hesitation/ sputtering problems

Information on the naturally-aspirated KA24E and KA24DE engines.
turbonola
Posts: 186
Joined: Fri Nov 11, 2005 1:28 pm
Car: 91 240sx coupe

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i swapped a running motor from a 93 into my 91 s13 and now i'm having a small problem.

the car will drive fine cold and when it get to operating temp it'll drive ok for awhile. after awhile it'll start sputtering and won't rev. if i turn the car off then turn it right back on it'll run fine for awhile again. i just ran the gas tank to empty and put some injector cleaner in it and filled the tank. it hasn't done it lately but it still doesn't feel right. also the car has an unstable idle. i've attempted to adjust it multiple times. i'm just holding out until my built motor is finished. any help would be greatly appreciated.


turbonola
Posts: 186
Joined: Fri Nov 11, 2005 1:28 pm
Car: 91 240sx coupe

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any help.

WWJD

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look to see that you have all the right sensor that goto the corresponding motor along with the ECU.

take a look at your IAA valve, it could be dirty. you AIV as well

take a look at all your ground wire to your IAA valve, adding another one helps

turbonola
Posts: 186
Joined: Fri Nov 11, 2005 1:28 pm
Car: 91 240sx coupe

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din't know iaa had a ground. i'll clean iaa and iacv and let you know the outcome. might add that extra ground also.

DALAZ_68
Posts: 1574
Joined: Mon Apr 09, 2007 7:01 pm
Car: 90' 240sx CA18det

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WWJD wrote:look to see that you have all the right sensor that goto the corresponding motor along with the ECU.

take a look at your IAA valve, it could be dirty. you AIV as well

take a look at all your ground wire to your IAA valve, adding another one helps
AAI ???

sorry im still new to all this...were is this located and how do i clean??

cuz my sputtering is still happening...not just that bad i think low compression


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