Cold start issue

[blackcoupe]

I have a problem with cold starts in the morning or just after long hours of not starting my car. I have to crank it for like 3-5 seconds before it fires up, but the idle will save itself to 1000rpm then drop back to around 750 after a second or two. After that starting, the car runs comepletely fine. I have some cracks on the fuel pump line, not sure if that matters, along with that the fuel pump gasket was cut and reused. It's a 1989 240 Sohc motor, z32 fuel filter, and exhaust are only mods.

Anyone have any ideas or similar problems?

[s13silvia123]

wrong section put it on the tech section.

[Ninjabread]

I don't see anything abnormal with that. Warm up idle can be anywhere from 1000 to 1400 rpm. I know on cold days, mine will want to stay at around 1400 but after a few "stop and go's", it will settle to 750.

[Wei240]

where do you see cracks in the line?
is it the rubber hose below the fuel filter? if so, replace it, very simple

[blackcoupe]

oh sh** totally didnt know i posted in the motorsport section, mods if ya can move to tech section. thanks

and to wei, the cracked lines are are at end on the nipples of the fuel PUMP.