PROBLEMS: running too rich

[UNISA JECS]

Yea the 255 fuel pump bumped up your fuel pressure, usually about 6psi+ in most cases, this will makes yoru fuel injectors larger than what they really are by the square root old vs new fuel pressure.

Sounds like your wideband has fouled out by running to rich, I use teh Innovate LM-2 so im not talking out my ass....in overly rich running the wideband will output some crazy lean numbers when in fact you are really running to rich.

You need to get a fuel pressure gauge and adjustable fuel pressure reg. if you want to get your car running back to normal again.

Sounds like your wideband is funny now, I suggest trying to recalibrate it, if that still doesn;t work you can try cleaning it with propane torch nicely and evenly moving it around, dotn concentrate in one area.

[HS13KLS]

Originally Posted by neilsan

"hurr i installed a afc and now my car runs like crap"

why do people assume they need an afc anyway? if you want to learn how to tune you'd better understand the effect that messing with maf voltage has on ignition timing maps.

get rid of that ricer chic' piece of shit pseudo tuning tool and just get a rom tune for anything that you actually need tuning for (big injectors, z32 maf).

if you didnt read my post. iam getting an sr. so i had it in advance. and it was taking of closet space. so i figured id use it. and btw i do have a z32 maf...but just not on right now.. i dont see the point in running it right now

Originally Posted by UNISA JECS

Yea the 255 fuel pump bumped up your fuel pressure, usually about 6psi+ in most cases, this will makes yoru fuel injectors larger than what they really are by the square root old vs new fuel pressure.

Sounds like your wideband has fouled out by running to rich, I use teh Innovate LM-2 so im not talking out my ass....in overly rich running the wideband will output some crazy lean numbers when in fact you are really running to rich.

You need to get a fuel pressure gauge and adjustable fuel pressure reg. if you want to get your car running back to normal again.

Sounds like your wideband is funny now, I suggest trying to recalibrate it, if that still doesn;t work you can try cleaning it with propane torch nicely and evenly moving it around, dotn concentrate in one area.

i have a LC-1
i forgot to mention i re calibrated it. and it seems to be working fine. as for the 255 pump..that, the z32 fuel filter, afc have been on my car for MONTHS..probably since april ish. so its not like i JUST put these thigns on my car, and now it runs like shit. these are parts that have been on for a while. and all of a sudden it happened.
and when i said it was running lean like it hit that crazy 18-20 that was only for about 3 actual seconds..a lot longer than just me shifting and noticing it though. it was running at that.
as for the fpr, and guage. my buddy has one on his gsr, and he also put a 255 on his car. and it ran pretty rich after he did. he said his bumped up about 10 pounds.

i mean i dont know what else to do. my spark plugs are almost fouled out..pretty black from probably running so rich.. but im trying to think of anything else it could possibly be.., its not like it runs terrible..it just runs REALLY REALLY rich..