hi all

i started my Vette yesterday, behavior is the following...

outside temp is about 41°F...

i start, the engine coughs a bit, i give a bit throttle, the engine catches and run immediately..once the engine is just a bit warm, no more "start up" throttle is necessary

when its warm outside, the engine also starts immediately..

so i think, its just a small problem, which table in $8D i should look for?

engine is a 396 with 230/236XFI cam, SP EFI , 30#injectors and 10.8 to 1 comp.

this is, what my crank fuel pulse vs coolant temp look like

thank you

 

The IAC position plays a role in crank to start. May need to open it a little more.

RBob.

 

Hi and thank you

my dumb queston now: how can i do this?

my IAC counts are pinned at 160 counts when my engine is idling cold...and, AFAIK more than 160 is not possible...when hot, IAC is about 60 counts idling

thank you

 

Readjust the IAC per this article. If your normal idle speed is higher (due to modifications), set the IAC idle speed to 50-100 rpm less than your normal "full warmed up" idle speed. The idle speed for the IAC is the article is for a "stock engine" and too low for a modified engine.

https://www.thirdgen.org/tpimod2