Stock ka24de constantly stuttering around 3k

[blue rexsti]

My car is always stuttering around 3000rpm, most of the time its in every gear. Sometimes it won't occur, but like I said, the majority of time it does. Its usually a quick 1-2 second movement that shakes me back and forth! I changed the spark plugs. I'm thinking next maybe a compression test or injectors? Any thoughts would be greatly appreciated. Thanks

[markapple0507]

fuel pump maybe going out??? it happened to me so its a possibility. this has happened to other people check out their threads. that's where i found out about my pump

[blue rexsti]

I was searching "stuttering," "ka problems," etc and couldn't find anyone with the same problem. I was reading about a fuel injector fixing a stutter problem someone had around 5k rpm... but no one with mine. THanks for the input. I'm going to keep looking into it

[s14driftNA]

I have the same exact problem, someone help this dude!

[blue rexsti]

haha, yeah its pretty annoing huh? I put in new spark plugs and there was no stuttering for 2 days - then drift nirvana and back to stuttering again. Unfortunately, i go to school 2 hours away from my home so i'm not going to be able to do any work diagnosing the problem until i go back home over thanksgiving. Until then i figure why not get a bunch of reasonable suggestions that would possibly be relevant problems and their solutions and go from there.

[blue rexsti]

Also, if anyone else has this problem, please post and we can figure this out together!

[let5l1de]

Easy diagnostics for initial problem solving.

Your coil may be on the way out. Also check all the ground locations for good contact.

1000th post!

~mario

[blue rexsti]

Congrats on your 1000th post! What should I look for? in the coil pack?

[let5l1de]

Congrats on your 1000th post! What should I look for? in the coil pack?

thx

s13 is single external coil and s14 are single internal coil (OBDII). No packs on KA engines unless ignition was modified.

You are looking for a solid blueish color spark with a white spark being okay. A yellow spark typically means the coils is not in optimum condition.

~m

[wbarrett48473]

Just check the codes on your ECU.

[naw_speed]

i'm workin on the same problem. except mine hasn't done it in awhile. it seem to like the heat. i droped in a new set of NGK plugs. swaped MAF with my buddy's SR....i allready had a new walbro installed when i did the swap and hard wired it....i havn't checked the color of the spark but, i have swap my coils around to see if there was a change...none! if i come up with something i'll be sure to hit this thread with it..

[blue rexsti]

Thanks a lot man. Yeah I just finished checking the ecu for codes. All three times at first it would shoot 34 but right after that it would keep shooting 55 and never go back to 34....55 means no faults...dang. My coils look good and I just replaced the spark plugs with ngk a month ago. I'm thinking it it is probably fuel related. I cleaned out my maf sensor this weekend and it was hardly stuttering and I thought the problem went away. Now it is slowly getting gettting back to stuttering under throttle. As well, I will try to keep this thread updated as I work to find the problem

[tnagger]

any luck with this? I've had a similar problem from almost 2 years now :(

[keiglo]

i have the exact same problem in my ka24e. mine happens around 2.5k - 3k as well. little stutter, then comes back. for me it happens when the engine is warmed up. same with you guys? anyone figure out what it might be?

[240sxScores]

Test your fuel pressure. If you have the FSM it will tell you the correct pressures. Or you can get a new fuel pump for what 85-90$

I had a similar problem with my stock ka a while back. I upgraded to a 255lp walbro and it felt significantly better no stutter no feel of lack of power. Have been running the 255 with stock FPR for at least 2 years now.

[ericcastro]

hey guys.
Also be sure to really check out all those tiny little vacuum hoses.
Seems stupid, but I had a similar issue, and the crack in the vacuum line would only really fuck up under a little presure, so it was hard to find at idle.

[afiser]

Thanks a lot man. Yeah I just finished checking the ecu for codes. All three times at first it would shoot 34 but right after that it would keep shooting 55 and never go back to 34....55 means no faults...dang. My coils look good and I just replaced the spark plugs with ngk a month ago. I'm thinking it it is probably fuel related. I cleaned out my maf sensor this weekend and it was hardly stuttering and I thought the problem went away. Now it is slowly getting gettting back to stuttering under throttle. As well, I will try to keep this thread updated as I work to find the problem


you got a 55 because to cleared your ecu. drive it around for a bit and your code should show up again.

34 is injector leak problem on s13/knock sensor on s14.

[wiggafly808]

I had a stutter every once in a while, turned out to be loose maf wires.

Check your maf wiring/buy a new maf

[nismo racer]

hey guys.
Also be sure to really check out all those tiny little vacuum hoses.
Seems stupid, but I had a similar issue, and the crack in the vacuum line would only really fuck up under a little presure, so it was hard to find at idle.

yep, this.

check egr also, i removed mine since it was making my car run like crap.

[lazysk8er2]

mine does this only from 60-65 mph or around 2600 rpm. when cruising on the highway at 60 its starts to bog out or stutter untill i speed up or slow down.

[shinobis13hb]

check your ecu for a MAF code im pretty sure its your maf. i had 2 mafs go bad on me in like 4 months. if you dont kno how to check your ecu for codes let me know ill send you all the informaion and the codes.

[ranger240]

it sounds like a timing chain/ tensioner/ guide issue to me, i had the exact same problem at 3k rpm

[twistedmanakin]

I'm having the same problem with mine. I've checked plugs wires distributor I do have an exhaust leak but nothing major could it be the Tps or maybe fuel pump

[240MAC_2U]

could it be your o2 sensor...?

[dt-p88]

I had this problem last week it was annoying, i changed plugs and wires, cap and rotor, checked for vac leaks and tried a different fuel pump and none of those fixed my issue. I noticed a ground that wasn't bolted it on, it was just hanging there, i tightened that and problem was fixed.

That was the only thing that i checked/changed after nothing else fixed the problem, the ground is the one on the exhaust side close to valve cover towards back of head. Hope this helps.

[Jay420sx]

I had the same problem, threw in a Walbro and everything was all better.

[J90lude]

Check your iacv my good man.