Differences with KA24E and KA24DE wiring harness - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ignored281 · 08-26-2010, 09:30 AM

Hey guys, i have a 90 hatch with the stock KA24E and pieced together a KA24DE engine and after reading all the stickies and FAQ's I found that I need to change the ECU because the harness is different.

Can I use the SOHC harness and ECU? Are the sensor connectors different or something ?

Im just wondering because it seems these engines are so interchangeable.

stinky_180 · 08-26-2010, 03:48 PM

Your better off using a KA24DE ecu. There is only one person I know that has successfully ran an 8bit ecu with a S14 KA24DE.

Differences? ECCS harness connector is different. Pinouts are completely different.

Oh even if you do modify the eccs harness, you will still need to modify the code to reflect that of the engine. IE. you will need to desolder the 27c256 EPROM. Install an eprom socket. Program a 27SF512 with KA24DE tune modified to run on w/KA24E hardware...

Again, your better off finding a DOHC engine harness and ecu.

ignored281 · 08-27-2010, 07:31 AM

I understand I might be better off with a DE ecu and harness but Id like to simply disconnect the electrical connections from the engine. Pull out the ka24e. Drop in the DE and hook those same connections up.

The engines have the same firing order so if the SOHC harness will connect to the ignition, injectors, maf, etc. Why wouldnt it run ????

I plan on buying the Megasquirt kit ao Im not concerned about the differences in the ecu's.

Thanks for your help.

repda916 · 08-27-2010, 01:07 PM

it wont work. you under stand what a ecu is right.

ignored281 · 08-27-2010, 02:58 PM

Quote:

Originally Posted by repda916

it wont work. you under stand what a ecu is right.

why not.... how would the ecu know the difference ???

ignored281 · 08-28-2010, 08:37 AM

Quote:

Originally Posted by repda916

it wont work. you under stand what a ecu is right.

GET OUT! No soup for you.

stinky_180 · 08-27-2010, 03:24 PM

good luck...........

WheelWhore · 08-28-2010, 09:10 AM

^~your a retard.

for one, the engine plugs are different, specifically the injectors and a few other key plugs.

second of all, pretty sure the fuel maps are different. IIRC the SOHC's were alittle higher in compression.

third of all, the air flow meters between a SOHC and DOHC are not the same. Therefor, you running a SOHC ecu on a DOHC car with with a DOHC maf or SOHC maf will not work.

ALL THIS CAN BE FOUND SEARCHING.

Just buy a harness. Ill sell you one for christ sake.

taft boy · 08-28-2010, 09:25 AM

Quote:

Originally Posted by WheelWhore

^~your a retard.

for one, the engine plugs are different, specifically the injectors and a few other key plugs.

second of all, pretty sure the fuel maps are different. IIRC the SOHC's were alittle higher in compression.

third of all, the air flow meters between a SOHC and DOHC are not the same. Therefor, you running a SOHC ecu on a DOHC car with with a DOHC maf or SOHC maf will not work.

ALL THIS CAN BE FOUND SEARCHING.

Just buy a harness. Ill sell you one for christ sake.

he'ssssss right

projectRDM · 08-28-2010, 06:04 PM

Injector, MAF, distributor, coil, and several other plugs are all different. Plus, not all the sensors are located in the same place on both engines.

boneout · 08-29-2013, 12:00 PM

Yeah hes right the is much fewer plugs on the ka24de harness then the sohc my main problem with my swap is that i am going to have to repin the plug from the ecu to the under dash harness. The sohc doesnt have the extra ground the dohc cam does

Chuki_KA24e · 08-29-2013, 02:09 PM

Quote:

Originally Posted by boneout

Yeah hes right the is much fewer plugs on the ka24de harness then the sohc my main problem with my swap is that i am going to have to repin the plug from the ecu to the under dash harness. The sohc doesnt have the extra ground the dohc cam does

Did you even look at the date of the last post in this thread?...
Just curious lol...

08-26-2010, 09:30 AM	#1
ignored281 Join Date: Aug 2010 Location: anywhere, USA Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	Differences with KA24E and KA24DE wiring harness Hey guys, i have a 90 hatch with the stock KA24E and pieced together a KA24DE engine and after reading all the stickies and FAQ's I found that I need to change the ECU because the harness is different. Can I use the SOHC harness and ECU? Are the sensor connectors different or something ? Im just wondering because it seems these engines are so interchangeable.

08-26-2010, 03:48 PM	#2
stinky_180 Nissanaholic! Join Date: May 2004 Location: Pale Blue Dot Age: 36 Posts: 2,064 Trader Rating: (26) Feedback Score: 26 reviews	Your better off using a KA24DE ecu. There is only one person I know that has successfully ran an 8bit ecu with a S14 KA24DE. Differences? ECCS harness connector is different. Pinouts are completely different. Oh even if you do modify the eccs harness, you will still need to modify the code to reflect that of the engine. IE. you will need to desolder the 27c256 EPROM. Install an eprom socket. Program a 27SF512 with KA24DE tune modified to run on w/KA24E hardware... Again, your better off finding a DOHC engine harness and ecu. __________________ SoCal RallyX Coverage and MTB Ride Reports WheelsDirty

08-27-2010, 03:24 PM	#7
stinky_180 Nissanaholic! Join Date: May 2004 Location: Pale Blue Dot Age: 36 Posts: 2,064 Trader Rating: (26) Feedback Score: 26 reviews	good luck........... __________________ SoCal RallyX Coverage and MTB Ride Reports WheelsDirty

08-28-2010, 06:04 PM	#10
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 47 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Injector, MAF, distributor, coil, and several other plugs are all different. Plus, not all the sensors are located in the same place on both engines. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

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08-27-2010, 07:31 AM	#3
ignored281 Join Date: Aug 2010 Location: anywhere, USA Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	I understand I might be better off with a DE ecu and harness but Id like to simply disconnect the electrical connections from the engine. Pull out the ka24e. Drop in the DE and hook those same connections up. The engines have the same firing order so if the SOHC harness will connect to the ignition, injectors, maf, etc. Why wouldnt it run ???? I plan on buying the Megasquirt kit ao Im not concerned about the differences in the ecu's. Thanks for your help.

08-27-2010, 01:07 PM	#4
repda916 Zilvia Addict Join Date: Jun 2008 Location: cali Age: 29 Posts: 999 Trader Rating: (0) Feedback Score: 0 reviews	it wont work. you under stand what a ecu is right.

08-28-2010, 09:10 AM	#8
WheelWhore Zilvia Addict Join Date: Jan 2010 Location: NC Age: 35 Posts: 724 Trader Rating: (4) Feedback Score: 4 reviews	^~your a retard. for one, the engine plugs are different, specifically the injectors and a few other key plugs. second of all, pretty sure the fuel maps are different. IIRC the SOHC's were alittle higher in compression. third of all, the air flow meters between a SOHC and DOHC are not the same. Therefor, you running a SOHC ecu on a DOHC car with with a DOHC maf or SOHC maf will not work. ALL THIS CAN BE FOUND SEARCHING. Just buy a harness. Ill sell you one for christ sake.

08-29-2013, 12:00 PM	#11
boneout Join Date: Aug 2013 Location: cali Age: 29 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	Yeah hes right the is much fewer plugs on the ka24de harness then the sohc my main problem with my swap is that i am going to have to repin the plug from the ecu to the under dash harness. The sohc doesnt have the extra ground the dohc cam does