JONBLARC7

I happens but along as it didn't mess anything else up. It's a pretty easy fix. Still sucks I have a love hate relationship with my truck. Mine broke a valve spring at 105K miles and it was cheap and easy fix. Then at 125K miles it stuck a lifter. So I pulled it apart and put a TSP 218/226 in it. Now I enjoy messing with SS camaro's and mustangs

Pull the valve covers on that side and see if it's a broken valve spring. Mine broke on number 5 at 105K miles. It didn't drop or bend the valve. So it was a quick and easy fix. It's pretty common with 6.2's. They have since updated the design of the valve springs.

Was the tune adjusted for the meth???

Enough to make a small cloud LOL. Hard to explain and I should have made a video before I fixed it with the SOI table. It's not a just a puff. If I hit it hard at a stop light, it was enough to make to see two lanes coming through the cloud. It was black smoke but not as thick as a desiel. I mine would clean up above 4,000 rpms. But thats also when my SOI would drop back down to 320 to 330.

aem 30-0300, But in futher reading, other people with camaro's and vette that where blowing black smoke didn't show up on the wideband as being super rich.

In my situation your right and wrong. LOL Your wrong because I leaned mine out to .87 to .88 lamaba and it still blew smoke on 93. Your right because even though the wideband was reading .88 the SOI was injecting to long and spiting raw ruel out of the exhaust valve and causing black smoke. But this wasn't effecting the wideband.

Remember just becasue you set it for 280 doesn't mean it spray's at 280. In my simple mind the 6.2 computer it set up to run the SOI at a certin point on 93. Then when you enable E85 the SOI mulitpliers for E85 advance it to far. And you get up into the upper 350's. If it was me I would just log your SOI pirmary and then you'll know how far it is advancing immediately. Also Higgs said to him 280 seem to land right in the middle of where it needs to be.

I wanted to come back to this thread with a definite answer for blowing black smoke on 93. Earlier in this thread I said I leaned it out and it did help some. But I mainly run only E85 which burns reall clean. So when I would go on a road trip I would load up with just 93. And the black smoke is still there. Not as bad as stock PE tables but still there. So Lucas287 I don't know if you saw the thread on HP forum about "How far do you let you EOI drop". Lots of good info on that thread. I can post it if you like. Anyway I started logging my SOI. Which is Start Of Injection for those who don't know. Well on these DI motor the sweet spot NA is a SOI of 330. I noticed on my wide open run it would jump up to high 350's then drop back down to 330 which is where it cleaned up durning the pull. At high 350 it must still be injecting while the exhauust valve is starting to open causing the smoke. So Higgs Boson (which is a very respect member on that forum) gave the advice to make the whole SOI table 280 and let all the back ground multipliers do there job to raise and calculate the the SOI on it own. And Bam no more Black smoke and holding steady at .87 to .88 on the wide band on 93. With the whole SOI table set at 280. It will jump up to 320 or so now during a pull. But like Higgs Boson said, the whole truck just runs smoother now.

I'll up load another video to YouTube tonight of it after I have played with the overunder speed in the tune to get more chop. The TSP 218/226 is a great cam for the L86. But with a quiet exhaust is barely noticable at idle. I have ran the 12909 on two 6.2's my 2008 denali full headers and catless and the L86 headers and catless. And like it on both, the only reason I'm changing it now it to hear my cam better. If i didnt have a cam I wouldn't change a thing.

I have the 12909 with headers and catless y pipe. It will tame it down. BUT with my cam I've been wanting more to hear the cam better at idle, So I've had a XR1 sitting in my closet since Christmas. I just haven't had time to get it put on. The 12909 is a good muffler and pretty loud at WOT. But if you heard you truck with stock manifolds and muffler then just switched out the muffler to a 12909. It's no louder than the stock muffler, just deeper. It wasn't until I put the headers on my truck that it came alive. In fact my wife even said you spent money on that muffler because she couldn't hear it crank from inside our house. But I knew I was putting headers on it soon. Since I already had a cam and I didn't want to rattle the neighbor's window. I'm ready to rattle windows now. Lucas287 is right about the tune. I thought it was call split timing or something. But I could be completely wrong. I read about it on the HP forum. And paln to do that to my tune once I get the XR1 installed

And I have my Flex Fuel Spark Mult just like Lucas287.

I wanted to add to this. When I first started running E85 after adding my headers. There was a flat spot in the crusing area when running E85. The truck would down shift on hills that with 93 it would just hold that gear up the hill. How I fixed it was to add 1 to 1.5 degrees of spark to those area's in the main spark table. Then E85 table will add or subtrack from that number as they need to. This little adjustment didn't give me any Knock on 93 but made the dead spot completely go away. I think dailing in the rest of my tune really helped too, like lucas287 said!!!

Time for hearders and no cats. That will really wake it up. My Magnaflow 12909 was no louder than the stock muffler. Maybe alittle deeper. Now with headers and no cats it's much louder. But I'm still going to switch that muffler out for the Borla XR1 I have sitting in my closet to here the cam better at idle.

10-4 that was going to be my next question. When I was porting mine I had to get rid of the stock O-ring. I'm just going to silicone to ICT adapter to the snout of the intake.

What throttle body are you running?

Mine did not

Very nice what are your thoughts? I got one on the work bench at home that I ported the snout myself to work with a Zl1 throttle. I just haven't had time to install it yet.

Sounds the same. "Maybe a tad louder" "Maybe"

I would think I would have more of a blue haze even if it was oil being built up. I've seen a vette with basiclly the same mods as me, with the LT1 do the same thing too.

Is that back to back runs or run it hard then later that day run it hard again? Mine did the same thing until I tuned it leaner. Another guy on performancetrucks had the same tuner that did the original tune before I did all the work on it an learned to tune. He had a L86 and told me he was getting black smoke out of the tail pipe at WOT.

Yes I lean it out. Now it runs .87 to .88 on 93 octane and .88 to .89 on E85. On 93 there is still some smoke but nothing like it was where it looked like a desiel on the hit. On E85 it is pretty clean but E85 also burns much cleaner. I didn't mention the rich thing because I know the Truckguy82 doesn't want to retune his truck. But they are pig rich from the factory for a DI engine. And without a wideband I put money on BB left the PE stock.

Thats about how much my cammed L86 drinks in the summer. I did the same thing before I had the cam too.

Some 5.3's come with the sensor already installed 6.2 do not. I have the sensor install on my 6.2 There is a good thread on here about how to install it by using an exsisting fuel line and heating it up and bending it. Then buying a sensor and just extending the harness. That's what I did. But I say all that to say your probable maxed out on the stock system with just 93. you'll need and cam with a 32% over fuel lobe, LT4 injectors and some low side support.

Will they fix this if your way out of warranty. My 2014 is doing this for sure. I was just going to do it my self, but if they'll do it for free they can have it. LOL

It shouldn't lose any unless it's dripping. But did you check the fluid?