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SVTPerformance's Chain of Restaurants
The Distillery
Anyone seen black "goo" build up on their injectors from E85?
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<blockquote data-quote="MalcolmV8" data-source="post: 15205898" data-attributes="member: 8854"><p>I have physically looked at the TPS sensor as well as data logged it and all looks fine.</p><p></p><p></p><p></p><p>You know I don't recall exactly. I could go back and look at the pics because I did take quite a few. I don't think I pulled your injectors or rails, there was no need I don't believe. Yes you could have yours out in minutes, my passenger's side took me over an hour and half to get back in and that was with a friend helping half way through because I was just fighting a loosing battle trying to lift the blower and get injectors in etc. on my own. I can't even tell you how much I've come to hate this crusher inlet!! I'm so dang ready to just cut it in half and make it removable. If spring wasn't just weeks away I'd be cutting that in half as we speak <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> lol</p><p></p><p></p><p></p><p></p><p>Don't even have to get close to WOT, just enough throttle to load up the engine, like going up a hill and want to slightly accelerate and maybe pass a car and boom lean. Really lean like bucking and missing and hardly running lean. The crazy part is data logs look great.</p><p></p><p>You can see on a data log the TPS shows exactly where I increase throttle, you can see MAF counts go up as expected, you'll see the pressure drop across fuel injectors stays right in the 39.xx range as my fuel pressure goes up to compensate the diminishing vacuum (car gets into maybe 1 or 2 lbs of boost at most), you can see injector duty cycle increase for extra fuel, short term trims show it's commanding .98 or so (open loop very light throttle as mentioned) yet you'll see wideband peg 1.20 lean and car misses and bucks.</p><p></p><p>I was initially convinced it wasn't getting spark. I pulled all the plugs (cursed my crusher inlet some more) and put all new ones in gapped at .028 which is what I've been running. No change. Then I was convinced it wasn't getting fuel so I pulled the injectors, saw the black goo and figured oh that must be it. Cleaned them and while I can tell it improved their spray at idle etc. the issue still exists.</p><p></p><p>I've been trying to think back to recent changes. So I've had the J&S Vampire unplugged since the new build since it's 100% E85. Maybe the harness as vibrated and worked its way back the box under the seat and is partially contacting and causing ignition coils to do weird stuff. It's a stretch but I'm lost, going to check tonight.</p><p></p><p>The other change is that I cut the EGR sensor input wire to my ECU. I think it was pin 65 from memory, will have to look it up again and connected my wideband output there. The reason is I've been playing with a Quarter Horse recently (it's not in there now) but when you do the Quarter Horse can use the EGR 0-5 volt input to read your wideband. Kind of slick. Maybe that's somehow causing me issues so I'm going to undo that tonight too.</p><p></p><p>Short of that I'm lost, compression test is a good 110 which sounds low but it's because of my cams and a late closing intake valve and valve overlap from what I've read. So normal for my motor.</p><p></p><p>I also noticed when just cruising a long distance on the interstate at 70 mph holding a very steady speed at random the car would start to pulsate a little. I could see the wideband gauge swinging from 13 ish to 16 ish or so and also my vacuum gauge was pulsing between 8 and 10 inches give or take. It happened a few times and we grabbed the laptop from the back seat and hooked it up and of course the car wouldn't ever do it again so I've not gotten a data log of that.</p><p>I do think it solidifies something is definitely not right.... just what is it? Appeared out of no where one day suddenly it seems.</p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 15205898, member: 8854"] I have physically looked at the TPS sensor as well as data logged it and all looks fine. You know I don't recall exactly. I could go back and look at the pics because I did take quite a few. I don't think I pulled your injectors or rails, there was no need I don't believe. Yes you could have yours out in minutes, my passenger's side took me over an hour and half to get back in and that was with a friend helping half way through because I was just fighting a loosing battle trying to lift the blower and get injectors in etc. on my own. I can't even tell you how much I've come to hate this crusher inlet!! I'm so dang ready to just cut it in half and make it removable. If spring wasn't just weeks away I'd be cutting that in half as we speak :) lol Don't even have to get close to WOT, just enough throttle to load up the engine, like going up a hill and want to slightly accelerate and maybe pass a car and boom lean. Really lean like bucking and missing and hardly running lean. The crazy part is data logs look great. You can see on a data log the TPS shows exactly where I increase throttle, you can see MAF counts go up as expected, you'll see the pressure drop across fuel injectors stays right in the 39.xx range as my fuel pressure goes up to compensate the diminishing vacuum (car gets into maybe 1 or 2 lbs of boost at most), you can see injector duty cycle increase for extra fuel, short term trims show it's commanding .98 or so (open loop very light throttle as mentioned) yet you'll see wideband peg 1.20 lean and car misses and bucks. I was initially convinced it wasn't getting spark. I pulled all the plugs (cursed my crusher inlet some more) and put all new ones in gapped at .028 which is what I've been running. No change. Then I was convinced it wasn't getting fuel so I pulled the injectors, saw the black goo and figured oh that must be it. Cleaned them and while I can tell it improved their spray at idle etc. the issue still exists. I've been trying to think back to recent changes. So I've had the J&S Vampire unplugged since the new build since it's 100% E85. Maybe the harness as vibrated and worked its way back the box under the seat and is partially contacting and causing ignition coils to do weird stuff. It's a stretch but I'm lost, going to check tonight. The other change is that I cut the EGR sensor input wire to my ECU. I think it was pin 65 from memory, will have to look it up again and connected my wideband output there. The reason is I've been playing with a Quarter Horse recently (it's not in there now) but when you do the Quarter Horse can use the EGR 0-5 volt input to read your wideband. Kind of slick. Maybe that's somehow causing me issues so I'm going to undo that tonight too. Short of that I'm lost, compression test is a good 110 which sounds low but it's because of my cams and a late closing intake valve and valve overlap from what I've read. So normal for my motor. I also noticed when just cruising a long distance on the interstate at 70 mph holding a very steady speed at random the car would start to pulsate a little. I could see the wideband gauge swinging from 13 ish to 16 ish or so and also my vacuum gauge was pulsing between 8 and 10 inches give or take. It happened a few times and we grabbed the laptop from the back seat and hooked it up and of course the car wouldn't ever do it again so I've not gotten a data log of that. I do think it solidifies something is definitely not right.... just what is it? Appeared out of no where one day suddenly it seems. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
Anyone seen black "goo" build up on their injectors from E85?
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