stumbleing on brand new engine
 

i just recently rebuilt my engine, it has 0 miles on it.. my setup is below

D16Z6, stock CR
eagle rods
Vitara pistons
T3/T4 63/50
RC 550 injectors
blah blah blah... not sure what else to put

i burned a BBKA map to get my car running and a couple others as well, and every one has the same problem

they idle fine, AFR at idle is perfect, as soon as i touch the gas it dies

i dont know what could be causeing it... anyone have any ideas? i thought maybe it was the map but i've tried about 4 others with the same results

Re: stumbleing on brand new engine
 

ok well the AFR at idle is 10.7... not quite what i thought it was, guess i just had to let it sit for a bit... but still when i had the bad chips and it ran i could still at least get it to rev, as soon as i hit the gas now it dies

Re: stumbleing on brand new engine
 

I'm assuming you have it scaled for your 550cc injectors?

Re: stumbleing on brand new engine
 

yup, scaled for the injectors, fuel pressure, etc

i just thought of something though... would haveing no signal from the stock O2 cause a stumble like this?

i took out my stock O2 and put in my wideband.. if need be i can hook up the wideband to the ecu for it but would that work?

if that wouldnt be the cause then any other ideas?

Re: stumbleing on brand new engine
 

If you don't have your O2 in and you don't have it disabled, you'll get a CEL.

You can't just hook your wideband up to your ecu in place of your narrowband unless your WB has a narrowband output.

Re: stumbleing on brand new engine
 

i know, it does have a narrow band output... but would no O2 cause the stumbleing at all or just a cell?