ka24de problems

SilverGhost · 12-29-2003, 12:39 AM

i just swapped a second ka24de into my 91 240sx and im having some problems with it. it will start and run, just not idle. when i start it it goes up to about 3k rpms, then just dies. any i deas as to what that could be and how to fix it?

Special K · 12-29-2003, 04:26 PM

What year KA was it you swapped? I figure you're using the new KA's ECU?

SilverGhost · 12-30-2003, 10:32 PM

the motor is a 92 ka and i kept my same ecu cause its aftermarket....could that be it?

Chas · 12-31-2003, 01:54 AM

Try the stock ecu, the one that came with the motor. Also check throttle linkage, probably not the probelm, but its happend to me before.

SilverGhost · 12-31-2003, 11:17 AM

i have checked the thottle linkage many times, and its fine. i dont have the stock ecu, so i will have to get one from a junkyard or somehting like that

mranlet · 12-31-2003, 12:22 PM

Sounds like a throttle position sensor to me - it could be trying to give you more mix but is just leaning it out too much and killing it...

-MR

Weapon X · 12-31-2003, 12:40 PM

http://www.240sx.org/faq/index.html

Maybe you can find something in there, it's helped me out before. If not you can always post a question on the 240sx.org message board, but they're flame happy.

12-31-2003, 01:30 PM

Quote:

Originally posted by Weapon X
http://www.240sx.org/faq/index.html

Maybe you can find something in there, it's helped me out before. If not you can always post a question on the 240sx.org message board, but they're flame happy.

Boy, I'm glad this board isn't flame happy

Psyche!

I would try dumping the the ECU a few times if you haven't already. Disconnect the batt for 10-15min. But yeah, check that FAQ, there's a lot of stuff there.

SilverGhost · 12-31-2003, 01:57 PM

k. will do! thanx

VuDuDoc · 12-31-2003, 02:05 PM

wont idle and die
IAC/AAC adjust screw to 650 +/_ 50 manual
TPS set to .5 V
Verify connections and vacuum
AFM VAC leak ..bad afm trips code
DE timing is 20deg BTDC
Make sure plug wires are snug and on the right cylinders...mine could run on 1&3 cyl
do this all with Stock ecu in place then if all is well swap ecu
GL man

ae86shinchu · 01-02-2004, 07:35 PM

also try using your old throttle body if you still have it. simple swap takes 2 minutes and you have peace of mind that your old one worked (since i assume you didnt have idle problem before?). if that isnt it, yeah try the IAC and MAF stuff. ECU should be fine since 91 and 92 ECU should be the same progrom (can anyone correct me on this?) i have a 95 KA from a zenki s14 in my 92 s13 and she plugged in and ran like a bat out of hell at drift showoff and dd5. only thing i swapped was upper intake manifold, and the power steering pumps/brackets. now i gotta get her back on the road with a new ca18det radiator (2 row! woohoo!) since my stock one is plugged up (i hope!)

good luck on your idle problem, let us know what fixed it!

Driftin180sx · 01-02-2004, 07:54 PM

Vacuum Leak

SilverGhost · 01-02-2004, 09:28 PM

Quote:

Originally posted by ae86shinchu
also try using your old throttle body if you still have it. simple swap takes 2 minutes and you have peace of mind that your old one worked (since i assume you didnt have idle problem before?). if that isnt it, yeah try the IAC and MAF stuff. ECU should be fine since 91 and 92 ECU should be the same progrom (can anyone correct me on this?) i have a 95 KA from a zenki s14 in my 92 s13 and she plugged in and ran like a bat out of hell at drift showoff and dd5. only thing i swapped was upper intake manifold, and the power steering pumps/brackets. now i gotta get her back on the road with a new ca18det radiator (2 row! woohoo!) since my stock one is plugged up (i hope!)

good luck on your idle problem, let us know what fixed it!

i am waiting on a new throttle body now, because the one i was using broke (the idle pin assembly cracked and then came off completely), that t.b. was the one from my old engine....when i got the new block, i had to transfer the intake and exhaust manifolds and all the intake hardware and everything like that....

any one know how many/where they are of the vacuum plugs or whatever?

Driftin180sx · 01-02-2004, 10:55 PM

Get Starting fluid get the car to run and spray it around the intake T/B ect and if the idle raises there is a vacumm leak there

VuDuDoc · 01-03-2004, 08:43 AM

an easy way is to hook up a vac tester to find out the overall condition on the motor. it will tell you if you have leaks too. there are alot of vac line on the 24E. i will post an online chilton link for everyone and let you know when it is posted. the cheap methad and good one is the starting fluid for the manifold. The Vac tester will cover the headgasket, fried valves, dead cylinder.

i hope you work it out soon and it isnt electrical related...otherwise i feel for you.

SilverGhost · 01-03-2004, 09:27 AM

ok, where do you get the Vac tester?

i do belive that there is a vacuum that isnt closed becasue when i run coolant through it, it leaks out near the intake manifold, so to look at that, must i remove the intake manifold?

VuDuDoc · 01-03-2004, 10:23 AM

WAL MART,K MART....bout 10-15 bucks

yeah man that thing is shot......betcha coolant in mixing with the AF mix

hit me on AIM dragdriftautox
sounds funny...........might have to trouble shoot online. you got a digi cam?

