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View Full Version : Rough Idle/Bogging under 4k


TomBec
06-26-2013, 08:38 PM
Hello all.. First post. Ive wanted a 240 project for 9 years now and finally found myself in a position to get one. Picked up a 91 240sx se hicas, 5 spd, very clean for $1500. (ka24de)

Problem

Erratic idle and bogs.. Give it throttle and i get no response until i put the peddle down to about 4k. replaced o2 sensor, plugs are in correct order, no vacuum leaks, ive played with the maf during idle and im 99% sure its not the problem, ive cleaned/brushed out injector plugs...

i am going to swap the KA for a blacktop asap, but until my funds are in order for that i would like to have this running well enough to drive it around a bit and maybe teach my wife to drive a stick before swap.

thanks in advance

TomBec
06-27-2013, 07:44 AM
Bump.... Anyone?

ultimateirving
06-27-2013, 11:10 AM
Sounds like a vacuum leak, torn coupler between maf and tb.. Also check the ecu for codes

TomBec
06-27-2013, 03:10 PM
Sounds like a vacuum leak, torn coupler between maf and tb.. Also check the ecu for codes

havnt checked between maf/tb but heading outside to do that now BUT.. when i went to check for codes i got a little suprise.. its running a Jim Wolf Technology P.O.P. Upgrade Package ECU. No idea whats goin on - wtf - heading out to take another gander now.