Live action from FUMANCHU182.

[jgilj]

Wiles is awesome had it on my 15 no problems whatsoever, smooth like butter!

 

[Unholy707]

when (if) I get another 1 piece it’ll be wiles. Then again I’m running around on stock 2015 axles , 3.70 rear gear and a Redeye driveshaft sending it, maybe around 900whp isn’t enough to break them? Maybe not hooking enough? Almost had a 1.4 60’ with good prep but high tire pressure. 15psi and crap prep hooked then spun a bit

 

[fumanchu182]

Sometimes bad things happen to bad people. I don't count myself as a good guy, lord knows... Well anyway going over some logs we (@Jon-MooredPerformanceLLC and I) were noticing that my passenger side bank would go extremely lean during a pass. Went to today's test-n-tune and made a pass with fresh data. Jon is a life saver, told me to log all the pulse widths... we noticed some really bad things happening:

Injector in cylinder 8 was taking a vacation early. To rewind a bit when driving to the track I popped a p2096 (DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN). After making this pass p0300. These two codes are intimately related. So to see when as far back in the logs this may have been happening (when I wasn't logging each pulsewidth), I took a trip in the time travel machine.

On 3/29 the problem is present, please look at the WB chart (this is when Jon told me to start logging them all):


On 2/26 the issue is present:


This is only during run 1, in the rest of the logs it seems fine (2-4). Log 2 from the same day:


I switched to

Theory of a few competing hypothesis:

• Injector 8 is not able to pulse after a certain time and dies, we can check this with an ohm meter and a few cycles on my testing machine.
  • To remedy this I will be swapping injectors 6 and 8 after fully cleaning both. If the injector 6 pulse width then stops then we know that the issue has been localized and the FIC injector will be overnighted to be replaced.
• If not and cylinder 8 injector stops pulsing that means potentially the injector driver in the PCM is bad. I have two spare PCMs to test with.
• I will be testing the injector harness for continuity. I will find the corresponding pin on the harness and check. If there is no continuity then I know there is a break somewhere in the harness, this is a can of worms but it is what it is if this happens.
• If there is no break in the harness then I will then reach out to my friend who is a SRT/Hellcat tech and ask what the ohms should be and test for that

I'm really hoping for just the injector to be unhappy, I really don't have my new motor yet and I might as well do plugs while I'm in there to see how hot things really got. Already running out of steam for this season and I haven't even gotten to one MSHS event this year.

 

[Unholy707]

Sometimes bad things happen to bad people. I don't count myself as a good guy, lord knows... Well anyway going over some logs we (@Jon-MooredPerformanceLLC and I) were noticing that my passenger side bank would go extremely lean during a pass. Went to today's test-n-tune and made a pass with fresh data. Jon is a life saver, told me to log all the pulse widths... we noticed some really bad things happening:
View attachment 102372
Injector in cylinder 8 was taking a vacation early. To rewind a bit when driving to the track I popped a p2096 (DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN). After making this pass p0300. These two codes are intimately related. So to see when as far back in the logs this may have been happening (when I wasn't logging each pulsewidth), I took a trip in the time travel machine.

On 3/29 the problem is present, please look at the WB chart (this is when Jon told me to start logging them all):
View attachment 102374

On 2/26 the issue is present:
View attachment 102375

This is only during run 1, in the rest of the logs it seems fine (2-4). Log 2 from the same day:
View attachment 102377

I switched to

Theory of a few competing hypothesis:

• Injector 8 is not able to pulse after a certain time and dies, we can check this with an ohm meter and a few cycles on my testing machine.
  • To remedy this I will be swapping injectors 6 and 8 after fully cleaning both. If the injector 6 pulse width then stops then we know that the issue has been localized and the FIC injector will be overnighted to be replaced.
• If not and cylinder 8 injector stops pulsing that means potentially the injector driver in the PCM is bad. I have two spare PCMs to test with.
• I will be testing the injector harness for continuity. I will find the corresponding pin on the harness and check. If there is no continuity then I know there is a break somewhere in the harness, this is a can of worms but it is what it is if this happens.
• If there is no break in the harness then I will then reach out to my friend who is a SRT/Hellcat tech and ask what the ohms should be and test for that

I'm really hoping for just the injector to be unhappy, I really don't have my new motor yet and I might as well do plugs while I'm in there to see how hot things really got. Already running out of steam for this season and I haven't even gotten to one MSHS event this year.

Oh no! Sorry to hear that man, glad you caught it. Glad you noticed it in time, could have been catestophic. Sounds like a real logical game plan to test your theory - should definitely be able to read the plugs to see if it really was running that lean in that cylinder. Can you please share how you were able to add channels /graphs/charts to previous logs? Even if you just want to pm me, I’d really appreciate it. Good luck, and great catch

 

[fumanchu182]

Oh no! Sorry to hear that man, glad you caught it. Glad you noticed it in time, could have been catestophic. Sounds like a real logical game plan to test your theory - should definitely be able to read the plugs to see if it really was running that lean in that cylinder. Can you please share how you were able to add channels /graphs/charts to previous logs? Even if you just want to pm me, I’d really appreciate it. Good luck, and great catch

I have a layout I use, just apply the layout to the logs using the load layout menu.

 

[zhc]

If an injector stops pulsing, it’s usually because the pcm has deemed that there is an issue with that cylinder and shuts it down, like severe misfire detection (related to your p300 code).

As for wideband reading lean, it’ll do that if a cylinder is no longer using up oxygen from burning fuel. All that oxygen hits the o2 and so it starts reading a false lean condition.

What do your “current” misfire counts look like would be my next question, normal drive and wot. Something to keep in mind, misfire detection on these become imperfect as you deviate away from stock power levels and #8 is notorious for picking up false counts.

