SR running too rich out of nowhere - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

starkos14 · 09-25-2007, 06:23 PM

so I'm having trouble figuring out my issue with running rich. here's the story if it might have anything to do with the problem. my clutch died and my car was running perfect. so we pulled the tranny and i ordered a new clutch. during the clutch install. the car had the battery disconnected for 4 days and we almost completely dropped the subframe due to my solid motor mounts. so we get everything back together and i go to test drive the car with the new clutch and before i know it, the car is hesitating. i let the car warm up first btw. and now im just pouring black smoke and fuel. my plugs died. i cleaned my coil packs, tested them and all the plugs were replaced and they all get spark too. i checked the afc if i was getting signals from the maf, and they looked normal. so i dont think its the maf. i pulled the fuel rail and checked to see if any of the injectors were leaking, and they weren't. this is basically where i am right now and im still pissing gas out the exhaust. im sure its not oil either. sputtering is between 2500 and 4500 rpm. driving or revving

my current setup thats relevant to this issue:

t28
550cc injectors
z32 maf
daughterboard chip for z32 maf, t28 and 550's
apexi afc neo for fine tuning

statik · 09-25-2007, 06:34 PM

What happens if you unplug the maf? Also, make sure the ecu is ok, check to see if the daughter board didnt come loose, it almost sounds like running on an ECU with no rom. If you have a consult hook it up and pull codes, see whats going on.

starkos14 · 09-25-2007, 06:47 PM

no consult. and idle gets rougher without the maf, so im sure it works. i agree about losing the tune, but only static electicity would erase the daughter board tune. and i doubt it came loose. ill check tho.

Sileighty_85 · 09-26-2007, 07:30 AM

check ECU for Code and check you CAS it might have died mine just recently did for no reason

Sil-Eighty SE-K · 09-26-2007, 07:09 PM

flow test injectors.... i bet you got one sticking

smelly240 · 09-26-2007, 08:45 PM

check all of your couplers - maybe a leak?

starkos14 · 09-26-2007, 08:58 PM

injectors are fine. no loose couplers, the car actually runs better when in boost. ill be checking the codes next

starkos14 · 10-01-2007, 11:54 AM

so ive been doing all this reading on my car this past week and i finally go to check my engine codes at my friends house where my car has been, and my one friends came along to check out the situation. the car fired right up and now runs perfect. and i didnt do shit. wtf... next time this happens, im checking codes right away. i think a sensor is probably about to go.

starkos14 · 11-09-2007, 06:54 AM

so the problem came back... went to check codes and my mines ecu doesnt have the led... awesome. replaced the cts and i still have the problem. any other ideas?

Megadang · 11-09-2007, 07:03 AM

O2 sensor? I had a similar problem, and the car sounded like a WRX. Spraying gasoline out the exhaust. I replaced my O2 sensor and it ran fine afterwards.

starkos14 · 11-09-2007, 07:28 AM

btw, im sure its a sensor issue

starkos14 · 11-09-2007, 07:29 AM

i guess its time to try that next

09-25-2007, 06:23 PM	#1
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	SR running too rich out of nowhere so I'm having trouble figuring out my issue with running rich. here's the story if it might have anything to do with the problem. my clutch died and my car was running perfect. so we pulled the tranny and i ordered a new clutch. during the clutch install. the car had the battery disconnected for 4 days and we almost completely dropped the subframe due to my solid motor mounts. so we get everything back together and i go to test drive the car with the new clutch and before i know it, the car is hesitating. i let the car warm up first btw. and now im just pouring black smoke and fuel. my plugs died. i cleaned my coil packs, tested them and all the plugs were replaced and they all get spark too. i checked the afc if i was getting signals from the maf, and they looked normal. so i dont think its the maf. i pulled the fuel rail and checked to see if any of the injectors were leaking, and they weren't. this is basically where i am right now and im still pissing gas out the exhaust. im sure its not oil either. sputtering is between 2500 and 4500 rpm. driving or revving my current setup thats relevant to this issue: t28 550cc injectors z32 maf daughterboard chip for z32 maf, t28 and 550's apexi afc neo for fine tuning

09-25-2007, 06:34 PM	#2
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 40 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	What happens if you unplug the maf? Also, make sure the ecu is ok, check to see if the daughter board didnt come loose, it almost sounds like running on an ECU with no rom. If you have a consult hook it up and pull codes, see whats going on. __________________ 97 240sx esaarr \| Current Status: SOLD

09-26-2007, 07:30 AM	#4
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	check ECU for Code and check you CAS it might have died mine just recently did for no reason __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

09-26-2007, 08:45 PM	#6
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 47 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	check all of your couplers - maybe a leak? __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

11-09-2007, 07:03 AM	#10
Megadang Leaky Injector Join Date: Feb 2003 Location: 408 Age: 40 Posts: 90 Trader Rating: (0) Feedback Score: 0 reviews	O2 sensor? I had a similar problem, and the car sounded like a WRX. Spraying gasoline out the exhaust. I replaced my O2 sensor and it ran fine afterwards. __________________ 89 fastback, Redtop Sr, Arc Bov, Hks Super mega flow intake, Tein Ha's, Advan ART's

09-25-2007, 06:47 PM	#3
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	no consult. and idle gets rougher without the maf, so im sure it works. i agree about losing the tune, but only static electicity would erase the daughter board tune. and i doubt it came loose. ill check tho.

09-26-2007, 08:58 PM	#7
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	injectors are fine. no loose couplers, the car actually runs better when in boost. ill be checking the codes next

10-01-2007, 11:54 AM	#8
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	so ive been doing all this reading on my car this past week and i finally go to check my engine codes at my friends house where my car has been, and my one friends came along to check out the situation. the car fired right up and now runs perfect. and i didnt do shit. wtf... next time this happens, im checking codes right away. i think a sensor is probably about to go.

11-09-2007, 06:54 AM	#9
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	so the problem came back... went to check codes and my mines ecu doesnt have the led... awesome. replaced the cts and i still have the problem. any other ideas?

11-09-2007, 07:28 AM	#11
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	btw, im sure its a sensor issue

11-09-2007, 07:29 AM	#12
starkos14 Zilvia Member Join Date: Nov 2005 Location: CO Age: 40 Posts: 225 Trader Rating: (3) Feedback Score: 3 reviews	i guess its time to try that next

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