Poor Running, Lean Bank 2
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From: So.Cal.
Poor Running, Lean Bank 2 An experiment: keep it in OL using DVT, does it keep running...? And then return control to ECM and see what it does.
You're alluding to ECM being faulty, do you have a spare one to try...?
You're alluding to ECM being faulty, do you have a spare one to try...?
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From: So.Cal.
Poor Running, Lean Bank 2 when it fails to refire does scantool read RPM while cranking, and do you still get spark/spray everywhere...?
And is rail pressure still within spec...?
How about battery voltage wrt to chassis ground and wrt engine ground...?
Does scantool indicate VAT enabling (one of the STATEnn pids)...?
Last edited by joecar; Oct 26, 2015 at 06:18 AM.
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From: SoCal
I do not have a spare ECM. This one worked fine on the last motor and I have not had an error in flashing it but I suggested it because others have had the problem.
This may be tune related (but usually it's the other way around)... but the spark plugs being different is a physical problem...
when it fails to refire does scantool read RPM while cranking, and do you still get spark/spray everywhere...?
And is rail pressure still within spec...?
How about battery voltage wrt to chassis ground and wrt engine ground...?
Does scantool indicate VAT enabling (one of the STATEnn pids)...?
when it fails to refire does scantool read RPM while cranking, and do you still get spark/spray everywhere...?
And is rail pressure still within spec...?
How about battery voltage wrt to chassis ground and wrt engine ground...?
Does scantool indicate VAT enabling (one of the STATEnn pids)...?
I'll double check RPM being read but I am almost certain it is reading during cranking.
Rail pressure is in spec from the moment the key is turned to on to after the engine dies. Not a rail pressure issue that I can tell. I might hook a gauge to the rail if I can get at the fitting (I flipped the rail to clean up the engine bay).
I'll have to get readings at the ground points though they are all perfectly clean and tight.
Not familiar with "VAT enabling (one of the STATEnn pids)." I'll research that a bit.
Thanks Joe!
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From: So.Cal.
VATS (vehicle anti theft system):
when it fails to start, check one of the STATEnn pids (? I think STATE05) to see if the pCM is indicating that VATS has kicked in, which if it did it would prevent starting)(also, I'm not 100% sure how this has been implemented on the 5th Gen Camaro).
when it fails to start, check one of the STATEnn pids (? I think STATE05) to see if the pCM is indicating that VATS has kicked in, which if it did it would prevent starting)(also, I'm not 100% sure how this has been implemented on the 5th Gen Camaro).
Thread Starter
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From: SoCal
Originally Posted by joecar
VATS (vehicle anti theft system):
when it fails to start, check one of the STATEnn pids (? I think STATE05) to see if the pCM is indicating that VATS has kicked in, which if it did it would prevent starting)(also, I'm not 100% sure how this has been implemented on the 5th Gen Camaro).
when it fails to start, check one of the STATEnn pids (? I think STATE05) to see if the pCM is indicating that VATS has kicked in, which if it did it would prevent starting)(also, I'm not 100% sure how this has been implemented on the 5th Gen Camaro).
Originally Posted by joecar
( did you find debris in that one injector...? )
Originally Posted by joecar
When engine dies at temperature, with scantool check ECT and IAT temperatures.
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From: SoCal
Originally Posted by joecar
This may be tune related (but usually it's the other way around)... but the spark plugs being different is a physical problem...
when it fails to refire does scantool read RPM while cranking, and do you still get spark/spray everywhere...?
And is rail pressure still within spec...?
How about battery voltage wrt to chassis ground and wrt engine ground...?
Does scantool indicate VAT enabling (one of the STATEnn pids)...?
when it fails to refire does scantool read RPM while cranking, and do you still get spark/spray everywhere...?
And is rail pressure still within spec...?
How about battery voltage wrt to chassis ground and wrt engine ground...?
Does scantool indicate VAT enabling (one of the STATEnn pids)...?
I have not logged VAT. The "state **" PIDs all say unsupported.
Originally Posted by joecar
( did you find debris in that one injector...? )
Originally Posted by joecar
When engine dies at temperature, with scantool check ECT and IAT temperatures.
Next step is compression test all cylinders. I'll post the results tomorrow if I get it done by then. Thanks.
Travis
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From: So.Cal.
Thread Starter
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It has no compression due to lifters gunked up... It looks like lifters were contaminated and not bleeding off properly which held the valves open. The problem materialized rather quickly and got progressively worse as the engine was run. Ultimately, I ended with only three cylinders having good compression and two that were completely dead. Pulled the heads off Saturday and two of the cylinders looked as though they never even fired. Of course all the extra fuel being dumped in the banks meant those doing the work were super rich. Those pistons were gummed up pretty good.
New lifters are in route as is a PurePower Stainless Steel reusable filter. A lot of folks will say that is a waste of money and it very well could be. Here's why I decided to go this route.
-I've got a buddy who runs them on a road track and swears by them. In the military we use them in a lot areas were filtration performance is a concern.
-Nominal Rating
New lifters are in route as is a PurePower Stainless Steel reusable filter. A lot of folks will say that is a waste of money and it very well could be. Here's why I decided to go this route.
-I've got a buddy who runs them on a road track and swears by them. In the military we use them in a lot areas were filtration performance is a concern.
-Nominal Rating