SR20 powered 240Z, Wont start when cold! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SRfairladyZ · 02-27-2005, 10:06 PM

I have a 98 SR20det in my 71 240Z. We put it in with the SR20 harness and a Painless switch/fuse box for the fuel pump and ign. Also have a SAFC amung other things. Problem is, the car will NOT start when its below 38 degrees out. The car will crank and crank untill the batt is dead or the plugs foul, which ever comes first. I'll maybe get a few little start stumbles but nothing more. When its 40+ degrees outside, the car starts within 8 seconds of cranking, when its 60 outside she starts up no problem. The car runs, idles and drives/races perfectly once started. Can you guys list some ideas of why this maybe?

I have a full race inline SX fuel pump, its huge, and you can hear it from 10 feet away. I have it run off a switch. My fuel pressure reads 2bar when cranking. Any ideas will help add to my troubleshooting, Thanks!

a2low240 · 02-27-2005, 10:37 PM

Most likely it is the orange wire coming off the ECU ( Start Signal wire ) Sorry don't have an exact pin location but this wire will prime the motor ( more important when cold ) so that she fires right up. Nice looking project BTW.

Dutchmalmiss · 02-27-2005, 11:01 PM

could it have something to do with the plugs themselves? or the ignition? i also agree that that car looks good two. what kind of rad support is that? looks different

SRfairladyZ · 02-28-2005, 08:10 AM

Thanks guys. i have the ecu pin out pages infront of me now and the start signal wire is pin 34. ign sw on = 0 volts. ign sw start 9-12v. I'll look into that one aswell with the multimeter. damn snow is coming and the garage is full so i wont be able to get to it for a few days

Radiator support us custom, and so is just about everything in the car lol

heres some more..

Vatche · 02-28-2005, 08:30 AM

nice looking car gj

Myssan · 03-01-2005, 01:14 AM

nice ride.

Drunk Bastard · 03-01-2005, 04:14 AM

HOT. wish my 240z had an sr20...

sepulchral · 03-01-2005, 06:11 AM

wish i had a 240z with an sr20

02-27-2005, 10:06 PM	#1
SRfairladyZ Leaky Injector Join Date: Feb 2005 Location: nyc Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	SR20 powered 240Z, Wont start when cold! I have a 98 SR20det in my 71 240Z. We put it in with the SR20 harness and a Painless switch/fuse box for the fuel pump and ign. Also have a SAFC amung other things. Problem is, the car will NOT start when its below 38 degrees out. The car will crank and crank untill the batt is dead or the plugs foul, which ever comes first. I'll maybe get a few little start stumbles but nothing more. When its 40+ degrees outside, the car starts within 8 seconds of cranking, when its 60 outside she starts up no problem. The car runs, idles and drives/races perfectly once started. Can you guys list some ideas of why this maybe? I have a full race inline SX fuel pump, its huge, and you can hear it from 10 feet away. I have it run off a switch. My fuel pressure reads 2bar when cranking. Any ideas will help add to my troubleshooting, Thanks!

02-27-2005, 10:37 PM	#2
a2low240 Leaky Injector Join Date: Aug 2003 Location: Downingtown Pa Age: 45 Posts: 113 Trader Rating: (0) Feedback Score: 0 reviews	Most likely it is the orange wire coming off the ECU ( Start Signal wire ) Sorry don't have an exact pin location but this wire will prime the motor ( more important when cold ) so that she fires right up. Nice looking project BTW. __________________ Signature Exceeds Forum Limits

02-27-2005, 11:01 PM	#3
Dutchmalmiss Post Whore! Join Date: Apr 2003 Location: Socal (323) Age: 39 Posts: 3,501 Trader Rating: (14) Feedback Score: 14 reviews	could it have something to do with the plugs themselves? or the ignition? i also agree that that car looks good two. what kind of rad support is that? looks different __________________ Pignose, biaaatch.

02-28-2005, 08:10 AM	#4
SRfairladyZ Leaky Injector Join Date: Feb 2005 Location: nyc Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	Thanks guys. i have the ecu pin out pages infront of me now and the start signal wire is pin 34. ign sw on = 0 volts. ign sw start 9-12v. I'll look into that one aswell with the multimeter. damn snow is coming and the garage is full so i wont be able to get to it for a few days Radiator support us custom, and so is just about everything in the car lol heres some more..

03-01-2005, 01:14 AM	#6
Myssan Leaky Injector Join Date: Jan 2004 Location: Raleigh, NC Age: 49 Posts: 70 Trader Rating: (0) Feedback Score: 0 reviews	nice ride.

03-01-2005, 04:14 AM	#7
Drunk Bastard Zilvia FREAK! Join Date: Nov 2003 Posts: 1,405 Trader Rating: (2) Feedback Score: 2 reviews	HOT. wish my 240z had an sr20...

03-01-2005, 06:11 AM	#8
sepulchral BANNED Join Date: Mar 2004 Location: Midlothian. VA Posts: 2,050 Trader Rating: (0) Feedback Score: 0 reviews	wish i had a 240z with an sr20