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YOWZZA the initial start to back off of the lift caught Me by surprize. Talk about roaring to life. Instant jump to 1200 rpm and then normal slow settle to 5-600 rpm. Seems like normal noise so far. Probably get a chance to drive tomorrow.
Interesting to note that the AMG developed M156 doesn't employ this variable displacement oil pump solenoid. Another clue that this is a microscopic fuel saving feature from the corporate parts bin.
Interesting to note that the AMG developed M156 doesn't employ this variable displacement oil pump solenoid. Another clue that this is a microscopic fuel saving feature from the corporate parts bin.
I am referring to M156 which is the NA 6.2 V8. M157/M278 share the same architecture and they both have the same oil pump with solenoid.
I know you are referring to the old engine architecture, NA and similar to the M273. Because of your comment, I looked at the fitment for the control valve. If you follow the link for the control valve and check the fitment for all the models, you will see the only V8 5.5L AMG listed is the GLE, no C/E/S/ or SL. The other 63 AMG are the 4.0L V8.
Either an omission in the website, or the 5.5L uses a different control valve, or not control valve at all.
NOTE: the fitment list at FCP Euro is different than the one at MBUSA
I know you are referring to the old engine architecture, NA and similar to the M273. Because of your comment, I looked at the fitment for the control valve. If you follow the link for the control valve and check the fitment for all the models, you will see the only V8 5.5L AMG listed is the GLE, no C/E/S/ or SL. The other 63 AMG are the 4.0L V8.
Either an omission in the website, or the 5.5L uses a different control valve, or not control valve at all.
NOTE: the fitment list at FCP Euro is different than the one at MBUSA
Just seems like an omission in the website. All M278 and M157 have oil control valve (same oil pump). The older NA M273 have a different oil pump and do not have an oil control valve.
The M156 has no relation to any of these engines and was designed from the ground up by AMG. It uses a completely different oil pump with no oil control valve.
So I took the car out for a highway drive today. Outside temps in the upper 30s. As I mentioned before definitely quicker turbo spool and quicker downshifts when passing other cars(not like it was ever a issue before lol). Feels alot more alive now and peppier, just wants to go.
So I took the car out for a highway drive today. Outside temps in the upper 30s.
As I mentioned before definitely quicker turbo spool and quicker downshifts when passing other cars(not like it was ever a issue before lol).
Feels alot more alive now and peppier, just wants to go.
my poney does the same kind of tricks minus the turbos...
-- Now the pedal is very firm & responsive.
When I press on gas, torque pulls harder (that's new!) even without reaching a downshift threshold.
-- Before it would be spongy all the way up to a kickdown. Not so much torque, mostly power above 3000, closer to unrestricted oiling.
-- At Hwy speed it's the same pedal barely open and super responsive like engine is breathing healthy. Its very easy to match traffic speed, hills are like flat, great driveability. 722.9 tranny shift-points are learning improvement, shift executions up/down are as fast/smooth as before.
The intake MAP pressure being more predictable helps ECU/TCU calculate the engine LOAD demand more accurately.
>> All the inter related maps are settling down towards a more responsive rich state... a far cry from mushing gas pedal to squeeze power.
If you like fun with scanner data keep an eye on
- fuel pressures and alternator voltage
- during both cruising and acceleration
- Idle LTFT are bound to improve as Lambda are able to shade burned oil carbon.
So glad this canceled burning oil smell in my garage. Imagine all the intake fumes at dealer with 25 bays
Last edited by CaliBenzDriver; 11-26-2023 at 03:40 AM.
my poney does the same kind of tricks minus the turbos...
-- Now the pedal is very firm & responsive.
When I press on gas, torque pulls harder (that's new!) even without reaching a downshift threshold.
-- Before it would be spongy all the way up to a kickdown. Not so much torque, mostly power above 3000, closer to unrestricted oiling.
-- At Hwy speed it's the same pedal barely open and super responsive like engine is breathing healthy. Its very easy to match traffic speed, hills are like flat, great driveability. 722.9 tranny shift-points are learning improvement, shift executions up/down are as fast/smooth as before.
The intake MAP pressure being more predictable helps ECU/TCU calculate the engine LOAD demand more accurately.
>> All the inter related maps are settling down towards a more responsive rich state... a far cry from mushing gas pedal to squeeze power.
If you like fun with scanner data keep an eye on
- fuel pressures and alternator voltage
- during both cruising and acceleration
- Idle LTFT are bound to improve as Lambda are able to shade burned oil carbon.
So glad this canceled burning oil smell in my garage. Imagine all the intake fumes at dealer with 25 bays
Your mention of “the hills being flat” was also one of my initial impressions. Live in a hilly area, and noticed a drastic decrease in the need to adjust throttle input to maintain a cruising speed through them. 👌🏻
Has anyone been able to disconnect it from the top? I cannot even see it...
