A/F Ratio and CEL Code HELP needed

[Talonman86096]

Ok so I thought I had my problem solved but I guess not. I threw a P0300 code the other week and long story short I got link working and was able to clear the code and set the DTC's to not check for cylinder misfires as well as Invert the CAS. Car was running great the last two days. So today I am driving and the CEL comes on again and it starts the same symptoms. I limp home and plug in link and am getting the same code and the cylinder misfires is checked again and the invert CAS is back to being not inverted. I didnt disconect the battery or anthing like that so I dont know why it reset or didnt save from the other day? Any ideas??

Also I did a log with the key just on the on position car was not running. I dont now how to post a log on here...I am using Link 2.5. At the bottom of the screen it said the A/F ratio was 18:1 which is way to lean from everything I read. The timing was 5.2, front o2 sensor was .4v. Im still learing link and I dont know if I need to do a log with the engine running or if the key in the on postion will give any kind of insight. I have 550cc injectors with the dead time set at 180 and global at 19. I dont have a wide band yet because I am just a little tight on cash at the moment so I am trying to get it so I dont worry about running lean. So what do I need to do basically . I'm sorry for sounding like a complete newb here but I really am when it comes to tunning.

I am running a Big 16g. My boost gauge at wot will go to about 15psi, however the gauge sits a little more then one dash below zero when the car is off so I dont know how accurate the 15psi is.

 

[V12 Killa]

Ok so I thought I had my problem solved but I guess not. I threw a P0300 code the other week and long story short I got link working and was able to clear the code and set the DTC's to not check for cylinder misfires as well as Invert the CAS. Car was running great the last two days. So today I am driving and the CEL comes on again and it starts the same symptoms. I limp home and plug in link and am getting the same code and the cylinder misfires is checked again and the invert CAS is back to being not inverted. I didnt disconect the battery or anthing like that so I dont know why it reset or didnt save from the other day? Any ideas??

Maybe you forgot to hit save to ecu Loose battery cables? Double check you battery connections??

But as for the p300 code, misfires are usually caused by plugs/wires or injectors. So I would pull out the plugs and check them out first.

Also I did a log with the key just on the on position car wasnot running. I dont now how to post a log on here...I am using Link 2.5. At the bottom of the screen it said the A/F ratio was 18:1 which is way to lean from everything I read. The timing was 5.2, front o2 sensor was .4v. Im still learing link and I dont know if I need to do a log with the engine running or if the key in the on postion will give any kind of insight. I have 550cc injectors with the dead time set at 180 and global at 19. I dont have a wide band yet because I am just a little tight on cash at the moment so I am trying to get it so I dont worry about running lean. So what do I need to do basically . I'm sorry for sounding like a complete newb here but I really am when it comes to tunning.

I am running a Big 16g. My boost gauge at wot will go to about 15psi, however the gauge sits a little more then one dash below zero when the car is off so I dont know how accurate the 15psi is.

Make a log with the car running. Is global + or - 19??

To post a log, just click on Upload/edit photos (find&click on your saved log and upload it) under Additional options.

Dash boost gauge is worthless for reading boost, use it to display knock instead (Under the Dash tab on Link)

 

[Talonman86096]

I have an aftermarket boost gauge. I will double check the battery connections and make sure they are good. I checked the plugs the other day when I did a compression test and they all looked good, however it seemed like there were two different types of NGK's in it. Two had the dual electrode and two did not, but all were NGK. I just replaced the wires before this problem started. But I was told that it was most likely because I did not have it set to ignore cylinder misfires because it is 6 bolt swap with a 1g CAS. Under the DTC's where I unchecked the cylinder misfire there was nothing that said "save to ecu" just an "ok" button which is what I clicked, same as the invert CAS under Misc. Is there something I was missing?

The global I believe is set to -19 but I will double check that again as well as do a log with the car running. Just will be a little while till I get the chance to do it today. There is only about 26000 on the rebuild and I really don't want to damage anything because of running lean so I'm trying to be extra cautious ha

 

[V12 Killa]

I would replace your plugs with some some Ngk BPR6ES.

Check out this link about the CAS & wiring firing order.
swapplugwires [ECMTuning - wiki]

My mistake, it reads Copy all to ECU or Copy to ECU

 

[Talonman86096]

My link does not look like that screen. Its just a black screen.

 

[clipto]

Your running v2 right? Best just study up on ecmlink website if your ganna tune yourself. Or save up get a tuner tune it good and call it a day.

 

[V12 Killa]

My link does not look like that screen. Its just a black screen.

You can download the v3 software to your laptop and use it with the v2 software on your ECU. I'm still on v2 but have v3 software on my Macbook.

Link to download:
ECMTuning, Inc.

 

[Talonman86096]

Ok I downloaded version 3 and did a log which I will upload with this post. My deadtime is set at 180 and the global is -18.8 just to clearafy that. This was a log with the car running and just about completely warm. The cylinder misfire is unchecked and Use non 95/96 CAS options is active. I cleared the CEL for the random misfires.

 

[V12 Killa]

Anymore misfires? Hopefully none, but buy a wideband to help you tune when money becomes "loose"

& mess with your tune to richen your idle; you're running a bit lean (16ish). Even though Link provides an estimated a/f ratio (better than nothing) try and aim for 14.5ish. GL

 

[Talonman86096]

Ok so I drove the car today to work and back (about 20 minutes each way) and then ran a few more errands and did not have any more issue with misfires and no more CEL. The car ran great and felt very responsive. I was thinking about it and remember that before I had the CEL re-appear and have the misfires come back that I had pulled a couple fuses to check them (half of my speedometer does not light up as bright as the rest of the gauge cluster and my radio stopped working for some reason.) But anyway the only thing I can think is that somehow reset the computer, even though I didnt lose the adjustments that were on it for the injectors.

So now on to the next which is trying to educate myself on getting the idle a bit more rich. I know I need a wideband and would love for my money to become more "loose" hopefully soon. I've just been trying to read up on it as much as I can, because frankly I am paranoid about running lean and potentially popping my motor ha. So any advice is always welcomed. Is this basically a good guide...

http://www.dsmtuners.com/forums/articles-tuning-ecu/262460-basic-dsmlink-tuning-guide.html