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Here are some reponses I published on another forum ...figured it made sense to keep up to date on my findings:
Thanks for all the comments. So I'll try to clarify some of the questions.
One major thing that made a significant improvement is that I found I had not properly connected the oil filler tubes (I need to fire the mechanic ). I believe I was getting a huge air leak at that point. With connecting it, things have really improved. The vehicle “feels” much smoother at all speeds. However I still get the CEL pending but not as often. And after some driving, and letting it idle it does not trigger.
To clarify, on the initial freeze frame data I published. I see the same when FF when the engine is at 190F. The STFTs plots I published were when the car was at temperature (+190). On whether the tool measures absolute, I'm not sure. I’m using the OBDwiz tool with ELM adapter, so I did not spend a lot for the tool. BTW the data I published was before I fixed the oil tube connection.
So I had not driven the vehicle too much, since the rebuild. I decided on the weekend to give it a good run after I fixed the oil tube connection. I put a good 150+ miles on it. When sitting after the drive, hooked up the ODB tool and there were a few pending CELs but no stored (I had cleared memory before the drive). I got the following:
301
1128
1130
1117
The 1117 ( engine temp disconnection) is a first time occurrence and was interesting as it could relate to both banks and cause the DME to keep raising the mixture???
So the instances of the CELs have changed since my last reply. After the oil tube repair and the past couple days of driving, I still get 1 or 2 CELs, but it’s not as repetitive. Since my temporary tags expire today, I actually needed to take the vehicle in for it smog test. It did pass the smog test and the CEL never came on (whew). It has come on since the smog test with the above codes. So, I spent some time seeing how the vehicle did just idling. Letting it sit on idle, and after getting it to 190, it quit ramping to +25% on the STFT and the STFT stays near 0 (both banks). And I never got a 301 after that STFT was stable and not ramping 25 % meaning if the fuel trim stayed stable and within range, the misfire never occurred..
When looking for my air leaks, I have also noted that there is significant oil in the tube from the AOS to the air manifold. I did do the disconnect test and block the openings, but did not see a huge difference and I still encountered a 301. I also have seen a couple mornings where I get a bunch of blue smoke on start up …not ever morning??? I am considering replacing the AOS.
I will consider doing the compression and leak down, but I feel the computer data was telling me different and that the vehicle runs so sweet after getting beyond 1-2 miles and over 190F, that I’m struggling with doing the tests since the data is only good if the engine is at temperature which to do these test at temperature are difficult.
Oh …. I replaced the flywheel during the rebuild with new. I was careful on the install of the flywheel (not as careful as I was on the simple oil tube connection). Could the wheel sensor be acting up?
I’m still need to find root cause. Now that it passed the smog test and I can get real plates, the panic is not as bad; however I want to resolve the issue. I do not want to do permanent damage to the vehicle .So any feed back is appreciated.
Thanks
Paul
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