Help! LTFT at -14 on TSP1 with K&N Intake

[Burgerstandman]

I just got the TSP1 tune on Hondata for SI and my LTFT got down to -14 at one point. I have the K&N SRI ...I know it’s not the greatest but I didn’t do enough research before I bought it. Is this bad or am I over reacting? Is there a way to adjust. I’m a noob btw

@DerekRobinson

Sponsored

 

[kshawn]

Check for boost leaks. You could have a loose hose

 

[silverblip]

 

[kshawn]

If it was a +14 I'd agree

 

[Burgerstandman]

Check for boost leaks. You could have a loose hose

It holds pressure still gets up to 25-26 psi

 

[Burgerstandman]

Check for boost leaks. You could have a loose hose

It really only gets that way when I’m in boost. Does -14 mean rich or lean?

 

[Burgerstandman]

Funny but not helpful still laughing though

 

[gtman]

It really only gets that way when I’m in boost. Does -14 mean rich or lean?

Negative numbers mean running rich.

If your LTFT was at -14, where were your STFT numbers at?

 

[Burgerstandman]

I'm guessing you mean short term fuel trim then. Negative numbers mean running rich.

So my drive wasn’t very long like maybe 10min or so and it seamed to only get there on the Long Term Fuel Trim for a good 1/4 mile after I did a little pull and let off. Usually during normal driving my LTFT stays right at -10

 

[kshawn]

STFT is real time. LTFT is kinda like an average. For STFT, If your running super negative or super positive while In boost something's off.

While regular driving STFT will swing wildly in both directions sometimes, this is normal.

 

[silverblip]

Funny but not helpful still laughing though

That's all it was meant to do...

 

[Burgerstandman]

STFT is real time. LTFT is kinda like an average. For STFT, If your running super negative or super positive while In boost something's off.

While regular driving STFT will swing wildly in both directions sometimes, this is normal.

I’ll try and upload a data log in a while so you can see what I mean. STFT does swing wildly but will level out at around -8 to -10 but then I’ll do a little pull in second gear and during the pull it gets down to -4 or -6. The scary part is right when I let off and drive normal after that I’ll get LTFT -14 to -18 for a good few seconds before it levels back out. I appreciate the feedback your giving me. I’ll go double check hoses and everything in a bit and then do a data log. Also I’ll make sure to drive longer to get an accurate LTFT

 

[NikkoPH]

Tune your AFM!

 

[Burgerstandman]

Tune your AFM!

Do you know if I can do that with the TSP stage 1 Tune? Also I’m a noob so how would I do that? Any tips?

 

[kshawn]

I’ll try and upload a data log in a while so you can see what I mean. STFT does swing wildly but will level out at around -8 to -10 but then I’ll do a little pull in second gear and during the pull it gets down to -4 or -6. The scary part is right when I let off and drive normal after that I’ll get LTFT -14 to -18 for a good few seconds before it levels back out. I appreciate the feedback your giving me. I’ll go double check hoses and everything in a bit and then do a data log. Also I’ll make sure to drive longer to get an accurate LTFT

Letting off and seeing it go rich is normal. -4 to -6 isn't that bad, anything 10 or over and I start to worry. Sounds like you need a tune for that intake. I'd still check for boost leaks l, just to be safe

Sponsored