New 240sx w/ blacktop SR. Question on issues!

[HIGHFIVEBETA]

I dont mean to be a typical noob and not search around but this forum is pretty huge.

I love the car, i love how it drives. The last owner told me its tuned to 15psi but the boost gauge reads the motor boosting past 20 on WOT. So i def need to get this checked out. Im def trying to stay below 16 until i get it tuned. Car has power fc, 750cc injectors, walbro fp, stock turbo

The one issue that disturbs me is starting the car. Yesturday the car almost did not start. Took me about 3 minutes and a few tries to crank it and to come on. My trip after that, i cranked it and it turned on immediately. This morning it cranked for a few seconds, it started, but it was definately stuttering for about 3-4 seconds until i gave it some gas and it came on just fine. Im suspecting the cylinders are getting flooded w fuel but then again i could be wrong. The last 4-5 times this was an on and off situation. Other than that the car runs strong on the road and while boosting. Can anybody help me out on what the issue might be and how i can fix it?

[CRyan]

eh, my assumption by the information given, is you missed the orange wire to the ignition. Basically its for cold start, and opens all injectors to wide open for starting. I too, don't have this wire hooked up, and it takes it a few seconds to get up to idle. Again, only a shot out there.

[HIGHFIVEBETA]

After lastnight i noticed some new stuff.


This morning u could hear the car backfire occasionally every couple of second on start up. I only checked plug 1 and it looked fine, no oil on cylinders. Under WOT the CEL blinks @ full boost

[CRyan]

Backfiring at start up? Hmmm. Last time I had anything of that relevance it was my timing out. And just out of curiosity, you checked wastegate to make sure it actuates? I assume you are running an adjustable one? How exactly did the plug look? Check strap above plug, if its got discoloration any further back above the electrode, your running too hot, and to close to the tip your running too cold, yada yada. Those spark plugs can be a plus for any kind of tune.