 

[fumanchu182]

If an injector stops pulsing, it’s usually because the pcm has deemed that there is an issue with that cylinder and shuts it down, like severe misfire detection (related to your p300 code).

As for wideband reading lean, it’ll do that if a cylinder is no longer using up oxygen from burning fuel. All that oxygen hits the o2 and so it starts reading a false lean condition.

What do your “current” misfire counts look like would be my next question, normal drive and wot. Something to keep in mind, misfire detection on these become imperfect as you deviate away from stock power levels and #8 is notorious for picking up false counts.

This is something I will have to add to the logs, I see in the channels the various misfire pids. I'm selecting "history" as I think "current" is a log of at that snapshot in time (over 200 rpm).



Will go for a "coffee" break tomorrow at lunch and see what happens. The motor has 65k on it, maybe 22psi of boost is just too much for it. BTW with a cylinder down. Went 9.6 @ 140mph. 2nd gear launch and down a cylinder. My best 1/8th mile to date.

 

[fumanchu182]

I'm an idiot, you literally quoted "current" misfire counts. @zhc

 

[zhc]

This is something I will have to add to the logs, I see in the channels the various misfire pids. I'm selecting "history" as I think "current" is a log of at that snapshot in time (over 200 rpm).

View attachment 102394

Will go for a "coffee" break tomorrow at lunch and see what happens. The motor has 65k on it, maybe 22psi of boost is just too much for it. BTW with a cylinder down. Went 9.6 @ 140mph. 2nd gear launch and down a cylinder. My best 1/8th mile to date.

If that was your best 1/8th and based on your screen shot earlier, it probably shut down the cylinder after the 1/8 and you were only on 7 cylinders for the back half of the pass, not the whole pass.

As I said, it could just be false misfire counts. The misfire detection algorithm relies on crank acceleration and deceleration events but it's programed based on what a stock motor would do. It can and will start picking up false counts on modified cars.

 

[Jon-MooredPerformanceLLC]

If that was your best 1/8th and based on your screen shot earlier, it probably shut down the cylinder after the 1/8 and you were only on 7 cylinders for the back half of the pass, not the whole pass.

As I said, it could just be false misfire counts. The misfire detection algorithm relies on crank acceleration and deceleration events but it's programed based on what a stock motor would do. It can and will start picking up false counts on modified cars.

It was just on the back half. Around 100 mph it went from perfect to 0 in a blink of an eye.
@fumanchu182 are you getting misfire codes?
I think checking the plugs is the first step

 

[Speedy!]

I was just gonna say the injector shutting off would actually save the cylinder, no fuel no burn right? The worst thing to happen would be a partially firing injector, that would get things nice and crispy.

 

[fumanchu182]

If that was your best 1/8th and based on your screen shot earlier, it probably shut down the cylinder after the 1/8 and you were only on 7 cylinders for the back half of the pass, not the whole pass.

As I said, it could just be false misfire counts. The misfire detection algorithm relies on crank acceleration and deceleration events but it's programed based on what a stock motor would do. It can and will start picking up false counts on modified cars.

Where would you even look in the tune to adjust this? I was looking in my tunes and found these tables related to misfire:

The detection [ECM] 45667 could be sent sky high to the max like 8190 rpm and I'll never reach that RPM, that also sounds kind of dangerous. The Damage Noise Threshold could also be set high but that also sounds kind of dangerous.

The Weighted Misfire and Weighted Misfire Load piqued my interest. These tables seem to take the "current" misfire count and might set a DTC based on count. I definitely think I'd be triggering the one's under Weight Misfire Load. I'm definitely triggering that table:


These are what I'm comparing it against... yeah definitely over the threshold if this is the right table?


What are my options at this point? I can check the plugs and coils. I don't think the injector was the initial issue as discovered. However I can't prevent the PCM from detecting this it looks like unless I move detection RPM to the hell high value and then it will never be detected. Thoughts and advice would be appreciated from any source.

 

[Jon-MooredPerformanceLLC]

You can raise rpm for monitor and detection.but I think there’s a lot to do before you just do this. You are a stock engine no cam. Just shutting it off isn’t my first recommendation.

 

[Speedy!]

Yeah figure out the problem first.

 

[fumanchu182]

Valve covers paid for themselves tonight.
Started

out

Took a piss

 

[BULL]

Valve covers paid for themselves tonight.

?

 

[drag racer]

quick & easy plug access/changes?

 

[fumanchu182]

?

Removed the goofy ass orange valve covers. Manton Hellcovers, still have a baffle but it its not giraffe length anymore.


piston looks better than a year ago, e85 starting to clear the piston head off. Can see the whole serial now and its not fucking orange anymore. Do have some deposits, most likely blow bye.

full send, fuck it, still would appreciate any feedback (dont wanna hear shizz about the dirt on the pistons). Regapping plugs, putting coil in and driving it. Might turn off the misfire detection. If it goes it goes.

 

[fumanchu182]

Cleaned injectors and flow tested #6 and #8. Swapped them. Also swapped coils. If the problem travels to the cylinder the there is a good chance its the coil. If its the coil, I have spares and can swap.

 

[Hickster]

Hey Chewy,
Question concerning break down of pricing, fer myself, on labor and materials. Of, wanting to lower coolant tempt, on a 2018 HC, radiator, HX, resavoir, hoses, tubing to fit. I was going to do 110% of the work. Now that I have had my disabeling set backs. I am able to perform 40% of the labor but have found the shops are going to get their $$ one way or another. I live in Tampa, Fl with heat 300 days a year. Thanks a lot.
Hickster