shakly idle, low power ka24de
 

ok guys so im stumped on my s13. every since i got it ive had an idle issue right now is the best i have ever got it. right now when you left of the gas it hang around 1200rpm and may climb upto 1400rpm then a a few seconds later it go down to the normal 750. ive been hunting a vac leak for ever and timing is on spot. now i dont think its a vac leak after i have latly be testing it by pressuizng the manifold and liseaning for leaks. today i evening tried cleaning the maf which didnt really help. one thin that confuses me is that if i on plug the maf the idle issue goes away. specs are as is: rebuilt KA24de (2600miles, 248/232 cams, p2r thermal intake gasket, egr/pair/emissions delete, no powersteering, obx header, and no name clod air intake. i have been looking at also with nissan datascan and im just out of ideas. would attach a NDS datalog but i cant find the file outside of NDS. i have no clue where the low power thing had come from but it kinda random and seems to cut power around 3-5k rpm almost like its pulling a shit ton of timing.

Have you tried cleaning out your idle air valves? You may also try a known good MAF. In my experience cleaning a MAF rarely helps...

Idle air valve was cleaned during rebuiled. When i lookd at the idle at via consult its idleing at like 12 degrees of timing while idel air control vavle is shut. And tonight i looked at it again with the light and blower on with with each item i turned on it pulled less timing from idle with tells me its getting to much air somehow. By the way the idle air screw is almost all the way in.

i found maf a picknpull today dirty outside but hella clean inside run a little better i guess, it reads slight higer then my old maf did. so im back to step one trying to find a vac leak leak any help guys?

Missfire or vacuum leak.

figured it out already AUTOtragic ECU -.-. its shakey casuit pull timing to compansate for the lack of idle resistance (torque convertor), also runing 232/248 cams, poly mounts doesnt help...

Nice. Glad you got it figured out.