Well looking over these logs I notice now the timing at idle is higher than I expected, I was expecting to see around 8* but instead I see 11-12, Looking at my tune I realize I inputted my stock lancer idle timing in the same rpm range but my car doesnt idle at the stock 750ish of the stock car, I have it at 1000 so I am going to make my timing map reflect that and see what happens.

Looking at Ryans timing map I expected to see even higher idle timing than my own but I have some logs of his idle I took when I had his car and low and behold the timing hangs out mainly around 7-8 and some 9's in there.

 

I do remember, I also remember that this most recent idle fix of yours I could tell right away the idle sounded better, no miss that I could hear at all. I want that dammit!!!!! so I interpolated some of your timing into my existing idle timing. Then I look out the window and realized the wife took my car to work so looks like I wont be flashing this for a while.

 

Ok so, flashing the new idle timing GREATLY enhanced the idle, I went from idling at 11-12* down to 6-7*, I believe the reason my past attempts at adjusting the idle timing to remedy this issue netted no change was because I kept adjusting it at the 750 rpm area. For some reason it never clicked that my car is not idling at 750 lol.

Ok but I am not out of the woods yet, I think 6-7 is a bit low I adjusted the map to hopefully bring the timing up to about 8*, I havent flashed this yet though. All day long yesterday the warm idle was sweet with maybe 3 or 4 dips happening over a collected 1/2 hour or more of idling, normally there would have been probably 100+ dips. When I got home from a clutch job last night it was about 1am and the dips were more pronouned again... not sure what is up with that, but I could still tell the idle had improved. Cold idle however sounds like I have a cam lol and instead of the car idling at like 1500-1600 whens its cold it idles at 1000 right off the bat and yeah it sound like a loping cam at idle and some times idle drops really low, not like the dips I have had but more like it just starts getting lower and lower fairly quick then recovers, AFR is off too its going lean alot.

I have also adjusted my target idle table a little so I am going to flash these settings and see how it goes but at this point I am thinking maybe my injectors are off? Any thoughts?

 

have you tried just adjusting the biss screw with evoscan?

 

yup, most recent being a couple days ago i waited for a break in the dips then adjusted it lol

 

So I noticed after my changes today the idle started getting worse and everytime I made a small adjustment to the timing it got a little worse and a little worse, so I flashed back to my initials settings that were working well yesterday with the only change being changing my idle to open loop. I the idle goes back and forth, one stoplight it will be dipping, then the next light it will be smooth as butter. I think the timing is good now though, and need to concentrate on fuel. My A/C on and a/c off are still incredibly smooth now compared to before.

Now in open loop my idle afr will settle on around 11.3ish so its definitely rich. My question is whould I adjust the latency or maf scaling?, I tried latency with the other timing but even though the logs showed I was gettting closer in my trims it seemed the idle was getting rougher. So I am leaning towards lowering the values in the maf scaling 25-50 hz range. I also noticed with the new timing my car idles at 31hz now instead of 25hz despite same rpms, I still dont think the low trim is updating like it should though.

 

Alright so I didn't want to say anything until I was pretty confident, but it seems I have finally resolved my idle issues. *knocks on wood* The actual timing at idle was probably 90% of my issues with the other 10% being various fuel settings.

I believe my maf scaling table has much to be desired still so I think I will be revising that before I tackle the fuel map revision as now it is way out of whack. My latencies are slightly different and my injector scaling is up to 370 from 361 and my maf scaling in the idle hz range is quite a bit lower than before. I still have some work to do but my injectors are looking pretty good. LTFT low is sitting at -3 and my LFTF mid is sitting at +1.75, I could probably get them close but meh I have been getting a couple error codes lately while trying to flash that is making me nervous and wanting to limit the number of flashes.

 

Sounds good man. At least its progress. The fuel trims are pretty good tho

 

Yeah plenty good enough for me. Really hoping to get everything wrapped up good this week as next week I start school again.

 

So this may be a dumb question but isn't there a table in ecuflash that you can use to modify when the car switches to closed loop during initial cold startup? I swear there is and I can't seem to find it anywhere.

 

Yep should be a "minimum temp" for closed loop table but i recall its like really low like 10c or something.

 

Yeah I was able to find it in my stock base lancer rom, its set at 7C, either way yeah I don't think this table will help. My idle is awesome now just tidying up a minor thing. I slightly lowered my timing during cold idle which helped a lot with the wicked cam sound. However while its warming up it the afr will hang out around 17 until the coolant hits around 150F or so then it starts to drop down to stioch and after that its good. The idle stays consistent but I can tell it struggles a little with the lean fuel. I tried adjusting maf comp vs coolant but no luck there. I am extremely happy with the idle now but I might as well get this little issue resolved.

 

So I decided to log idle from cold to warm to get more precise information after I adjusted all 4 of my post primer enrich tables way up in the problem area. That didnt help so after thed log I flashed those back to stock. I did find something interesting though, low and behold the exact moment the afr began to drop down to normal (which took 9 seconds to go from 17.7 down to approx 15) was also the exact moment the 02 feedback started registering leading me to believe that is when it kicked into closed loop. However it was 159F, 4 minutes into idle when it made the switch so now I guess I need to find that table to drop that lower.

This does not make sense to me though. If I put it into forced open loop at idle it will idle at like 12. Yet without forced open loop at idle it will idle at 17+ during its open loop warmup until it goes into closed loop, did I miss something here?

I still cannot find that table in my rom anywhere can someone point me in the right direction to get the code to add it to my XML?

 

Sooo I am pretty sure I know what is going on. I dont think my LTFT low is accurate. I still cant get it to update unless I hold the throttle just barely to bring the airflow hz up. I believe since I lowered my maf scaling down so much is what is causing the issue. I dropped my fuel map down 11.7 and my cold idle is now at 15.0 instead of 17.5+ so I am going to change that back and bring my lower maf scaling back up.

 

Ok just thought I would update. I brought my maf scaling way up as I had previously dropped down alot trying to get my fuel trims in check. That along with raising my maf compensation I was able to get my open loop cold idle to a healthy 14.7-14.8. I still seem to have some erratic cold idle issues and seems the colder the ambient temp outside the more the idle trys to dip on me whether its cold idle or warm idle, although the idle is still eons better than it was before the timing change. Figured I might as well do some more fine tuning on the timing as well so I have been playing around with that alot lately, little improvements here and there. 3 steps forward 2 steps back seems to be a good description for tuning lol.