S13 SR blacktop [startup problem]? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*silverman182* · 06-28-2009, 07:19 PM

So i have a blacktop sr20det has full turbo back exhaust,stock smic,and piping,greddy type r bov,manual boost controller and walbro 255 fuel pump...

This seems to always happen on cold startups or randomly sometimes...
when i go to startup the car it starts and idle/bogs like at 300-450 rpm then dies

i have to start it about 4-5 times sometimes before it starts and idles good! after it starts it runs perfect spools nice everything....

anyone might know what i can do to solve this problem any help will be much appreciated

when it starts i have a vaccum of 18 so seems liike vaccum should be ok..
battery is good.. fuel pump sounds fine..

NISSAN GUY · 06-28-2009, 07:57 PM

have you checked the Fuel pressure regulator?

sometimes if they are getting old they will allow the pressure to not build up and cause a rough start up.

Sileighty_85 · 06-28-2009, 08:02 PM

Check ECU for codes
But sounds like the Coolant Temp Sensor

*silverman182* · 06-28-2009, 11:35 PM

i threw on a redtop ecu because mine has no led light and it ran a code 55 which i believe means no error...

and too check the fuel regulator.. how would i check that??

*silverman182* · 06-29-2009, 02:51 PM

bumpp... anyone know how i would check my FUEL PRESSURE REGULATOR?

bigcisco62 · 07-02-2009, 02:21 AM

im hving the same problem with my redtop..... idk y its has trouble starting up....

*silverman182* · 08-02-2009, 05:05 PM

so i still get problems at cold start ups! the car will turn on and stumble around 400-500 rpms then after about 4-5seconds it shoots up to 1100 and its fine!!

any ideas on what it could be? i knw its suppose to start up right away!!

someone mentioned fuel regulator! how would i check that?

i also have a vaccum of 20 does that matter? isn't suppose to be 18?

thanks in advance

BlackTopS13 · 08-05-2009, 08:40 PM

I don't have all the info as i am just an apprentice, but if your running a stock reg or any vacuum operated unit you can use a vacuum pump and see if it hold vacuum. Also if the fuel rail you are using has a shrader valve on it you can hook up a fuel pressure gauge and watch it at start up. Good luck!

steve shadows · 08-05-2009, 09:01 PM

loosen the IACV screw so your motor can pre-suck some air into the IM to keep it idleing while in it's cold idle session

*silverman182* · 08-18-2009, 10:56 AM

so could it be a fuel problem? cause if i hold the gas pedal down and start it it starts!

06-28-2009, 07:19 PM	#1
silverman182 JdRft. Jdm Concepts Join Date: Mar 2007 Location: Socal Posts: 506 Trader Rating: (14)	S13 SR blacktop [startup problem]? So i have a blacktop sr20det has full turbo back exhaust,stock smic,and piping,greddy type r bov,manual boost controller and walbro 255 fuel pump... This seems to always happen on cold startups or randomly sometimes... when i go to startup the car it starts and idle/bogs like at 300-450 rpm then dies i have to start it about 4-5 times sometimes before it starts and idles good! after it starts it runs perfect spools nice everything.... anyone might know what i can do to solve this problem any help will be much appreciated when it starts i have a vaccum of 18 so seems liike vaccum should be ok.. battery is good.. fuel pump sounds fine.. __________________ *sounds like a trex lives under my hood*

06-28-2009, 08:02 PM	#3
Sileighty_85 Nissanaholic! Join Date: Dec 2006 Location: Wishing Back in Okinawa -_- Posts: 2,323 Trader Rating: (0)	Check ECU for codes But sounds like the Coolant Temp Sensor __________________ 後輪駆動車１番 1991 Built SR GT2871R -363whp 1998 S14 W/RB25- Rebuild in Progress

06-28-2009, 11:35 PM	#4
silverman182 JdRft. Jdm Concepts Join Date: Mar 2007 Location: Socal Posts: 506 Trader Rating: (14)	i threw on a redtop ecu because mine has no led light and it ran a code 55 which i believe means no error... and too check the fuel regulator.. how would i check that?? __________________ *sounds like a trex lives under my hood*

06-29-2009, 02:51 PM	#5
silverman182 JdRft. Jdm Concepts Join Date: Mar 2007 Location: Socal Posts: 506 Trader Rating: (14)	bumpp... anyone know how i would check my *FUEL PRESSURE REGULATOR? __________________ sounds like a trex lives under my hood*

08-02-2009, 05:05 PM	#7
silverman182 JdRft. Jdm Concepts Join Date: Mar 2007 Location: Socal Posts: 506 Trader Rating: (14)	so i still get problems at cold start ups! the car will turn on and stumble around 400-500 rpms then after about 4-5seconds it shoots up to 1100 and its fine!! any ideas on what it could be? i knw its suppose to start up right away!! someone mentioned fuel regulator! how would i check that? i also have a vaccum of 20 does that matter? isn't suppose to be 18? thanks in advance __________________ *sounds like a trex lives under my hood* Last edited by silverman182; 08-02-2009 at 05:36 PM.

Sponsored Links
Remove these by purchasing a Premium Membership with Zilvia.net!

06-28-2009, 07:57 PM	#2
NISSAN GUY Join Date: Jun 2009 Location: minnesota Age: 21 Posts: 12 Trader Rating: (0)	have you checked the Fuel pressure regulator? sometimes if they are getting old they will allow the pressure to not build up and cause a rough start up.

07-02-2009, 02:21 AM	#6
bigcisco62 Leaky Injector Join Date: Feb 2009 Location: Oxnard, Cali Age: 20 Posts: 58 Trader Rating: (2)	im hving the same problem with my redtop..... idk y its has trouble starting up....

08-05-2009, 08:40 PM	#8
BlackTopS13 Join Date: Jun 2009 Location: Vancouver Age: 26 Posts: 3 Trader Rating: (0)	I don't have all the info as i am just an apprentice, but if your running a stock reg or any vacuum operated unit you can use a vacuum pump and see if it hold vacuum. Also if the fuel rail you are using has a shrader valve on it you can hook up a fuel pressure gauge and watch it at start up. Good luck!

08-05-2009, 09:01 PM	#9
steve shadows In time-out for misbehaving. Join Date: Aug 2003 Location: LA and OC Posts: 7,409 Trader Rating: (3)	loosen the IACV screw so your motor can pre-suck some air into the IM to keep it idleing while in it's cold idle session

08-18-2009, 10:56 AM	#10
silverman182 JdRft. Jdm Concepts Join Date: Mar 2007 Location: Socal Posts: 506 Trader Rating: (14)	so could it be a fuel problem? cause if i hold the gas pedal down and start it it starts! __________________ *sounds like a trex lives under my hood*

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode