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SN-95 and New Edge Mustangs
Suddenly, Rough Idle And A Bunch Of Codes /Shrug
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<blockquote data-quote="SeikenFreak" data-source="post: 15574148" data-attributes="member: 122263"><p>First: Yes I do have long tubes <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> And I'm pretty sure the upstream O2 sensors were replaced because they look clean and new.. so probably when I got the car years ago and headers were installed. I can't remember.</p><p></p><p>Second: In terms of the oil leaks, I installed a remote oil filter and oil cooler setup. I was just getting some seepage from the lines on the new AN fittings etc. Nothing big and the only connector that got wet was the factory oil sensor there.</p><p></p><p>I was able to look at Alldata at work today and study various diagrams and connector pictures etc. The conclusion that I came to is that the Passenger Side (Bank 1) upstream connector is actually on the engine harness itself? And then the Driver's Side (Bank 2) upstream is on the trans harness (green connector).</p><p></p><p>If you use this image as a reference:</p><p><img src="http://www.terminator-cobra.com/images/2R3Z-15525-DA.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>You can see three O2 sensor connections. Green, blue, and purple. Blue and purple are at the end of the harness, so obviously are the downstream sensors. The grey connector to the right is where it plugs into the main harness up above the bellhousing. That thick stupid plug is stuck up behind the engine and there isn't enough space to move it because it's wedged between the firewall and my cooling head mod crossover hose. I could probably unplug the harness but it just seems like it would suck to get it plugged back in with no space back there.</p><p></p><p>Anyway, the point of the picture is to show that the green connector is the one that is way up at the top of the bellhousing. Since I have the extension plugged into that Green plug now, I don't think I need to adjust the harness itself as I can get either plug to either side.</p><p></p><p>I'm not sure why/how the other O2 sensor connector (pretty sure it was black for me) looked as if it was on the trans harness, because it was right there and I plugged it directly into the driver's side sensor. I need to examine it again now that it won't be cold, raining and I have a better understanding. Fuel pressure tester arrived so I'll be check that tomorrow as well. (Note: I replaced the fuel pump/sending unit/filter a couple years ago/5-10k miles)</p><p></p><p>For an update on the behavior itself: On cold start it seems to have a rough/high idle for like 30 seconds and then clears itself up. Sounds like a bad misfire or something and can feel the car running rough and then it smoothes out. I took the car to work again. Worked perfectly in the morning. Then, when I took it to lunch and when I went home, both times it ran a little rough on startup and then cleared out after siting for some time or driving away. Car has power and was reving it out to 4-5k RPMs with half throttle no problem.</p></blockquote><p></p>
[QUOTE="SeikenFreak, post: 15574148, member: 122263"] First: Yes I do have long tubes :) And I'm pretty sure the upstream O2 sensors were replaced because they look clean and new.. so probably when I got the car years ago and headers were installed. I can't remember. Second: In terms of the oil leaks, I installed a remote oil filter and oil cooler setup. I was just getting some seepage from the lines on the new AN fittings etc. Nothing big and the only connector that got wet was the factory oil sensor there. I was able to look at Alldata at work today and study various diagrams and connector pictures etc. The conclusion that I came to is that the Passenger Side (Bank 1) upstream connector is actually on the engine harness itself? And then the Driver's Side (Bank 2) upstream is on the trans harness (green connector). If you use this image as a reference: [IMG]http://www.terminator-cobra.com/images/2R3Z-15525-DA.jpg[/IMG] You can see three O2 sensor connections. Green, blue, and purple. Blue and purple are at the end of the harness, so obviously are the downstream sensors. The grey connector to the right is where it plugs into the main harness up above the bellhousing. That thick stupid plug is stuck up behind the engine and there isn't enough space to move it because it's wedged between the firewall and my cooling head mod crossover hose. I could probably unplug the harness but it just seems like it would suck to get it plugged back in with no space back there. Anyway, the point of the picture is to show that the green connector is the one that is way up at the top of the bellhousing. Since I have the extension plugged into that Green plug now, I don't think I need to adjust the harness itself as I can get either plug to either side. I'm not sure why/how the other O2 sensor connector (pretty sure it was black for me) looked as if it was on the trans harness, because it was right there and I plugged it directly into the driver's side sensor. I need to examine it again now that it won't be cold, raining and I have a better understanding. Fuel pressure tester arrived so I'll be check that tomorrow as well. (Note: I replaced the fuel pump/sending unit/filter a couple years ago/5-10k miles) For an update on the behavior itself: On cold start it seems to have a rough/high idle for like 30 seconds and then clears itself up. Sounds like a bad misfire or something and can feel the car running rough and then it smoothes out. I took the car to work again. Worked perfectly in the morning. Then, when I took it to lunch and when I went home, both times it ran a little rough on startup and then cleared out after siting for some time or driving away. Car has power and was reving it out to 4-5k RPMs with half throttle no problem. [/QUOTE]
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Suddenly, Rough Idle And A Bunch Of Codes /Shrug
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