[slamster]

I should have noted this... But the short term fuel trim (stft) on bank 1 goes WAY low and actually saturates the sensor (-34%) and the stft on back 2 goes high to 20.7%.

Based on the post I shared in my last post, he was having the same issue and found non-existent primary cats. Wondering if that is my same issue.

I noticed that link didn't work. Here is a bitly to see if it does: https://bit.ly/2SQ5TSw

[Red_Bean_Bun]

Are you JB4 or tune ?

[slamster]

I was on JB4 but uninstalled it this morning. To run MHD, I had to remove. I had the same issue with and without JB4.

[Saif2018]

Originally Posted by slamster

I was on JB4 but uninstalled it this morning. To run MHD, I had to remove. I had the same issue with and without JB4.

Have you tried emailing MHD and tell them about the issues and asking for data log analysis?

[slamster]

Well, looks like I found it. The catalytic converter for bank one is no longer there.... This confirmed my hypothesis with the fuel ratios - the air wasn't escaping...

[slamster]

Okay guys... Last night I removed the secondary Cats from the midpipes. The one on the right had a hole ate through it.

Put the midpipes back in. No luck-- same issue.

I'm about out of ideas. There is a big clunking sound when I WOT near the engine... I am at a loss.

To contact MHD. Do I just send in a contact form or is there a contact I can reach?

[Red_Bean_Bun]

Originally Posted by slamster

Okay guys... Last night I removed the secondary Cats from the midpipes. The one on the right had a hole ate through it.

Put the midpipes back in. No luck-- same issue.

I'm about out of ideas. There is a big clunking sound when I WOT near the engine... I am at a loss.

To contact MHD. Do I just send in a contact form or is there a contact I can reach?

Holes in cats or missing cats are not going to cause misfires.

Have you done a compression or leak down test ?

[Knerr]

This is almost definitely not the issue.... but, if you've recently replaced the VCG, arent coils 1 and 2 on the same ground connector?

If that checks out, I would advise a compression test before throwing any more parts at your car.. the condition of that bank 1 cat is concerning and makes me wonder about the condition of your valves.

[Saif2018]

Originally Posted by slamster

Okay guys... Last night I removed the secondary Cats from the midpipes. The one on the right had a hole ate through it.

Put the midpipes back in. No luck-- same issue.

I'm about out of ideas. There is a big clunking sound when I WOT near the engine... I am at a loss.

To contact MHD. Do I just send in a contact form or is there a contact I can reach?

You can email them and ask for data log analysis...

mhd.tuning@gmail.com

[slamster]

Thanks guys for the help. I sent MHD an email.

An update... I pulled the downpipes out. I got the cats mixed up. Bank 2 Cat was missing. Bank 1 Cat seems mostly fine. I will be putting in some catless downpipes sometime this week.

That's an interesting note about the ground for injectors 1&2. However, I was having this issue before I changed the valve cover. I will certainly check that.

I haven't check compression. Is that just a matter of turning the engine over with a gauge in the plug hole?

Looking at the data file, there are some crazy AFRs... like 235. My coworker with a PHD in diesel combustion said it seems like there is a fuel issue. He suggested looking at the map sensor. Fuel rail pressure fluctuates between 500-900psi and LPFP sensor is at about 72psi.

Boost pressure at idle is -9.5 psi then goes up to -4.5psi under full acceleration.. Isn't this supposed to go positive?

[Knerr]

Originally Posted by slamster

Thanks guys for the help. I sent MHD an email.

An update... I pulled the downpipes out. I got the cats mixed up. Bank 2 Cat was missing. Bank 1 Cat seems mostly fine. I will be putting in some catless downpipes sometime this week.

That's an interesting note about the ground for injectors 1&2. However, I was having this issue before I changed the valve cover. I will certainly check that.

I haven't check compression. Is that just a matter of turning the engine over with a gauge in the plug hole?

Looking at the data file, there are some crazy AFRs... like 235. My coworker with a PHD in diesel combustion said it seems like there is a fuel issue. He suggested looking at the map sensor. Fuel rail pressure fluctuates between 500-900psi and LPFP sensor is at about 72psi.

Boost pressure at idle is -9.5 psi then goes up to -4.5psi under full acceleration.. Isn't this supposed to go positive?

WOAH that rail pressure is CRAZY low. You shouldn't see less that 1500 under WOT

And yes, you should be seeing much higher boost levels.

I'm gonna have to take a look at those logs you posted lol

[Knerr]

Okay, that log you posted is a hot hot mess- most of it was off throttle, 1st gear is too short to get any good data, and it seemed like DSC was kicking in? Idk.

Please do another log in 3rd gear and dont wait a minute to actually start the run. Trigger the log and go WOT immediately with DSC completely off... stay in the throttle 100% until you cant stand it any more or you get to red line.. this will give us a more clear picture of what's going on.

From what I could gather though, your friend is right.. your rail pressure is VERY low.. I think the peak I saw was like 1200 PSI @ 75% throttle.

