TranzerZ Posted August 16, 2023 Report Share Posted August 16, 2023 Hi Everyone, I had an electric exhaust cutout installed last week on my boosted 2004 G35, thinking that it will open up my exhaust flow and increase my performance, but all it does is make my car loud lol. I'm guessing maybe I need to re-tune the car with the cutout valve open, so I've been just driving it around since with it shut closed. But since yesterday, my car started to have an exhaust chugging/sputtering. It does not happen when I first start up the car. Only when I start driving for awhile. Doesn't seem to be affecting my performance when driving either. When I let me car idle at the end of a trip, it will continue to chug/sputter for awhile but will eventually stop. I was wondering if it has something to do with the exhaust flowing into the short pipe where the closed cutout valve is, creating a weird turbulence. Can someone check my logs to see if there is anything unusual, and hoping it has nothing to do with my fuel/ignition, or worse, my engine. https://drive.google.com/file/d/1XZVRwBCwKlPLaT5sCIqyBzY6IE5JZyP7/view?usp=drive_link https://drive.google.com/file/d/1pYUQbc5rK-il-Ni5U2xWl5Fan-EwCliY/view?usp=drive_link https://drive.google.com/file/d/1EtnBfnPfcQopVnZrVWWtaBawoyOj2hn_/view?usp=drive_link Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 18, 2023 Author Report Share Posted August 18, 2023 So the issue seems to be getting worse. My car was jerking in the lower RPMs, in any gears, and still chugging. Can anyone check my log to see what may be wrong? Adam? Please? https://drive.google.com/file/d/1LRBOHNYJeDJupppIwCiCDmQsdCYPNfAL/view?usp=drive_link Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 18, 2023 Report Share Posted August 18, 2023 None of your files are accessible. You need to go into the sharing settings and set it to "anyone with link". Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 19, 2023 Author Report Share Posted August 19, 2023 Sorry about that. The shared settings were changed. You can try any of the links now. This one below is from today. The problem is getting worse. Now it sputters every time I accelerate. https://drive.google.com/file/d/1ywZJqUQHBa4H9MOD8nBOaeObx7SnQGci/view?usp=drive_link Quote Link to comment Share on other sites More sharing options...
DerekAE86 Posted August 19, 2023 Report Share Posted August 19, 2023 Upload a copy of your tune file too. It's hard to get a full picture without it. But you've got a serious amount of ignition timing going on. It just instantly maxes out at 40deg. Is this how it was tuned? Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 19, 2023 Author Report Share Posted August 19, 2023 I had it tuned about 4 months ago and it's been driving great ever since. The issue started just last week and the 2 things I did differently before that was installing an exhaust cutout (which I'm going to have it removed very soon) and adding Lucas Ethanol Conditioner for the first time. The tuner told me he created several tables to adjust to ethanol content/level and for pump gas. Not sure if adding the Conditioner created the problem. How do I get the tune file? Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 19, 2023 Author Report Share Posted August 19, 2023 I think I got the tune file. I did another short run. I may go change out the spark plugs for now and see if that's the problem. https://drive.google.com/file/d/1PwbzBZKHW85blJHMIG6LpalYVPl3ceKH/view?usp=drive_link https://drive.google.com/file/d/1Teowo96BToUxr9SAf6GOzK1J_cCgYZui/view?usp=drive_link Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 19, 2023 Author Report Share Posted August 19, 2023 Or maybe it's this... https://drive.google.com/file/d/19hf38z2H1mbL0VCGKfN5b4wFiS-exQfE/view?usp=drive_link Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 19, 2023 Author Report Share Posted August 19, 2023 So I spotted something unusual on my last log starting at about 1:51. My Lambda 2 has an error "Nernst Cell resistance too low." Then it changes to "40 IPE or APE Error." https://drive.google.com/file/d/1Teowo96BToUxr9SAf6GOzK1J_cCgYZui/view?usp=drive_link Quote Link to comment Share on other sites More sharing options...
DerekAE86 Posted August 19, 2023 Report Share Posted August 19, 2023 Those two errors indicate your sensor is failing/failed. Looking at that log there is a huge spike and then dip in reported Lambda2 Temp Maybe that sensor is now misreporting the Lambda reading causing the fueling to poorly adjust? Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 19, 2023 Author Report Share Posted August 19, 2023 Temperature seems very high right? My mechanic screwed the 2 CAN Lambda units onto the firewall right behind the engine. Is that a bad spot for it? Is this something I have to replace now? Quote Link to comment Share on other sites More sharing options...
DerekAE86 Posted August 19, 2023 Report Share Posted August 19, 2023 Yeah typically the Lambda temps are pretty stable at 780deg like the Lambda1 is reading at. Being in the engine bay / on the firewall isn't really an issue in itself - but I wouldn't put the CAN Lambda units in an excessively hot area of the engine bay. Quote Link to comment Share on other sites More sharing options...
Vaughan Posted August 20, 2023 Report Share Posted August 20, 2023 Note that Lambda Temperature is of the sensor itself not the CAN Lambda box, the Link CAN Lambda controls the temperature of the Lambda sensor using the heater to maintain it's temperature at 780deg that the sensor is designed to work at. Quote Link to comment Share on other sites More sharing options...
TranzerZ Posted August 22, 2023 Author Report Share Posted August 22, 2023 Ok, so I finally figured it out. It was a bad spark plug coil. Thank goodness it was something minor but I'm still concerned about the CAN Lambda. Thanks to all for helping me resolve this. I do have another question though. I'm trying to calibrate my temp sensor but on Cal Table it doesn't have "Output Table Start" or "Output Table Increments" and the table itself only has 1 column. How do I expand this? Quote Link to comment Share on other sites More sharing options...
DerekAE86 Posted August 22, 2023 Report Share Posted August 22, 2023 2 hours ago, TranzerZ said: How do I expand this? Right click the table -> Axis Setup Quote Link to comment Share on other sites More sharing options...
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