problem, bogging

Information on the naturally-aspirated KA24E and KA24DE engines.
nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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ok heres the problem, when the car isnt warmed up yet, it runs perfect, everythign is great, but once it gets to the normal operating temp. it bogs out. maybe an air or fuel problem? because i know the spark is good i checked that out.


DjPantsSpecR
Posts: 1711
Joined: Fri Jan 14, 2005 12:49 pm
Car: 93 Nissan MS13
92 Nissan RMS13

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hey, you're from minnesota so i'm gonna try and help you.

now it would be nice to have some more information, like if you've done anything to the car recently, but its entirely possible maybe you have a bad thermal transmitter.

that is the big red sensor on the water outlet of the intake manifold. Its real easy to remove and replace, but this might not be your problem.

now if you need help with all that, you can call me up at 612 242 0666, i'm Chase

however, before you call me or even buy anything search around, its that big read button in the upper right corner, search bogging adn you'll probably find a gang of ****, including threads where people have eventually fixed it

i just wanna help another KA get back on the road, and it sucks your first post here had to be about that.

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VinceSez
Posts: 1377
Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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i have the same problem and i've spent hundreds on my car just to diagnose the problem with no luck

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Ni2s4s0aSnX
Posts: 667
Joined: Tue Apr 19, 2005 8:39 am
Car: Nissan 240sx 2.4L 12Valve

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It could be a number of different things, I can't really diagnose it from a computer screen but I'll try to give you a list of things that you could check. This advice won't be very specific but I try to help. It most likely is an air or fuel problem so check the fuel injectors first, I'll asume you know where they are. Check your MAF sensor for old torn and unprotectewd wires, your sensor wires are porbably pretty old. Check all of the intake sensors, and just check for general vacume leaks around the engine.

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benemorius
Posts: 1937
Joined: Tue Jun 08, 2004 5:39 pm
Car: s13, s13, eg, e36

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Is it only a problem at idle or will it even bog when you give it gas?

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VinceSez
Posts: 1377
Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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i have the same exact problem as him... the car seems like it only does it when the car is at normal temperature. once it's at normal temperature it bog down and doesn't seems to run faster than 30-35 mph. even at idle after the problem occurs it still bogs even when you rev it

KADreams
Posts: 143
Joined: Mon Mar 28, 2005 3:14 pm
Car: 1991 Nissan 240sx Fastback SE

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If the coolant temperature sensor is bad, it will cause the ECU to run in open loop. This will make the motor run pig rich and bog like crazy.

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VinceSez
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Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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hey nsnrcn if you get the problem fixed could you post up how you fixed the problem????

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deviousKA
Posts: 1355
Joined: Tue Aug 12, 2003 5:04 pm
Car: 90 240sx NA /72 Datsun 510 NA /86 corolla GTS NA
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Clean the connection to the coolant temperature sensor and/or replace sensor. This sensor is red and on the upper water neck on the manifold on both ka24e and de. These connectors were upgraded on 95 and later cars.

95% chance this is your problem, common on our nissans with the junky non-sealed plastic electric connections.

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VinceSez
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Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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ill try and look into it tomorrow

DjPantsSpecR
Posts: 1711
Joined: Fri Jan 14, 2005 12:49 pm
Car: 93 Nissan MS13
92 Nissan RMS13

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ha, like i said instantly... nine posts ago

anyways, im not just tryin to gloat, i'm sayin this guy doesnt own the car yet, its an E, but he is planning on buying it.

i should almost try to unplug my sensor and then run it to see just how crappy it runs, that would be an interesting experiment...

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deviousKA
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DjPantsSpecR wrote:ha, like i said instantly... nine posts ago

anyways, im not just tryin to gloat, i'm sayin this guy doesnt own the car yet, its an E, but he is planning on buying it.

i should almost try to unplug my sensor and then run it to see just how crappy it runs, that would be an interesting experiment...
I was just backing you up man

Really, to be honest, of all the work I have done on various nissans at the shop throughout the years, I have never seen those nissan thermistors fail. 9 times out of 10 it will just be the connection, they are prone to corrosion. Pop it off, if you see any green or whitish corrosion, wash it with some acid and a tooth brush. Rinse it out good with some baking soda + water and your probably good to go.

