same, two long plateaus and three short plateaus. The 2008 sprocket has two long plateaus and two short plateaus. Therefore the computer for your 2008 is expecting two long pulses on the hall effect sensor and two short pulses, but your 2007 sprocket is giving it two long pulses and three short pulses and all of them at a different relative frequency than it is expecting.

I hypothesize that you will need a 2008 VVT sprocket and you will be right as rain, I can't say that this will solve your problem but it is something to look into. It might also be possible to get the ECU tuned to account for the difference, but ¯\_(ツ)_/¯

Parts cannon engage?

Junkyard databases don't have this level of detail on the engines and generally declare the 2007 3.7 as compatible with 2008 and up engines, but in this case it is only mostly true.

Below is the 2008 3.7 Atlas VVT sprocket, image is from rock auto


Below is the 2007 3.7 Atlas VVT Sprocket Also from rockauto

Lastly below is the 2006 3.5 VVT atlas sprocket

 

Hi I have te same problem with my Hummer H3 and was wondering if the problem is fixed?

at this moment my car sometimes crank but not start after trying more times it starts te error code is P0366 and P0014 with engine ligt in the dashboard, camshaft and crankshaft changed, solenoid cleaned, wire, checked and measures with multimeter, new motor oil, censor
relearned but still the same errors and problems

Kind regards Bert Terlouw

 

Welcome Bert.

We get you have a P0366, but that is not the situation topic in this thread. This Thread is more than Two Years Old and is about an issue related to replacing a 2008 3.7L engine with a 2007 3.7L , so are you telling us that you also replaced your 2008 3.&L with a 2007 3.7L and are then having the same problem? If not, you dug up an OLD THREAD, tacked on an unrelated question, and should have started your very own New Thread with your brand New Question. READ: Old Threads/'Necro-Bumping'

 

hello


I have exact the same problem as the tread discussion started and was wondering if the solution has been found , like the message from user “bonairesurf” my car also have a motorswap from a collorado 3.7 also wit only one position for a camshaft sensor and also start problem with the same code P0366 exactly te same problems and I still looking for the solution, I was hoping to get answer in this thread , because this tread is old the solution is maybe found?

thank you kind regards Bert

 

probably needed the Colorado engine harness and ecu as well. then rewire the harness. or get a 2007 head and cam on there.