K&N intake and air/fuel reading on 2013 Shelby

[moD]

After installing my K&N intake with no tune I started to take notice of my air/fuel reading at idle my reading is mostly at 14.1 but fluctuates down to around 13.1 and back up. At WOT it goes down to 11z and then shoots up all the way to 20 and back down to steady 14z as I let go of the gas. Is this normal or ok ? Just curious because I like to really understand the details of how my car is running and I'm trying to avoid the stock intake back on just to compare.

Also I just started to realize when pulling up and stop at a traffic light my rpm goes down to 1000 and stays there for a sec before going lower to idle did not notice this before

Third for some reason all of the sudden on normal acceleration from 0 on first gear it feels like my rpm climbs slower up to 2500 and then picks up where is before it would shoot up from start, there for I would get that power launch feeling with out having to rev it before launching

Could it be I have an air leak somewhere ?

Any clarification on these concerns Would be greatly appreciated

I'm sure it could be nothing and maybe I'm just exaggerating but its still good to know

Ow and check out my video after the modifications


http://www.youtube.com/watch?v=jzjpv6bfjzU&sns=em

 

[me32]

If the intake changes the maf size or location it would likely need a tune for the car to run proper

 

[Devious_Snake]

It sounds like the intake is affecting the air flow/ fuel ratio....might want to have it checked. I bet a good tune would take care of that and yield some more power anyway

 

[NewYorkJon34]

Very nice video & the photos at the end were very well done

 

[king Abdull]

Sir. Is your filter got screen in it to smooth the air for the mass air .. ?
if it doesn't got screen.. ! That might be your trouble..

 

[moD]

It turns out my air filter came loose and was kind of off. I believe this was causing an issue with the air flow sensor and maybe that why something felt weird. Any ways tighten it back up and every thing seems fine now back to normal.

but I am still queries about the air/fuel ration reading. if it is the same with a stock intake system as the readings I explained above

 

[Lethalchem]

An A/F ratio reading of "20" is NOT a good thing! At least not in any car I've ever owned. If it's still reading that after you fixed your leak I would stay out of boost until you get that thing tuned or you'll be expensively sorry.

 

[moD]

An A/F ratio reading of "20" is NOT a good thing! At least not in any car I've ever owned. If it's still reading that after you fixed your leak I would stay out of boost until you get that thing tuned or you'll be expensively sorry.

thanks for your input

it only goes up to 20 after i let go of the pedal from WOT and then it comes back down. I thought i saw this happen another stock Shelby

anyways if you got a stock 2013 shelby i would really appreciate if you would confirm

 

[Colleton]

IIRC, people have had issues with the K&N filters on these cars going all the way back to the '07-'09 MY?

 

[H-TownMachI]

Your A/F sounds normal to me. Idle should be in the 14's and WOT should be in the 11's. Let off the throttle it will go to 20.

 

[Lethalchem]

thanks for your input

it only goes up to 20 after i let go of the pedal from WOT and then it comes back down. I thought i saw this happen another stock Shelby

anyways if you got a stock 2013 shelby i would really appreciate if you would confirm

Your A/F sounds normal to me. Idle should be in the 14's and WOT should be in the 11's. Let off the throttle it will go to 20.

Yeah, I must have misread it. I thought you were hitting 20 while WOT. :bash:

 

[JDJ]

one of the few places that the Goodyear tires hookup Nice video