First start = no start?

[Chuck_3]

I have a weird problem with my 99 gsx: when it's cold, usually first thing in the morning I go tonstsrt my car and it seems pretty slow cranking and it never starts the first time it will sputter and die right away. When I turn the key the second time to start it it starts up just fine and idles smoothly. It's just that first attempt at starting when it fails. Any ideas? Thanks in advance

mods: bc 272's, walbro, aeromotive afpr, eBay intake, stock T-25, Headstuds, mls head gasket. I'm in the middle of changing my set up, kind of at a stand still with it at the moment.

I forgot to ad this only happens when it's parked outside and cold. If it's parked in the garage it will start up first time.

 

[TotalEclipse21]

Lets see if I can get this right. Frozen water inside your intake, the first cranking heats it up and get pumped into the engine. And by the second cranking its all mostly gone. Do 4g63's have MAF or MAP?

 

[Chuck_3]

It's not that cold here yet. It still in the upper 30's lower 40's in the mornings.

MAF

 

[EagleTalonTim]

try replacing your coolant temp sensor with the 2 wires coming from it. That tells your ECU what temp the engine is at. A bad sensor could cause your morning start problems. I have this exact same problem about 7 years ago with my NT Talon and come to find out, it was my coolant temp sensor wires. One was barely hanging on and after I fixed it, the car cranked right up and never had a problem again.