[JLL]

Reserved for me.

 

[JLL]

Got an updated tune in and this thing rips! It’s never held this much boost and has tons of get up and go now.

Good deal

How long did the tuning take?

 

[JLL]

Well this tune revision was a beta tune from the manufacturer. So it was sent within hours of me checking for an update. One of very few to have it. 🤓

The manufacturer of what?

 

[JLL]

efilive

How did you get that?

 

[JLL]

I wonder if the exhaust is leaking somewhere... that would explain all of this. Also explains why it gets wacky once it gets hotter. The leak would have to I guess be before the o2 sensor, so maybe vband?

Sounds like a theory.

 

[JLL]

I can't believe it, but I re positioned the vband on the downpipe and drove around with the evap line unplugged from the purge valve, and everything is normal. So it was one of the two. Will plug it back in and drive around later to see if it returns. If not it was the exhaust leaking.

View attachment 292559

Are you sure that the evap purge solenoid actually opened during your data logging session? If my memory serves me correctly unplugging the EVAP line that connects to the EVAP purge solenoid would create a vacuum leak when the valve opens under intake manifold vacuum.

My thinking could be wrong though. I've only had 1 cup of coffee.

 

[JLL]

No, it just sucks in when that valve opens, this time it took in clean air versus an unassumingly plugged up evap line.

That's a vacuum leak. Isn't it?

Although it may not throw off the fuel trims.

 

[JLL]

Why would it care if it sucks from the charcoal canister or the ambient air? The "leak" you are saying is controlled by the purge valve opening and closing.

I understand that.
My thinking is: If it's fresh air, the air being let into the system is unaccounted for (not measured). Whereas the vapors that come from the fuel tank are accounted for by the ECM via the EVAP fuel tank pressure sensor.

But as I said, I'm not sure if the extra fresh air that is let in by the EVAP purge solenoid opening is enough to throw off the fuel trims.

 

[JLL]

Yeah, IMO it was a piece of junk lol... Sorry to say it. Leaked from day 1. IF, and IF I were to get another one, I would get the new one where you don't have to bore a hole in your plastic manifold that is hard to seal.

That's why I don't have one.

 

[JLL]

Do you just plan to replace the intake manifold every once in a while or just monitor?

I'll just monitor it closely. I may end up replacing the manifold every so often or I've contemplated a RacerX (metal) manifold with a check valve that I select. I just don't like the idea of making modifications to a plastic manifold.

 

[JLL]

It really depends on how careful you were on installation.

That's true for 95% of all repairs or modifications.

 

[JLL]

Still trying to chase this slight miss at cold start idle. I can feel it in the seat as well as if I put my hand on the valve cover. You can hear it if you listen very closely in the exhaust note as well. I am assuming a vacuum leak as I've switched plugs 3 times, gapped them to all sorts of gaps, and threw in another set of fuel injectors and orings. I have no clue what else to check. Seems to run ok, but does surge some under boost, may be normal idk. As usually passes boost test very well. Trying to figure out if this is just normal when it starts up to light off the cat so it's dumping raw fuel in at a high rate.

Vacuum at idle once it idles down from "high idle" after cold start. Settles around 800RPM with -17 vacuum. Does this sound right?
View attachment 293477

-17 in/hg? That sounds about right to me.

 

[JLL]

Yeah me too, it goes -21 or so when driving and coasting.

Mine as well.

 

[JLL]

Went out on the back roads today to do some tune testing. Somehow I am hitting 25+PSI on 3/4 throttle pulls up to 100mph. No limp mode. I ain't complaining, but that's a lot of boost... Under WOT it makes less boost, I don't get that, maybe just how the tune is setup.

It could also be how your boost Guage is plumbed in.

 

[JLL]

It actually reads 1PSI low. I was thinking about what you said when I saw the 25PSI, looked in my rearview mirror to see if I blew the head off. I'll have to log it next time im out, that won't lie. Although I think the boost gauge is right judging by butt dyno.

I didn't think a stock turbo could put out 25 psi.

If it's true, be careful. Your getting into Moradajoe territory.

 

[JLL]

Got a little something new on the way 🤭

View attachment 294530

An intake manifold spacer??? 😆

 

[JLL]

Swapped out the front cv axle today. Boot had a nick in it and was flinging grease. Got a cardone remanufactured oem from rock auto. Seems good quality and installed without issue. 59k miles. The shoe goo held up for almost a year on the old boot lol!
View attachment 294764
View attachment 294765

Grease will stay in a leaking boot for a long time, especially in states that don't use road salt in the winter.

 

[JLL]

Ordered some ACDelco 2173076 injectors this evening, BNR is now supporting tuning on these. Should be a pretty decent upgrade for the price they are!

Cool. Anything ACDelco is cheaper than a "performance upgrade" injector, and probably higher quality most of the time too.

 

[JLL]

Got the new injectors installed. Idles so much smoother and accelerates smoother as well. Duty cycle at WOT is now at 60% or so, when it was going above 100% with other injectors.

View attachment 295066
View attachment 295067

Pretty. Do you know what the max flow rate is?

 

[JLL]

Think I found it here https://www.injectorplanet.com/products/bosch-0280158085

Those are REALLY affordable for a set of 420cc/min (40 lb/hr) injectors.