ITR981002

Was wondering if anyone has had the same "issue" as me. My car has 680cc injectors, if it hasn't been run for a while this is what it usually does. I turn the key and Immediatly 1 or 2 cyls fire but the car doesn't start. This happens so fast its seems as though it happens before the engine even has a chance to crank over once. Then I turn the key again, it cranks a few times... sometimes I have to blip the throttle but then it starts up... a little rough for a second or two, but then idles completely normal.

Does that sound like I have to add more or less fuel for my 'startup' or 'crank' enrichment? Or is that something that happens to you guys also. I don't mind it that much, the car always starts... just seems weird when it does that. Thanks!

onefstek

what type of fuel management are you using?

ITR981002

Sorry, should have mentioned that. I'm on Crome, stock Map sensor still.

onefstek

did u tune it for the size of injectors. and is it set up for cold start.

ITR981002

Yes, the injectors have been resized in crome... I've added a bit of fuel down low to compensate for the larger injector taking a larger base pulse to open. Once the car is warm it idles at 14.5-15.0 on my wideband. When its cold it idles slightly richer 13.0-13.5. I've not touched the 'startup fuel multiplier' in crome's fuel tools.

onefstek

i don't know about crome that much but I did work with Uber data a little bit.

does it have a way to change the fuel vs air temp and fuel vs water temp.

u might want to look into that and see if you can adjust it to get a better air/fuel. that might help with start up.

im using Apexi Power Fc and it also has a setting for ms (mili seconds) that ajusts the pulsation of the injectors.

turtle-eg

Lean it out a little, it's too rich.

ITR981002

Once warm, it idles around 14.7-15.0 That's not rich at all. Maybe I need to take some fuel away from the Crank enrich however... i'll play with it.