Hi Al. I wanted to say thank you again for the mail in flash, cause I love it and it works great. You did a great job and I appreciate it.

I do have a question though, and I am really hoping you can answer it cause I am at a loss.

I had my ecu flashed with all of my mods. I installed larger injectors afterwards and had it tuned. I know you don't approve of larger injectors until you get a bigger turbo....so you don' have to say antyhing on that topic

But, I installed them and had them tuned. Ever since I have had the larger injectors on (and having it tuned out with an SAFC) I have been receiving CEL with a code of Lean bank one.

The first time I sent the injectors off cause I thought it was the injectors causing me to go lean. But I received brand new ones back, installed them and had it tuned.

I received a check engine light again. It says lean bank one. but my a/f ratios throughout the tune or no less than 11.7:1. So I know I am not lean.

Is the flash affecting the ECU thinking that because of the larger injectors and pulling out fuel that it thinks it is lean. I am really confused. I could retune it with the stock injectors, but I think I will still get that code.

Any help on this would be great. If I need to post the tune I will. I just don't want the check engine light on, and I don't believe it is lean.

Anyone else can comment as well.

I am not bashing Al or his flash....cause I love it and wouldn't change it. just wanted some answers.....cause I am really confused.

 

Why is it you installed larger injectors if they weren't needed? and after you already had a flash for the mods you have prior to the injectors? That part confuses me....

 

preparing for future mods like cams, gears, and maybe 20G turbo.

 

That doesn't make sense. You don't "prepare" for later mods by installing injectors now. You install them when you need them. You're just hurting yourself adding injectors AFTER a flash that isn't scaled for injectors. The SAFC isn't good enough to make you run properly like that. You should just re-install the stock injectors and hang onto the upgraded ones until you get the 20g. Hell, even with cams you don't need them.

They are absolutely zero help and appear to be hurting you, so why use them?

 

And I understand all of that.


But why would it still create the CEL? If an SAFC can tune it for the A/F ratio's and if the graphs show that it is still rich, why would it set a CEL for being to lean??

minus the rest of the should have and shouldn't have's.

The reason I ask, is I have other friends who have the flash and did the same thing, added injectors, and they did not have any problems.

I am sure I will just go back to stock injectors....but I am trying to find an reason of why it is doing this in the first place.

 

I was getting the CEL at idle. 1082 rpms, and I wasn't even moving. This has to deal with the short term fuel trim does it not???

Can that even be cured??

 

Yes it can be cured. Add about 4-5% of fuel at idle.
But if I were you I would put stockers back in.
You have to also remember that the injector values are not linearly correlating with another set of injectors.

 

Yes, this is not about tuning at WOT. This is about injector scaling - getting your closed-loop operation where it should be.

 

I'll just go back to stock injectors....and get it re-tuned.

I was just hoping that it worked for me, since it worked for the rest of my friends who had flashes and larger injectors.

It's just a bummer. Oh well. Any one want to buy relatively new 720cc injectors??

 

Keep them for your later turbo upgrade. Isn't that why you got them?

Btw, what do you mean by "it worked" for your friends? There's no reason to add injectors and try to re-tune with an SAFC on top of a flash anyway, so I'm not sure what "worked." I don't see any other fast Evos running around here, especially not at Bandi, so I'm curious as to what you mean. What benefit did they get from adding injectors that weren't needed?

 

my friend k-five had his ecu flashed with all of his mods by a mail in flash from Al. He then added 780's, cams, and gears and then had it tuned out with an SAFC. He made almost 400 corrected whp and ran a 12.3 at bandi. It worked just fine for him, and no check engine lights for being too lean.....plus his injectors were larger than my 720's. So it just doesn't make sense.

I am not arguing the fact that I should go back to stock injectors, cause I will just cause I don't want the stupid CEL on......but there should be no reason that my car is leaner...espescially with larger injectors and a tuned A/F ratio of basically 11.5:1. I was just trying to find an answer as to why? cause it worked for other people.

 

would having a utec, change that? since you can control timing.....would a UTEC fix the problem......cause maybe that is where my ECU is confused....larger injectors and still the same timing.

 

He could have done the same thing without injectors, though. I don't see why people are adding injectors then using an SAFC to retune instead of getting properly flashed. It's senseless...

I'd love to see this K5 run 12.3s, because I haven't seen another Evo (or any regular import) run well like that. He needs to come back out to the track, because it's been embarassing both times I went.

 

A UTEC can tune you, yes, but that's just another huge expense for nothing.

 

You won't see him up there anymore, cause he sold the evo, but I was there when he ran it. He hit a 1.68 60' and hit at 12.34 . He said his turbo was pretty maxed out after that. It was fun to watch.

Thanks for you help though. It's just frustrating. Oh well back to stock injectors and I will get it re-tuned.

thanks again for everyone's help