If from the bottom, do I need a lift or is it doable with a couple of jacks?
Has anyone been able to disconnect it from the top? I cannot even see it...
If from the bottom, do I need a lift or is it doable with a couple of jacks?
Thanks
If you have small hands u might be able to get it from top, but with the oil lines and other plastic lines upfront, one wrong move and you can crack or break some lines.
You need to remove the front portion under tray. Look for the crank pulley and it's right by it. Can easily get your hand in there. I used 2 ramps and drove the car onto. Plenty of room.
Has anyone been able to disconnect it from the top? I cannot even see it...
If from the bottom, do I need a lift or is it doable with a couple of jacks?
Thanks
I posted a picture of it from the top. Not recommended. Do it from underneath.
X2 on underneath. My lift was occupied so I used ramps and it was not bad. I drove the car yesterday about 60 miles. The lag from a stop is noticeably reduced. In "C" mode shifts are almost imperceptible. In "S" mode I didn't feel a change but the TCU is probably gonna need some time. I feel better knowing oil pressure is not mechanically reduced.
Yeah my shifting seems smoother, even cold. I have tried some manual downshifting as I slow down and even the 2-1 is pretty smooth now. In the past it has been fairly jerky.
Just a thought about the throttle lag. Maybe the engine is given a bit of time to switch to the 2nd stage or high pressure circuit and allow some more flow pre higher rpm.
I haven't pulled the plug yet but I'm tempted.
Just a thought about the throttle lag.
Maybe the engine is given a bit of time to switch to the 2nd stage or high pressure circuit and allow some more flow pre higher rpm.
I haven't pulled the plug yet but I'm tempted.
Bank1 intake is given tighter timing for HPFP to work and base fuel trims are even. Everything else builds on top of this more granular fuel foundation.
The responsive pedal feel is from the ECU new ability to build an honest fuel map. We get it by allowing the engine to adjust for best timings without jitter. No1 piece of junk is economy chain tensioner on low-pressure....
The untested ECU chaos is also implemented on some chassis to create goofy TCU shifts. Advanced debugging is left for savy owners to enjoy.
Last edited by CaliBenzDriver; 11-29-2023 at 05:38 PM.
Bank1 intake is given tighter timing for HPFP to work and base fuel trims are even. Everything else builds on top of this more granular fuel foundation.
The responsive pedal feel is from the ECU new ability to build an honest fuel map. We get it by allowing the engine to adjust for best timings without jitter.
The buggy EVU chaos is also implemented on some chassis to help create goofy TCU shifts.
So would a hard battery reset of let's says 3hrs clear up the adaptions of the ecu/tcu behaviors
So would a hard battery reset of let's says 3hrs clear up the adaptions of the ecu/tcu behaviors
When engine sucks adaptations do to! Recognize the root cause to address it.
Make friend with good ECU adaptations!
Your incentive is to get in a good corner to build up good numbers. It's very interactive - That's what makes this journey fun filled.
You can not just reset your way to A1! Adaptations provide average, from there you progress up/down.
Reboots and resets are only good troubleshooting steps, they cure nothing at all.
You have proof that our MB friends left some unfinished engineering in these chassis. Or actually engineered beyond and then back some.
Some people fight adaptations instead of the cause of poor adaptations.
Troubleshooting for lost performance starts with basic maintenance items:
Tensioners
Lambda upstream
Ignition
That's before any fancywork!
Our abilities to win against the ECU logic are extremely limited. ECU logic is easily upset but works well when you get it in the mood... the happy corner of adaptations.
When you screw with the logic... it detunes the engine. Then you can spend all the ressources you want figuring all the evidence the software is computing with.
I totally appreciate Master Tasos' no non-sense view...
🙏
You can start a different thread and we'll lay down lists and action items outside oil solenoid scope.
Last edited by CaliBenzDriver; 11-30-2023 at 05:44 AM.
It's been about 5 days since I unplugged the sensor and it still feels different (better) than before. Small pedal inputs at low rpm (stop and go traffic) is noticeably smoother. M mode downshift rev-matching is more precise compared to before, it would feel like at certain rpms it would not match the revs as well and feel a little clunky. Overall the MCT just feels much smoother.
Again, I was extremely skeptical this would have any effect on drivability so I am really surprised the perceived improvements are still noticeable. I've done battery disconnects and trans adaptation resets before but this feels different.
Fuel efficiency and emissions are primary concerns. Variable pumps and pressure control solenoids are present in majority of modern vehicles not just Mercedes.
11-25-2023, 01:56 PM
