sr20det redtop problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

2.0-TURBOcoupe · 11-12-2006, 10:12 PM

i just installed a sr20det in my friends car and i started it up and it kind of idled rough maybe due to a vacuum leak but it smoked (fuel smoke) and i revved it up and i misses somewhere around 2,500 rpm or so. i reset the timing. tried a different MAF. changed out the ECU. he has and upgraded o2 housing and we couldnt run the stock o2 sensor so we bought a universal Bosch o2 and spliced into the wiring. someone told me that the o2 sensor could be wired up wrong or the TPS could be reading a funky voltage. i have heard that the 255 walbro could be dumping too much fuel. i dont know where to go and im running out of options. if anyone has any suggestions please let me know.

KwKouki · 11-12-2006, 10:20 PM

What size injectors are you running? Check to see if one of the o-rings isnt squashed. Are you running SAFCII? My car did the same exact thing witht he SAFCII, it was wired wrong. The SECOND we took it off the ECU it fired up perfectly.

2.0-TURBOcoupe · 11-12-2006, 10:42 PM

i had the safc2 but i sold it cuz i could never figure out how to set the in and out settings. but im running the mines tuned ECU.

KwKouki · 11-13-2006, 01:24 AM

make sure all the wires going to the ECU are connected properly. Sounds like a MAF issue.

samplesurf · 11-13-2006, 01:39 AM

im not running a o2 sensor and it runs fine according to my wideband, although the problem u r describing sounds similar to something that happened when my tps was slightly disconnected, id try fiddling with it or replacing it

2.0-TURBOcoupe · 11-13-2006, 01:45 PM

the TPS is connected securely but i think it might be reading an incorrect voltage. i have tried two different sr MAFs but still the same result.

11-12-2006, 10:12 PM	#1
2.0-TURBOcoupe Leaky Injector Join Date: Nov 2006 Location: tennessee Age: 38 Posts: 144 Trader Rating: (1) Feedback Score: 1 reviews	sr20det redtop problem i just installed a sr20det in my friends car and i started it up and it kind of idled rough maybe due to a vacuum leak but it smoked (fuel smoke) and i revved it up and i misses somewhere around 2,500 rpm or so. i reset the timing. tried a different MAF. changed out the ECU. he has and upgraded o2 housing and we couldnt run the stock o2 sensor so we bought a universal Bosch o2 and spliced into the wiring. someone told me that the o2 sensor could be wired up wrong or the TPS could be reading a funky voltage. i have heard that the 255 walbro could be dumping too much fuel. i dont know where to go and im running out of options. if anyone has any suggestions please let me know.

11-12-2006, 10:20 PM	#2
KwKouki Nissanaholic! Join Date: Apr 2003 Location: Key West, FL Age: 44 Posts: 2,212 Trader Rating: (6) Feedback Score: 6 reviews	What size injectors are you running? Check to see if one of the o-rings isnt squashed. Are you running SAFCII? My car did the same exact thing witht he SAFCII, it was wired wrong. The SECOND we took it off the ECU it fired up perfectly. __________________

11-13-2006, 01:24 AM	#4
KwKouki Nissanaholic! Join Date: Apr 2003 Location: Key West, FL Age: 44 Posts: 2,212 Trader Rating: (6) Feedback Score: 6 reviews	make sure all the wires going to the ECU are connected properly. Sounds like a MAF issue. __________________

11-12-2006, 10:42 PM	#3
2.0-TURBOcoupe Leaky Injector Join Date: Nov 2006 Location: tennessee Age: 38 Posts: 144 Trader Rating: (1) Feedback Score: 1 reviews	i had the safc2 but i sold it cuz i could never figure out how to set the in and out settings. but im running the mines tuned ECU.

11-13-2006, 01:39 AM	#5
samplesurf Zilvia Member Join Date: Jul 2006 Location: houston tx Posts: 230 Trader Rating: (0) Feedback Score: 0 reviews	im not running a o2 sensor and it runs fine according to my wideband, although the problem u r describing sounds similar to something that happened when my tps was slightly disconnected, id try fiddling with it or replacing it

11-13-2006, 01:45 PM	#6
2.0-TURBOcoupe Leaky Injector Join Date: Nov 2006 Location: tennessee Age: 38 Posts: 144 Trader Rating: (1) Feedback Score: 1 reviews	the TPS is connected securely but i think it might be reading an incorrect voltage. i have tried two different sr MAFs but still the same result.