12-29-2003, 12:39 AM	#1
SilverGhost touge sleepy-eye 180sx Join Date: Dec 2003 Location: CO Posts: 964	ka24de problems i just swapped a second ka24de into my 91 240sx and im having some problems with it. it will start and run, just not idle. when i start it it goes up to about 3k rpms, then just dies. any i deas as to what that could be and how to fix it?

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12-29-2003, 04:26 PM	#2
Special K Registered User Join Date: Dec 2003 Location: Canada Eh! Posts: 106	What year KA was it you swapped? I figure you're using the new KA's ECU?

12-30-2003, 10:32 PM	#3
SilverGhost touge sleepy-eye 180sx Join Date: Dec 2003 Location: CO Posts: 964	the motor is a 92 ka and i kept my same ecu cause its aftermarket....could that be it?

12-31-2003, 01:54 AM	#4
Chas Guest Join Date: Nov 2003 Location: Huntington Beach Posts: 2,566	Try the stock ecu, the one that came with the motor. Also check throttle linkage, probably not the probelm, but its happend to me before.

12-31-2003, 11:17 AM	#5
SilverGhost touge sleepy-eye 180sx Join Date: Dec 2003 Location: CO Posts: 964	i have checked the thottle linkage many times, and its fine. i dont have the stock ecu, so i will have to get one from a junkyard or somehting like that

12-31-2003, 12:22 PM	#6
mranlet Smokes Dynamite Join Date: Dec 2003 Location: Tampa, CT, all over the place! Posts: 1,090	Sounds like a throttle position sensor to me - it could be trying to give you more mix but is just leaning it out too much and killing it... -MR

12-31-2003, 12:40 PM	#7
Weapon X SHINJIRO Join Date: Nov 2003 Location: Twilight Posts: 796	http://www.240sx.org/faq/index.html Maybe you can find something in there, it's helped me out before. If not you can always post a question on the 240sx.org message board, but they're flame happy.

12-31-2003, 01:57 PM	#9
SilverGhost touge sleepy-eye 180sx Join Date: Dec 2003 Location: CO Posts: 964	k. will do! thanx

12-31-2003, 02:05 PM	#10
VuDuDoc Monkey Works DS Join Date: Jun 2003 Location: Washington Posts: 218	wont idle and die IAC/AAC adjust screw to 650 +/_ 50 manual TPS set to .5 V Verify connections and vacuum AFM VAC leak ..bad afm trips code DE timing is 20deg BTDC Make sure plug wires are snug and on the right cylinders...mine could run on 1&3 cyl do this all with Stock ecu in place then if all is well swap ecu GL man

01-02-2004, 07:35 PM	#11
ae86shinchu Newbie Join Date: Dec 2003 Location: Escondido, Ca Posts: 22	also try using your old throttle body if you still have it. simple swap takes 2 minutes and you have peace of mind that your old one worked (since i assume you didnt have idle problem before?). if that isnt it, yeah try the IAC and MAF stuff. ECU should be fine since 91 and 92 ECU should be the same progrom (can anyone correct me on this?) i have a 95 KA from a zenki s14 in my 92 s13 and she plugged in and ran like a bat out of hell at drift showoff and dd5. only thing i swapped was upper intake manifold, and the power steering pumps/brackets. now i gotta get her back on the road with a new ca18det radiator (2 row! woohoo!) since my stock one is plugged up (i hope!) good luck on your idle problem, let us know what fixed it!

01-02-2004, 07:54 PM	#12
Driftin180sx Controlled KAOS Join Date: Jul 2003 Location: Oregon Posts: 303	Vacuum Leak

01-02-2004, 10:55 PM	#14
Driftin180sx Controlled KAOS Join Date: Jul 2003 Location: Oregon Posts: 303	Get Starting fluid get the car to run and spray it around the intake T/B ect and if the idle raises there is a vacumm leak there

01-03-2004, 08:43 AM	#15
VuDuDoc Monkey Works DS Join Date: Jun 2003 Location: Washington Posts: 218	an easy way is to hook up a vac tester to find out the overall condition on the motor. it will tell you if you have leaks too. there are alot of vac line on the 24E. i will post an online chilton link for everyone and let you know when it is posted. the cheap methad and good one is the starting fluid for the manifold. The Vac tester will cover the headgasket, fried valves, dead cylinder. i hope you work it out soon and it isnt electrical related...otherwise i feel for you.

01-03-2004, 09:27 AM	#16
SilverGhost touge sleepy-eye 180sx Join Date: Dec 2003 Location: CO Posts: 964	ok, where do you get the Vac tester? i do belive that there is a vacuum that isnt closed becasue when i run coolant through it, it leaks out near the intake manifold, so to look at that, must i remove the intake manifold?

01-03-2004, 10:23 AM	#17
VuDuDoc Monkey Works DS Join Date: Jun 2003 Location: Washington Posts: 218	WAL MART,K MART....bout 10-15 bucks yeah man that thing is shot......betcha coolant in mixing with the AF mix hit me on AIM dragdriftautox sounds funny...........might have to trouble shoot online. you got a digi cam?