That is almost 100% why your car isnt targeting boost and why you're having such massive misfires.. I think a healthy HPFP would be over 2000PSI at that point or higher.

[Knerr]

Yeah.. I looked again, I would love to have a more clear picture of what's going on, but based off of that log, I would bet my next paycheck you've got a HPFP issue.

[slamster]

Kneer, seems like you are correct. I didn't think that it was the HPFP because I didn't have long cranks.

I do have very loud clicking from the hpfp but just figured that was normal.

Here is a start up data file:

https://datazap.me/u/slamster/202005...g=0&data=11-22

Basically, it takes a little bit for the hpfp to get up to pressure. Then it only stays at pressure ~2400psi for a little bit then drops back down to about 700psi.

Spending $500 on a hpfp doesn't sounds too appealing but that is likely the issue. I wasn't able to finish putting in the new downpipes on sunday night. Perhaps I can get to it tonight then get a clean data file.

[Knerr]

Originally Posted by slamster

Kneer, seems like you are correct. I didn't think that it was the HPFP because I didn't have long cranks.

I do have very loud clicking from the hpfp but just figured that was normal.

Here is a start up data file:

https://datazap.me/u/slamster/202005...g=0&data=11-22

Basically, it takes a little bit for the hpfp to get up to pressure. Then it only stays at pressure ~2400psi for a little bit then drops back down to about 700psi.

Spending $500 on a hpfp doesn't sounds too appealing but that is likely the issue. I wasn't able to finish putting in the new downpipes on sunday night. Perhaps I can get to it tonight then get a clean data file.

Its definitely a good chunk of change for a maintenance item.. but I think you will be happy to have your car running properly for once!

[slamster]

Yeah... Just ordered it. I've just been chasing this stupid problem for months now. Glad I had a 2nd car.

[slamster]

Well, looks like you owe me your paycheck. Did not fix it. Also, rail pressure still at ~700 psi

[Knerr]

.....you just ordered parts without submitting a full log?
MHD even reached out to review it. I said 5x we need a better datalog to really know what's up...

having said all that.. this confirms there is a fueling issue.

one of two things is true- you have a leak somewhere- injector or otherwise, or you have a bad fuel pressure sensor somewhere.. high or low. Most likely high pressure.

regarding my paycheck, send Paypal info.. Im unemployed so don't expect a lot

[slamster]

Hey, worked on this yesterday. I was able to do some more tests. I also checked the coding for all the injectors. Strangely enough, Cylinder 2 had the wrong values (egg on my face). I fixed the values then took it for another drive. Cylinder 2 was still misfiring however.

I was attempting to log more data but with the new MHD update, i couldn't for the life of me figure out how to log data. I clicked the "ready" button but nothing happened... Restarted everything but to no avail.

I forgot to mention that I swapped the low pressure fuel sensor as well as I was down there.

So I ended up swapping injector 1 with injector 2. (recoding of course...). I went out for a drive and got the following codes:

---------------------------
- DME active codes -
29CC - DME: Combustion misfires, several cylinders.
29CD - DME: Combustion misfires, cylinder 1.
29CF - DME: Combustion misfires, cylinder 3.
29D0 - DME: Combustion misfires, cylinder 4.
29D2 - DME: Combustion misfires, cylinder 6.
29DC - DME: Cylinder injection cutout.
2B2C - Fuel high pressure, plausibility, cold start.

- DME shadow (inactive) codes -
2FCA Fuel high pressure bei Freigabe der Einspritzung
2FDA - Crankshaft sensor, signal: missing.

---------------------------

Interestingly enough, cylinder 2 no longer has a misfire but cylinder 1 does. When I pulled out injector 2, I noticed that there was some oil spray upward onto the bottom side of the spring bar for cylinders 1 and 2. Perhaps this was indicative that cylinder 2 was not seated correctly.

From my person, it seemed to not misfire as soon. It could be placebo.

This is where I am at. They are all index 12 injectors. I just double checked their codeing. The energy comparison values are all correct. But when i enter the flow value, the value is not what I entered but some value near it. Is this typical?

[Saif2018]

Originally Posted by slamster

Kneer, seems like you are correct. I didn't think that it was the HPFP because I didn't have long cranks.

I do have very loud clicking from the hpfp but just figured that was normal.

Here is a start up data file:

https://datazap.me/u/slamster/202005...g=0&data=11-22

Basically, it takes a little bit for the hpfp to get up to pressure. Then it only stays at pressure ~2400psi for a little bit then drops back down to about 700psi.

Spending $500 on a hpfp doesn't sounds too appealing but that is likely the issue. I wasn't able to finish putting in the new downpipes on sunday night. Perhaps I can get to it tonight then get a clean data file.

700 psi is very low, it shouldn't drop below about 1500psi

[JuniorB]

Have you done a boost leak, your chasing fuel, which isn’t the case now that you have replaced everything. You may not be getting enough air, looking at a/f ratios, I’d start looking here.

[IllSic_Design]

Originally Posted by slamster

But when i enter the flow value, the value is not what I entered but some value near it. Is this typical?

Yes, this is normal