Lean and rich sr20det issue

[bmar19]

Ok so I have the wiring specialties pro harness, s13 sr blacktop in my s14

The maf plug has a grounding wire...whenever I ground it the car idles super lean..sometimes stalls when i stop or just picks itself up but its definitly a rough idle...cruises around 15 air...in boost it will be from low 13's and 12s sometimes 11.8...

Now If i disconnect the maf ground my car idles at 13.8 and 14.5 but even light touch to the throttle it runs very rich ..... and in boost it breaks up

battery is in the trunk...positive running to the starter...negative runs to the transmission (I'm changing that) cables are on the way

Spark plugs are gapped to .028, injectors are good, coil packs are all good

will check maf and 02 sensor tomorrow

I do have a gas leak in my tank passenger side by the strap.


Any info or insight would be appreciated...its just bothering a bit even with maf grounded car doesn't feel powerful, vacuum is -18. I do have a small exhaust leak but this isn't a false lean reading

Mods: isis3871, enthalpy ecu, Bov hks non-recirculated...if you need more info just ask

thanks!

[Tyler_240]

15 AFR isn't that lean at cruise, especially off throttle its going to pull fuel... if your WOT is 13 that is lean for sure, but 11.8 is perfect...are you datalogging this or trying to watch the AFR Gauge? Watching it is not going to work for you...

I would verify your base timing and your vacuum seems a little low, maybe you have a boost leak. I usually pull minimum of -20 at idle

I would follow the frsport guide and double check your timing...if you haven't gotten a tune since the mail order ecu, I would definitely recommend it...it is not going to be 100% precision like a standalone

[bmar19]

yes I'm dattalogging...its in the low 13s and high 12s..sometimes its goes 11.8 which is good... but its mostly high 12s low 13s..

the only thing I'm worried about is the idle and WOT

timing is at 15 ill look into the frsport guide as well