15 SI looking for help on a tune

[15FB6Si]

Here's the next one!

[15FB6Si]

I can run more tomorrow. got work in the morning and cars a Lil loud to keep pulling in and out this late especially because I live behind the police station lol. i appreciate it a lot man it is running a lot better already.

[EFICU]

Okay sounds good. Yeah you really don't want to piss off your neighbors. Haha. It looks good, but there is definitely something going on at idle. It seems like a vacuum leak, or something on the intake side. Has the intake manifold every been off the car for any reason? Either way, you might double check the intake manifold bolts to make sure they're tight and the gasket isn't damaged. Based on the idle and part throttle fuel trims, it seems as though unmetered air is sneaking in somewhere. The WOT fuel is dead on though, so it's a bit strange. Either way, take this next one for a spin when you can. I made some more changes to remove the knock.

15FB6SI.SD.Rev03 (Blended)(Vtec4500).fpcal

[15FB6Si]

No on the intake mani and I will load the tune up now and take a log when I get off work

[15FB6Si]

Just from the drive to work Everything felt good except for the idle still but I did get a check engine light at the end of the drive. Didn’t log this drive

[EFICU]

Being that the issue was on your old calibration and on mine, there is something mechanically going on. Generally if you have an idle problem on the MAF tune, then switch to a speed density tune and the idle is still an issue, it's something mechanically. You might research the idle relearn procedure and try that. I'll look in the next datalog, but it's odd how the fuel trims weren't kicking in at idle causing for a lean idle condition. Not lean to worry about, just a couple points off target, and only at idle.

[15FB6Si]

just logged this on the way home from work. i noticed idle changed if I turn my heat on. it seems like it wants to even itself out. but here's the next log. and I'm not sure if you can but I would like it to burble. nothing aggressive just like a pop at higher shift points or a few small ones of decel

[EFICU]

Yeah overall it looks great. All the fuel stuff looks right on, I made some ignition changes in one spot for the knock. Other than the idle we're getting there. You could also try disconnecting the battery for 10-15 minutes and letting it all reset too. Not sure that helps the idle, but it would rest everything.

With the stock cat in there we can't do anything for burbles and all that. It's not good on the engine or the cat to do that. With a ... DP you can make it burble some, but it's still not recommended.

Here is the next one. We'll see how it goes.

15FB6SI.SD.Rev04 (Blended)(Vtec4500).fpcal

[15FB6Si]

alright man ill take your advise on that it makes small ones naturally randomly with your tune and sounds good. ill let the car reset, load up the next one and get a log for ya

[EFICU]

Yeah the ones you hear are just the injectors shutting off for the most part. A ... DP would make those more noticeable.

Let me know how it goes with the idle.

[15FB6Si]

Idle still weird but I've heared it takes 5-6 cold starts on 1 config for the car to learn the idle and I've had that happen before so maybe that's it because I haven't gotten another code. could also be plugs or o2 sensors. other than that no knock, felt great

[EFICU]

Yeah it looks great. Go ahead and drive that calibration for a few days and see how the idle goes. Then we can look into a new o2 sensor or other options. But it's plenty good to run for a few days, get some cold starts done, and see how the idle goes.

[15FB6Si]

My dad has a smoke kit at his shop. I’m gonna check for a vacuum leak tomorrow. And if still having problems then I’ll look into plugs and sensors sooner

[EFICU]

Sounds good. Let me know how the smoke test works. It wouldn't be the spark plugs, but I can't rule out the o2 sensor, though I don't think that's it either.

[15FB6Si]

Just did a smoke test. No vacuum leak. I cleaned throttle body. And checked a few other things. Everything looks fine. But idle still doing it