as the topic says, its cutting out between 1500 and 2000, its a jdm b18c, p28 ecu. i thought it was the ecu for awhile, but i set all values in that range back to the stock p30 map, spark and fuel. and nothing changed. so what else could it be. please help

 

Check spark plugs,as well as the dizzy and wires

 

ok, thats fine, but what would make that occure strictly in that rpm range? i don't see how, and therefore don't see how it would fix it. not hatin, just wondering if u know something i don't, but what the hell, i'll try it, i'm desperate

 

bump. still need help

 

well if you are dumping too much fuel at lower rpms and not having enough spark to burn it that would make it cut at lower rpms..

 

i didn't touch the fuel map that low, but just to be safe i changed all the values back to the stock p30 map. didn't do jack

 

stock p30 map is too lean for b18c

 

i reaize that, but it really dosn't answer my question, i'm just trying to diagnose a problem here

 

borrow a chip with a stock p73 or p72 program on it and report back

 

at this point i'm pretty sure its not the ecu. i've tried ******* with it, tried going back to the base map i had, and like i said i even tried the p30 values at low rpm. i could just burn a p72 map on it, but i doubt it'd help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by littlegreenb18 &raquo;</TD></TR><TR><TD CLASS="quote">at this point i'm pretty sure its not the ecu. i've tried ******* with it, tried going back to the base map i had, and like i said i even tried the p30 values at low rpm. i could just burn a p72 map on it, but i doubt it'd help. </TD></TR></TABLE>

I've seen ecu chips do weird things like this before.