Working on my 2013 ILX and I've finally been defeated and have to throw in the towel and see what you guys think.

The car sat for almost a year with a failing clutch. Last week I jumped it and took it on one last drive before replacing the clutch to see if anything else was bad. Noticed horrible brake noise from rusty rotors but that was about it. Except for not having a working clutch it drove pretty good.

I get back to the shop, replace the clutch/flywheel/pressure plate and throw everything back together and start it up. Everything works fine so I take the car for a test drive and after about 2 minutes the car bogged hard on acceleration. It felt like losing a boost clamp on a turbo car. Horrible misfire and had ot limp it back partial throttle to prevent it from misfiring more.

I get back to the shop and start doing my normal tests. I now had multiple codes, none of which I had before then. The typical P0300 and p0301-p0304 for all cylinders misfiring. I immediately assumed fuel or spark. Tested all the coils and injectors and signals were good on all of them. Decided to replace the plugs but they honestly looked fine. Checked fuel pressure and it looked fine as well. Ended up pulling the fuel pump and throwing in another fuel pump to see if anything changed and nothing did.

How it sits right now I turn the car on and it runs like a champ, no issues for about 2 minutes. Then after those two minutes or so when I give it any gas over 5-8% throttle is starts randomly misfiring in all 4 cylinders. I've scoped all signal wires and crank/cam sensor and found no issues.

The car idles like a champ and has no issues at all until I press the gas. After letting it run for quite some time I was also getting a couple more codes. An pcm/abs code 83-11 and 85-01.

If you have any ideas please lmk because at this point I've run out of good ideas.

 

The one thing I can think of is the flywheel might be causing all of my problems. I went from the factory flywheel to a light weight flywheel and I'm wondering if it being so light might be causing some issues with the crank sensor. I've seen that on other cars in the past but I haven't seen that for a while. If that were the case I could just tune the car and delete it out. If it's not that I have no clue.

 

The SI of this generation will generate misfire codes with a light flywheel.

 

I've been seeing a lot of that online and it makes sense. I'll wait to see if anyone else comes up with anything but for now I'll start looking for a flashpro.

Thanks.