Need tech help with my newly swapped sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

regnaleb · 03-11-2015, 03:19 PM

Okay guys i desperately need your expertise to help me get this thing running. Here's what i know... its a s13 240sx with a s13 sr20det TYPE X swap. I swapped in the motor and hooked up everything leaving the battery hookup for last. I accidentally hooked up the battery wrong (opposite terminals) and immediately blew up my alt fuse... so i disconnected it quickly ( i did not try and crank the engine while hooked up wrongly). So long story short, I replaced the fuse, the ignitor chip, and the ecu just in case i fried them.

PROBLEM: Engine cranks, gets fuel, gets spark and no start using the 62 ECU

Okay new objectives.

1. How can i find out if my harness is a type x harness. I know i have a type x motor(well at least that is what ive been told by a pretty reputable guy).

2. Any instructions on how to repin my 62 ECU to work for a "type x harness" Or is it me rewiring my "blue plug" to be compatible with a 62 ECU. Which way is it?

3. I plugged in my E5 ecu today and i got no spark again so i thought it just might be stuck in diagnostic mode because that mode screw on the ecu is broken. All at the same time i checked for voltage on my CAS and it all read -0.5v... so yeah i dont know what the means lol.

So basically I have no working E5 ecu. I dont know if i have a type X harness or not. When i do plug in the 62 ECU i get spark, fuel and it cranks but no fire.

EDIT: everything that has changed is highlighted in RED

TheRealSy90 · 03-11-2015, 03:39 PM

Honestly given the vauge wire descriptions, pictures would totally help lol.

regnaleb · 03-11-2015, 04:22 PM

I really dont think "question 2" is a big problem. I was just curious. It should work because its a new body harness and new engine harness. Does it matter if the body harness is from an sohc car or dohc car? or if the ka harness that was made to work for sr was either sohc or dohc?

TheRealSy90 · 03-11-2015, 04:51 PM

A ka engine harness doesn't work on sr20's.

The chassis harness can be modified to work with the sr20 engine harness regardless if it is for a sohc or dohc chassis.

regnaleb · 03-11-2015, 05:46 PM

I understand. But you can use the ka harness and modify it to work with the sr. Im asking if it matters if the ka harness that you modify is dohc or sohc. i never knew you had to modify the chassis harness to work with an sr? im confused now

ultimateirving · 03-11-2015, 05:46 PM

You can test the cas by spinning it with the koeo, (key on engine off,) spin the cas and see if any fuel squirts from the Injectors, the spark plugs will also spark if you have them Hooked up so don't light yourself on fire

regnaleb · 03-11-2015, 05:52 PM

Okay so i have to remove just one injector or all 4? Id have to correct the timing again before i place the cas in right? or just do a full 360 turn and put it back in. Also i know that the injectors are firing so would it be possible the cas still be a problem? My main problem is that im not getting spark. I know i am getting fuel because my spark plugs smell like fuel

silverarrow27 · 03-11-2015, 07:31 PM

No, an sr swap does not involve any chassis harness modifications. But as for your question #2, no it does not matter as long as you have the brown and gray plugs wired correctly.

As for #3, not sure but I'd have to assume it does not as I've swapped that around before on my old cars.

Have you confirmed the red LED light on the ecu lights up? Otherwise it could be a bad wiring job.

cotbu · 03-11-2015, 08:23 PM

For the most part it sounds like timing isnt correct.
Set the engine to tdc, install cas try starting the engine.

If you are sure you have a spark problem, pull fuel pump fuse, pull out a coil pack, insert a spark plug, ground the plug and with koeo, spin the cas. If there is no spark you have to check the wiring. If they do spark, you were probably out of time.

From a Highly Tuned Note 4.5!!!

Fuego · 03-11-2015, 11:01 PM

Did you make sure the new igniter chip worked before putting it in?

regnaleb · 03-11-2015, 11:54 PM

Yes, I am confident the chip works. i've tested it on an already running sr. Thank you guys for the input. Working on it tomorrow and seeing if anything comes up

bataangpinoy · 03-12-2015, 08:45 AM

pull CAS
make sure you are at top dead center
re-install cas after line up the dots

i put my CAS 180* out and i though i was missing spark.

TheRealSy90 · 03-12-2015, 09:14 AM

What I meant was that the plug from the engine harness to the chassis harness has to be modified.