*note, the acid may be a bit hardcore for most, some spray electronic cleaner and a little brush will probably do the trick. If that doesnt work, pop it off again and bend the female pins in so they contact a bit better before you go buy a new or used sensor.

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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ok, now i have the car, and it is sitting at my house...i am positive it is the coolant temp sensor...the kid i bought it from replaced everything but that...so i am pretty sure...so i am going to go get a new one for 15 dollars...


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VinceSez
Posts: 1377
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Car: 1992 Nissan 240sx

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hey nsnrcn did it help any? i cleaned my sensor yesterday and it seems like it's working so far

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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it seems that the plug is bad, not the sensor....bad conection......i am getting a new harness, we will see if it is for sure....cause the water temp sensor was bad, but the harness keeps comeing sose...

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VinceSez
Posts: 1377
Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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harness for the coolant temperature sensor?

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
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yes, the harness keeps comeing loose, caue the kid i got it from broke it....i need to go get a new one, but the closes one the i have found is about 100 miles away...and is is saturday, and i have a hang over...lol

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VinceSez
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Car: 1992 Nissan 240sx

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lol good one

nsnrcn
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Joined: Tue Oct 18, 2005 1:45 pm
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this kid also clipped the wires for the light motors...there are so many little ghettofied issues with this car...cause the last 2 people didn't know what the hell they were doing...and now i have to fix all the stupid **** they did...

DjPantsSpecR
Posts: 1711
Joined: Fri Jan 14, 2005 12:49 pm
Car: 93 Nissan MS13
92 Nissan RMS13

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Hey man you could drive up to Hanz in elk river and i know they have 7 SOHC 240s

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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yeah i am going to... ijust don't like dealing with him, he is a d!ck....and over charges...and for engine parts i am going to jerry's in big lake to get them off of other nissans with the same engine....hey, i sent you an email and you never got back to me...my car came with a short shifter and some other 5 speed parts, if you want to buy them for cheap...or if you have some factory parts to trade...do you have a factory radio?????well i will talk to u later...IM me when you are on, if i am on..

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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what kinda fuel pump is in the 89? i fixed the issue with it heating up, but if it gets to around 1/8th tank it runs like straight ***...i just keep atleast 1/2 tank all the time and it is fine, but i want it fixed anyways...

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VinceSez
Posts: 1377
Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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did you solve the bogging problem? i took my 240 to a local 240 shop and they fixed the problem for me. It was actually the distributor that was causing the problem. The recent mechanic who fixed my car didn't "set" it right.

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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yeah i did. it had a short in the wire from the sensor, and the plug was cracked...but now like i said it does something similar if i let it go below 1/8th tank....

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VinceSez
Posts: 1377
Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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what parts did you buy exactly? i just got my car back and it still does it.... >=(

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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the coolant temp sensor, and resoldered the wires about 3 inches back from the connector...I still need to get a new connector...i am going to the junk yard later this week to get that...but it runs fine most of the time...i think the alt is going though, cause at night, sometimes the lights will dimm abit and it will stutter when i give it gas...and the bat light gets brighter...but i am going to bust out the old multimeter tomarrow to find out...

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VinceSez
Posts: 1377
Joined: Tue Apr 05, 2005 7:28 am
Car: 1992 Nissan 240sx

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kk thx, i'll guess ill just buy a new coolant temp sensor then

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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why didn't you do that in the first place? that was the first thing everyone said to me...

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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now i found a fuel leak, right before the fuel filter...and the filter is brand new, so the guy didn't know how to put it on? maybe?...i don't know, it should run even better once that is fixed...then hopefully i can start focusing on suspension, and makeing it look halfway decent...

nsnrcn
Posts: 19
Joined: Tue Oct 18, 2005 1:45 pm
Car: 92 240sx coupe
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I swear, the more i fix this car the more i realize this guy was a F***ing idiot...i am going to take a close up pic of the paint so i can show you what i am talking about


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