Cold Start-Up Problems, engine flooding out?? what do ya think?
03-26-2006, 10:31 PM
#1
1.5 BAR
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Join Date: Jul 2005
Posts: 1,463
Cold Start-Up Problems, engine flooding out?? what do ya think?
Ok so I seem to have a problem with my 95 240sx. The car just does not want to start. And you can just smell the raw fuel.
Let me give a little background info. It’s a turbo ka24de, upgraded injectors and fuel pump, controlled by SAFC-II. My brother was driving it and blew a charge pipe off and limped it home until I could fix it. After that I tried playing with the Decel feature on the SAFC-II and the motor just flooded itself out, so I undid the decal feature and put the settings back to what they were previously. I pulled out all the spark plugs and cleaned them all up and reinstalled them. The car was really hesitating but started up, and I drove it around for about 10-15 minutes then the car seemed to be fine. Drove it to work the next day and everything was great, no problems starting. Now today I pulled the car out of my driveway without problems, washed it, then about 4 hours later, I went to put it in the house and it kind of half *** started, kind of struggling then died, then after that it wouldn’t start at all. I could smell fuel, so I turned the key without running the fuel pump (in between running the starter and “on”) and finally got it to start, and then the car idled pretty well. So I guess what I am wondering is, could I have a bad injector? Or what is causing the car to pour fuel in at idle or prior to turning the key ??
Let me give a little background info. It’s a turbo ka24de, upgraded injectors and fuel pump, controlled by SAFC-II. My brother was driving it and blew a charge pipe off and limped it home until I could fix it. After that I tried playing with the Decel feature on the SAFC-II and the motor just flooded itself out, so I undid the decal feature and put the settings back to what they were previously. I pulled out all the spark plugs and cleaned them all up and reinstalled them. The car was really hesitating but started up, and I drove it around for about 10-15 minutes then the car seemed to be fine. Drove it to work the next day and everything was great, no problems starting. Now today I pulled the car out of my driveway without problems, washed it, then about 4 hours later, I went to put it in the house and it kind of half *** started, kind of struggling then died, then after that it wouldn’t start at all. I could smell fuel, so I turned the key without running the fuel pump (in between running the starter and “on”) and finally got it to start, and then the car idled pretty well. So I guess what I am wondering is, could I have a bad injector? Or what is causing the car to pour fuel in at idle or prior to turning the key ??
03-26-2006, 10:45 PM
#2
3.0 BAR
Join Date: Dec 2002
Posts: 3,830
Re: Cold Start-Up Problems, engine flooding out?? what do ya think?
On the surface it seems as if the mix n' match method of fuel control is allowing a C-hair too much fuel during start conditions. If it starts first try your golden, but after 1 or 2 failed starts you've got a pretty good amount of fuel in the chamber and some wet plugs.
As a matter of habit you might try ever so slightly cracking the throttle when starting, to ensure you get it first try.
Im sure that being a MAF car, the 'start' injector pulse width is a set # vs ECT and IAT; and any trims you put in via the fuel controller to control the larger injectors is having 0 effect on crank/start fueling
Just a guess.
Bottom line, start it like it was an over carbed SBC, lol.
As a matter of habit you might try ever so slightly cracking the throttle when starting, to ensure you get it first try.
Im sure that being a MAF car, the 'start' injector pulse width is a set # vs ECT and IAT; and any trims you put in via the fuel controller to control the larger injectors is having 0 effect on crank/start fueling
Just a guess.Bottom line, start it like it was an over carbed SBC, lol.
03-26-2006, 10:46 PM
#3
3.0 BAR
Join Date: Apr 2004
Posts: 9,800
Re: Cold Start-Up Problems, engine flooding out?? what do ya think?
Originally Posted by leed
On the surface it seems as if the mix n' match method of fuel control is allowing a C-hair too much fuel during start conditions. If it starts first try your golden, but after 1 or 2 failed starts you've got a pretty good amount of fuel in the chamber and some wet plugs.
As a matter of habit you might try ever so slightly cracking the throttle when starting, to ensure you get it first try.
Im sure that being a MAF car, the 'start' injector pulse width is a set # vs ECT and IAT; and any trims you put in via the fuel controller to control the larger injectors is having 0 effect on crank/start fueling Just a guess.
Bottom line, start it like it was an over carbed SBC, lol.
As a matter of habit you might try ever so slightly cracking the throttle when starting, to ensure you get it first try.
Im sure that being a MAF car, the 'start' injector pulse width is a set # vs ECT and IAT; and any trims you put in via the fuel controller to control the larger injectors is having 0 effect on crank/start fueling
Just a guess.Bottom line, start it like it was an over carbed SBC, lol.
03-27-2006, 12:20 AM
#4
1.5 BAR
Thread Starter
Join Date: Jul 2005
Posts: 1,463
Re: Cold Start-Up Problems, engine flooding out?? what do ya think?
I guess i'm just confused as to why all of a sudden its started doing this, because it has been fine for the past month or so
man i thought those days were over... 
Originally Posted by leed
Bottom line, start it like it was an over carbed SBC, lol.
03-27-2006, 06:05 AM
#5
3.0 BAR
Join Date: Mar 2005
Posts: 3,161
Re: Cold Start-Up Problems, engine flooding out?? what do ya think?
Mine would stall and sputter when starting sometimes. Really random. Start it like the '79 Nova the track hillbillies all love. 
"Give 'er some gas!!! Give 'er some gaaassss!!"
JP
"Give 'er some gas!!! Give 'er some gaaassss!!"JP
03-27-2006, 10:18 AM
#7
1.5 BAR
Thread Starter
Join Date: Jul 2005
Posts: 1,463
Re: Cold Start-Up Problems, engine flooding out?? what do ya think?
Originally Posted by SloS13
my 240 would do that some times. remove fuel pump fuse, turn over for a while, replace fuse, start car.
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