Just swapped in sr20, running rich... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

247sxy · 09-03-2010, 06:21 PM

I just swapped a stock sr20det into my 93 coupe.
I have the usual mod's
- apex'i intake
- Greddy spec ls intercooler
- hks downpipe
- brm exhaust
- greddy rs bov
- walbro pump
- basic maintenance; new belts, plugs, oil pan, waterpump.

Anyway back to the problem. It ran fine in the garage, started great every time. The problem started when i began driving it the first few times. It boosts fine, pulls hard, idles fine, it runs the way it should... except it's rich. It's now hard starting sometimes, like it's being flooded. Smells like unburnt fuel when driving. Black soot on the bumper.
The car still runs and drives fine, its just rich....

My first thoughts is the fpr or coolant temp sensor, but i don't want to go spend money unless i have to.

Does this sound familiar to anyone? Any help would be appreciated.

Sileighty_85 · 09-03-2010, 07:10 PM

coolant temp sensor its like 20 bucks

Or just pull codes from the ECU

I LUV MY S13 · 09-03-2010, 07:16 PM

pressure gauge, multimeter...so many tools you can use for proper diagnoses

247sxy · 09-03-2010, 07:17 PM

Ok thanks i'll try pulling codes first, I think i saw a write up on how to do that here.

247sxy · 09-03-2010, 07:20 PM

I'm guessing the pressure gage for fuel pressure, and the multimeter for tps? And the stock fuel pressure is 43.5...

I LUV MY S13 · 09-03-2010, 07:50 PM

I doubt its your fpr, if you had too little pressure it would just cause your engine to shut off and too much would cause a ruptured hose or something.

247sxy · 09-04-2010, 04:00 AM

I can hear the bov whistling every once and a while at low rpm, i think this could be it. It's a GReddy RS venting to the atmosphere. Can i just adjust it, or is it f*cked?

09-03-2010, 06:21 PM	#1
247sxy Join Date: Feb 2010 Location: Canada Age: 35 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	Just swapped in sr20, running rich... I just swapped a stock sr20det into my 93 coupe. I have the usual mod's - apex'i intake - Greddy spec ls intercooler - hks downpipe - brm exhaust - greddy rs bov - walbro pump - basic maintenance; new belts, plugs, oil pan, waterpump. Anyway back to the problem. It ran fine in the garage, started great every time. The problem started when i began driving it the first few times. It boosts fine, pulls hard, idles fine, it runs the way it should... except it's rich. It's now hard starting sometimes, like it's being flooded. Smells like unburnt fuel when driving. Black soot on the bumper. The car still runs and drives fine, its just rich.... My first thoughts is the fpr or coolant temp sensor, but i don't want to go spend money unless i have to. Does this sound familiar to anyone? Any help would be appreciated.

09-03-2010, 07:10 PM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	coolant temp sensor its like 20 bucks Or just pull codes from the ECU __________________ 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

09-03-2010, 07:16 PM	#3
I LUV MY S13 Post Whore! Join Date: Dec 2008 Location: Norwalk, Los Angeles Age: 32 Posts: 3,349 Trader Rating: (35) Rides Gallery: I LUV MY S13 Feedback Score: 35 reviews	pressure gauge, multimeter...so many tools you can use for proper diagnoses __________________ -Jorge

09-03-2010, 07:50 PM	#6
I LUV MY S13 Post Whore! Join Date: Dec 2008 Location: Norwalk, Los Angeles Age: 32 Posts: 3,349 Trader Rating: (35) Rides Gallery: I LUV MY S13 Feedback Score: 35 reviews	I doubt its your fpr, if you had too little pressure it would just cause your engine to shut off and too much would cause a ruptured hose or something. __________________ -Jorge

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09-03-2010, 07:17 PM	#4
247sxy Join Date: Feb 2010 Location: Canada Age: 35 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	Ok thanks i'll try pulling codes first, I think i saw a write up on how to do that here.

09-03-2010, 07:20 PM	#5
247sxy Join Date: Feb 2010 Location: Canada Age: 35 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	I'm guessing the pressure gage for fuel pressure, and the multimeter for tps? And the stock fuel pressure is 43.5...

09-04-2010, 04:00 AM	#7
247sxy Join Date: Feb 2010 Location: Canada Age: 35 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	I can hear the bov whistling every once and a while at low rpm, i think this could be it. It's a GReddy RS venting to the atmosphere. Can i just adjust it, or is it f*cked?