Also, i've never heard of modifying a KA engine harness to work on an SR.

regnaleb · 03-13-2015, 01:13 PM

So today i span the CAS while out of the engine (correctly) and there was still no spark. Does this mean the CAS is fried? Remember i accidentally hooked up the battery wrong momentarily and blew the alt fuse. Could it be possible i fried the wiring? i pulled the entire harness out and checked it closely and everything seems to be fine. I am confident the wiring is correct as i had a reputable guy do it.

lucas240sx · 03-20-2015, 06:00 PM

Do you have all the grounds for the engine?
One off the intake next to throttle body to chassis, and behind head to chassis, and I think one more

Then you have the coil pack ground wire that goes behind the head

ultimateirving · 03-21-2015, 08:54 AM

Quote:

Originally Posted by regnaleb

So today i span the CAS while out of the engine (correctly) and there was still no spark. Does this mean the CAS is fried? Remember i accidentally hooked up the battery wrong momentarily and blew the alt fuse. Could it be possible i fried the wiring? i pulled the entire harness out and checked it closely and everything seems to be fine. I am confident the wiring is correct as i had a reputable guy do it.

It is possible try connecting the injector and give it another spin. See if an injector will spray some fuel. Then if that still doesn't work I would suspect the cas.

regnaleb · 04-01-2015, 03:01 PM

Alright so i rewired the grey plug that plugs the engine harness to the body harness behind the battery. None of the wires matched the first time which is why i think the spark plugs werent sparking. So all of that is done now but still no start. Ive noticed that the headlights dim in and out while cranking but ive checked the grounds and all are doing their job. I also forgot to mention the engine is a type x sr20det blacktop. Any suggestions would be greatly appreciated

regnaleb · 04-01-2015, 03:03 PM

BUMP new stuff added

TheRealSy90 · 04-01-2015, 03:28 PM

62 ecu is not the correct ecu for a Kouki 180sx engine.

cotbu · 04-01-2015, 03:30 PM

Is the engine/ecu harness for a type x?

From a Highly Tuned Note 4.5!!!

cotbu · 04-01-2015, 03:34 PM

Quote:

Originally Posted by cotbu

Is the engine/ecu harness for a type x?

From a Highly Tuned Note 4.5!!!

You have to re-pin some pins if it is.

From a Highly Tuned Note 4.5!!!

regnaleb · 04-01-2015, 04:30 PM

well i have an e5 ecu but the self diagnostic screw doesnt stop when i turn it... is there a way to bypass this. Would the wrong ecu make my lights dim like that?

I also never seen my check engine light turn on

cotbu · 04-01-2015, 05:45 PM

Quote:

Originally Posted by regnaleb

well i have an e5 ecu but the self diagnostic screw doesnt stop when i turn it... is there a way to bypass this. Would the wrong ecu make my lights dim like that?

I also never seen my check engine light turn on

You could try soldering in a new used one.
The wrong ecu, shouldn't make your lights dim, but I tired starter could.
Try jumping the car, and or freshly charged battery?

You have to wire up the check engine light for it to work on the dash. The pin location should be in that pinout.

From a Highly Tuned Note 4.5!!!

regnaleb · 04-01-2015, 06:14 PM

should i try soldering one from my 62?

Shit im not good with pins and stuff... ill look up soldering a used thingy

any good instructions on how to approach repinning something?

regnaleb · 04-01-2015, 06:14 PM

yeah i always jump the car because the batteries completely dead.

Whats The difference in wiring for the type x engines in relation to this link http://www.frsport.com/SR20DET-Swap-...SR20_t_26.html in figure 5a

or is there no difference at all?

cotbu · 04-01-2015, 06:45 PM

There's no difference there, that I'm aware of. The only thing I do extra to a type x, is the repinning.

From a Highly Tuned Note 4.5!!!

regnaleb · 04-01-2015, 07:22 PM

hmmm, alright. Well even with the E5 its still not starting... I really dont know what else to do at this point.

cotbu · 04-01-2015, 08:12 PM

Start over, the wiring, timing the beginning. If you missed the block and coil pack ground etc. It could be something simple. Triple double!

From a Highly Tuned Note 4.5!!!

regnaleb · 04-01-2015, 09:05 PM

Alright man I'll try checking over everything again

I'll let you know what happens

regnaleb · 04-02-2015, 12:29 PM

Okay new objectives.

