idle sputter and stall problem after head swap

Information on the naturally-aspirated KA24E and KA24DE engines.
Bridgeport240sx
Posts: 6
Joined: Thu May 24, 2007 6:35 pm
Car: 91 240sx LE H/B

Post

when i bought my 240 it had a coolent smoking problem so i removed the head to inspect the hg it was good so i inspected the block it was in good condition so i knew it had to be the head.i swaped it with a good one i had from another 240 i had. when i put every thing together and started the car ran fine for 4 seconds then it started to sputter, the idle droped and slowly bounced from 70 150 and buzzing noises came from under the dash then stalled it would do that every time i start it. when its warmed it will last longer and just sputer for a minute before stalling. the smoking problem was eliminated now i have an even biger one. the car ran fine before. what is causeing this sputtering!!!I cant see it being the timing because when its warm and i unplug the tps sensor it stops suttering but still with the other symptoms. elecrical buzzing?sputtering?stalling? i just found a blown engine control fuse and replaced it now the car does not stall nor have a weird idle,but it still sputters( i hear poping noises from the exuast)its not noticable when driving.the car drives fine!no hesitations or noticable loss of power. a blown engine control fuse might be a hint to the problem.. is there anybody that can help!!! please?


WWJD

Post

when you say it's not noticable when you drive do you mean it's gone. or there just cant' hear the sputer? if the sputter is gone then the obvios first thing to check would be a vac. leak somewhere

Bridgeport240sx
Posts: 6
Joined: Thu May 24, 2007 6:35 pm
Car: 91 240sx LE H/B

Post

ima try to describe the symton more clear when it sputters its just noise.the shakeing hapenes on its own.the engine doesnt do any of this so yea its gone at load .it does act like a vacum leak i checked all the lines but i could not get to the lines behind the head, i checked them before i installed the head so i know there good. i think i mite of mixed them up some how. i just cant get to them with the head on!!! but i can see that there conected. I put the stock air filter box to see if the engine would idle better and it does, now somtimes the motor idles perfectly fine with a shake every now and then.when its not it sputters and shakes.it shakes not constantly but around every two seconds theres a shake.


Return to “KA24E / KA24DE Forum”