running really rich

[mr_nissan]

got some rich running issues i have the stock fpr on my sr and on my aem wideband it says im running 13.7/8 at idle roughly in that area not to mention when im just lightly driving no boost its about 10.8 and lower i was wondering if its a fpr problem its been like this for awhile getting about 10mpg and it sucks being its my daily driver. anyone have a idea?

[buster415]

do you have a tune on the ecu? or any other mods like a walbro 255 fuel pump?

[mr_nissan]

s15 turbo, stock ecu, walboro 255, fmic, 3" exhaust

[mr_nissan]

anyone?

[david200095367]

have you checked for boost or vacuum leaks?

[1992hatch]

i've got the same problem im doing a boost leak test today

[chad300zx1990]

check tps, maf, boost leaks, coolant temp sensor (the one for the ecu, the two wire one) or the fuel pressure reg.

all of these can make the car run rich if they're bad or there is a wiring issue with one of them.hope this helps

[mr_nissan]

i did do a boost leak test i filled it with air from the turbo inlet and as soon as i stop feeding air it will leak out pretty quick then slow down around 5psi but there is no leaks from the couplers all the t-bolts are tight idk where the air can be going but i sprayed soapy water everywhere and no leaks the throttle plate is closed too is it normal for the pressure to drop like that?

[dc1984]

might be ur intercooler. sometimes they just start leaking air, aint much u can do about it. dont know how to confirm it either.