1. How can i find out if my harness is a type x harness. I know i have a type x motor (well at least that is what ive been told by a pretty reputable guy).

2. Any instructions on how to repin my 62 ECU to work for a "type x harness" Or is it me rewiring my "blue plug" to be compatible with a 62 ECU. Which way is it?

3. I plugged in my E5 ecu today and i got no spark again so i thought it just might be stuck in diagnostic mode because that mode screw on the ecu is broken. All at the same time i checked for voltage on my CAS and it all read -0.5v... so yeah i dont know what the means lol.

So basically I have no working E5 ecu. I dont know if i have a type X harness or not. When i do plug in the 62 ECU i get spark, fuel and it cranks but no fire.

Any tips? Any help? Please lol

03-11-2015, 03:19 PM	#1
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	Need tech help with my newly swapped sr20det Okay guys i desperately need your expertise to help me get this thing running. Here's what i know... its a s13 240sx with a s13 sr20det TYPE X swap. I swapped in the motor and hooked up everything leaving the battery hookup for last. I accidentally hooked up the battery wrong (opposite terminals) and immediately blew up my alt fuse... so i disconnected it quickly ( i did not try and crank the engine while hooked up wrongly). So long story short, I replaced the fuse, the ignitor chip, and the ecu just in case i fried them. PROBLEM: Engine cranks, gets fuel, gets spark and no start using the 62 ECU Okay new objectives. 1. How can i find out if my harness is a type x harness. I know i have a type x motor(well at least that is what ive been told by a pretty reputable guy). 2. Any instructions on how to repin my 62 ECU to work for a "type x harness" Or is it me rewiring my "blue plug" to be compatible with a 62 ECU. Which way is it? 3. I plugged in my E5 ecu today and i got no spark again so i thought it just might be stuck in diagnostic mode because that mode screw on the ecu is broken. All at the same time i checked for voltage on my CAS and it all read -0.5v... so yeah i dont know what the means lol. So basically I have no working E5 ecu. I dont know if i have a type X harness or not. When i do plug in the 62 ECU i get spark, fuel and it cranks but no fire. EDIT: everything that has changed is highlighted in RED Last edited by regnaleb; 04-02-2015 at 12:28 PM..

03-11-2015, 05:46 PM	#6
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 36 Posts: 1,521 Trader Rating: (1) Feedback Score: 1 reviews	You can test the cas by spinning it with the koeo, (key on engine off,) spin the cas and see if any fuel squirts from the Injectors, the spark plugs will also spark if you have them Hooked up so don't light yourself on fire __________________ Z32 with lq4 swap Desert Street Scene \|\| Dssevents.com

03-11-2015, 07:31 PM	#8
silverarrow27 Zilvia FREAK! Join Date: Oct 2005 Location: Banning, CA Posts: 1,428 Trader Rating: (11) Feedback Score: 11 reviews	No, an sr swap does not involve any chassis harness modifications. But as for your question #2, no it does not matter as long as you have the brown and gray plugs wired correctly. As for #3, not sure but I'd have to assume it does not as I've swapped that around before on my old cars. Have you confirmed the red LED light on the ecu lights up? Otherwise it could be a bad wiring job. __________________ 1989 240sx XE\|2002 Frontier SC CC LB 4wd\|2011 Pathfinder LE V8 4wd

03-11-2015, 08:23 PM	#9
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 49 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	For the most part it sounds like timing isnt correct. Set the engine to tdc, install cas try starting the engine. If you are sure you have a spark problem, pull fuel pump fuse, pull out a coil pack, insert a spark plug, ground the plug and with koeo, spin the cas. If there is no spark you have to check the wiring. If they do spark, you were probably out of time. From a Highly Tuned Note 4.5!!! __________________ LoverTechnologies "Half Broken Things!"

03-11-2015, 11:01 PM	#10
Fuego Zilvia Addict Join Date: Nov 2011 Location: Las Vegas Age: 34 Posts: 629 Trader Rating: (0) Feedback Score: 0 reviews	Did you make sure the new igniter chip worked before putting it in? __________________

03-11-2015, 04:22 PM	#3
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	I really dont think "question 2" is a big problem. I was just curious. It should work because its a new body harness and new engine harness. Does it matter if the body harness is from an sohc car or dohc car? or if the ka harness that was made to work for sr was either sohc or dohc?

