typical first time SR troubles

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thoughtless
Posts: 116
Joined: Wed Apr 01, 2009 9:13 am
Car: 1997 silvermoss 240sx SE
Location: Clarksville, TN
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i got 99 problems; but a bigitch aint one.

right, to start:

vehicle: 1997 s14a 240sx se, no leather;; SILVERMOSS
motor: kouki S14 SR20det;; confirmed
trans: SR20 5-speed
wiring: "brandnew" Kouki harness from west covina, chopped to shiz but its whatev.
ecu: NA black labeled KOUKI ecu, from CARRISMA motors in ORlando, thanks guys
maf: KA24E soldered right in
aside from full 2.5" straight pipe BRM exhaust and after market pulley the motor is stock
-fmic
-turbo manni
-nismo therm.

troubles:
1-runs pig-rich
2-wont break 5,500revs
3-pours fuel smell out of the tail pipe, the smell came from the oil fill on the valve cover, oil/fuel seeping from the oil pan, and dipstick is def petroled'd out.
4-i hear a fluttering in the hotpipe, the bov is located 4-6 inches from the throttlebody [ive read its better on the cold side] and the cold pipe is also re-circulated.

after cracking a S14 SR fsm, thanks guys, and trolling all over nico, zilvia, freshalloy, and frsports tutorials ive come up with these solutions:
1- kae maf runs higher volts then the sr maf, so this confuses my kouki ecu into dumping fuel to control the air/fuel mixture. but there isnt the same amount of air ACTUALLY flowing into the motor. SO, i am thinking of using a potentiometer/variable resistor from radioshack to cut the volts going from the signal wire[white] to the ecu.
2-the corrected air/fuel mixture should stop the SR from choking on itself
3-change oil, change plugs, seafoam.
4- :gotme

so any additional info, or tips tricks would be appriciated


User avatar
zachattack_5491
Posts: 641
Joined: Sun Jul 13, 2008 8:00 am
Car: Pignose S13 Redtop SR
Location: Albuquerque, NM
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The bottom list with your solutions seem solid. That's certainly a good starting place. However, wouldn't it just be easier to get a new (used) SR MAF? I have an extra from my redtop if they are the same.

EDIT: actually I just re-read the write up on using the SOHC MAF and it looks cheap and simple. Might as well go for it :bigthumb:

User avatar
thoughtless
Posts: 116
Joined: Wed Apr 01, 2009 9:13 am
Car: 1997 silvermoss 240sx SE
Location: Clarksville, TN
Contact:

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if youre interested i will let you know about the potentiometer.

any additional notes/tips would be appreciated.
and i still have no idea about the fluttering sound in my hotpipe/intake area...

User avatar
PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
Contact:

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The "fluttering" sound is most likely compressor surge. This would be caused by your wastegate not actuating. (Vacuum line not hooked up to hotpipe, or it's stuck)

User avatar
JDizzle
Posts: 127
Joined: Wed Jul 14, 2004 12:52 pm
Car: 1995 Nissan 240SX

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^you mean blow off valve?

what blow off valve are you running? check vacuum lines like said above and be sure you're running the correct spring if it's a Tial. To clarify, you're running a kouki NA ECU on a kouki sr20det motor? No tuning at all?

You may have major issues if you have fuel in your oil pan. That's whole lot of fuel, it's probably washing the oil off your cylinder walls and passing by your piston rings. Get nistune or something to tune your ECU with and pick up a Z32 MAF.


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