03-11-2015, 05:52 PM	#7
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	Okay so i have to remove just one injector or all 4? Id have to correct the timing again before i place the cas in right? or just do a full 360 turn and put it back in. Also i know that the injectors are firing so would it be possible the cas still be a problem? My main problem is that im not getting spark. I know i am getting fuel because my spark plugs smell like fuel

03-11-2015, 11:54 PM	#11
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	Yes, I am confident the chip works. i've tested it on an already running sr. Thank you guys for the input. Working on it tomorrow and seeing if anything comes up

03-13-2015, 01:13 PM	#14
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	So today i span the CAS while out of the engine (correctly) and there was still no spark. Does this mean the CAS is fried? Remember i accidentally hooked up the battery wrong momentarily and blew the alt fuse. Could it be possible i fried the wiring? i pulled the entire harness out and checked it closely and everything seems to be fine. I am confident the wiring is correct as i had a reputable guy do it. Last edited by regnaleb; 03-13-2015 at 02:35 PM..

03-20-2015, 06:00 PM	#15
lucas240sx Zilvia FREAK! Join Date: Sep 2006 Location: shawnee,okl Age: 37 Posts: 1,303 Trader Rating: (16) Feedback Score: 16 reviews	Do you have all the grounds for the engine? One off the intake next to throttle body to chassis, and behind head to chassis, and I think one more Then you have the coil pack ground wire that goes behind the head

04-01-2015, 03:01 PM	#17
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	Alright so i rewired the grey plug that plugs the engine harness to the body harness behind the battery. None of the wires matched the first time which is why i think the spark plugs werent sparking. So all of that is done now but still no start. Ive noticed that the headlights dim in and out while cranking but ive checked the grounds and all are doing their job. I also forgot to mention the engine is a type x sr20det blacktop. Any suggestions would be greatly appreciated

04-01-2015, 03:03 PM	#18
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	BUMP new stuff added

04-01-2015, 03:30 PM	#20
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 49 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Is the engine/ecu harness for a type x? From a Highly Tuned Note 4.5!!! __________________ LoverTechnologies "Half Broken Things!"

04-01-2015, 04:30 PM	#22
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	well i have an e5 ecu but the self diagnostic screw doesnt stop when i turn it... is there a way to bypass this. Would the wrong ecu make my lights dim like that? I also never seen my check engine light turn on

04-01-2015, 06:14 PM	#24
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	should i try soldering one from my 62? Shit im not good with pins and stuff... ill look up soldering a used thingy any good instructions on how to approach repinning something?

04-01-2015, 06:45 PM	#26
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 49 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	There's no difference there, that I'm aware of. The only thing I do extra to a type x, is the repinning. From a Highly Tuned Note 4.5!!! __________________ LoverTechnologies "Half Broken Things!"

04-01-2015, 07:22 PM	#27
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	hmmm, alright. Well even with the E5 its still not starting... I really dont know what else to do at this point.

04-01-2015, 08:12 PM	#28
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 49 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Start over, the wiring, timing the beginning. If you missed the block and coil pack ground etc. It could be something simple. Triple double! From a Highly Tuned Note 4.5!!! __________________ LoverTechnologies "Half Broken Things!"

04-01-2015, 09:05 PM	#29
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	Alright man I'll try checking over everything again I'll let you know what happens

04-02-2015, 12:29 PM	#30
regnaleb Leaky Injector Join Date: Apr 2013 Location: In the clouds Age: 31 Posts: 82 Trader Rating: (1) Feedback Score: 1 reviews	Okay new objectives. 1. How can i find out if my harness is a type x harness. I know i have a type x motor (well at least that is what ive been told by a pretty reputable guy). 2. Any instructions on how to repin my 62 ECU to work for a "type x harness" Or is it me rewiring my "blue plug" to be compatible with a 62 ECU. Which way is it? 3. I plugged in my E5 ecu today and i got no spark again so i thought it just might be stuck in diagnostic mode because that mode screw on the ecu is broken. All at the same time i checked for voltage on my CAS and it all read -0.5v... so yeah i dont know what the means lol. So basically I have no working E5 ecu. I dont know if i have a type X harness or not. When i do plug in the 62 ECU i get spark, fuel and it cranks but no fire. Any tips? Any help? Please lol