I'm getting seriously frustrated. Sr20 wont fire - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

landins13 · 02-21-2008, 03:32 PM

93 nissan 240sx with red top sr20, i blew up my motor rebuilt it and put everything back together, i am not getting a spark at all, engine will not fire. I was told before to check my wiring, my ignitor, and my ECU. I pulled the entire wiring harness re did it and re-installed it, i replaced my ignitor, i replaced my ECU. I am still not getting any spark, and the engine still does not fire. does anyone know the voltages for the power wire and signal wire at the coils and does anyone know the voltages my CAS should be recieiving and putting out.
Thanks, Landin

SoSideways · 02-21-2008, 03:37 PM

Get a hold on an S14 w/ SR20DET FSM... everything's in there...

*NemeGuero* · 02-21-2008, 03:40 PM

You should get a KA.

Distributors rawk.

SnakeKack · 02-21-2008, 03:44 PM

^^ I agree NemeGuero.

Vision Garage · 02-21-2008, 03:57 PM

Hahaha. Unhelpful bastards!

Grab a multimeter and trace where the power is going and where its not going. Maybe your cross some wires wrong.

unicoladron · 02-21-2008, 06:01 PM

there is also a diagnostic procedure you can use by connecting LEDs to your ignition (somwhere near coilpacks) then pulling your CAS, turning it by hand, and seeing if the LEDs flash. someone chime in if they know what i'm talking about. i know i didn't make this up. the procedure may be in the electrical/ignition section of the FSM. this will determine if you have a bad CAS. it could also be your ignition wiring, i remember hearing of issues with that.

landins13 · 02-21-2008, 06:06 PM

ive checked all of the wiring, the car was running without a problem until it blew up, none of the wiring was changed, and i removed all of the wiring once i started having this problem and inspected it for problems. The wiring is good. I'm having trouble getting a hold of a repair manual, if you have any sites or suggestions let me know. and the procedure i think youre talking about would be using a timing light, but that wont really help me with getting a fire, unless im thinking of something different. I really appreciate the insight, if you have any other suggestion please let me know.
Thanks again, Landin

onyxaltezza · 02-21-2008, 06:18 PM

Timing? Distributor?

-Aaron

johngriff · 02-21-2008, 06:25 PM

Take out the cas, spin it. Are the injectors clicking?

Test continuity from the ignitor chip plug (ecu harness side) to the ecu. Test the coil pack harness the other way. Do this by using a resistance test, if the resistance is too high, I am guessing its bad.

Um, Check for power on the injector wires. If no injectors + no coil packs, probably a bad egi relay.

unicoladron · 02-21-2008, 06:27 PM

Quote:

Originally Posted by onyxaltezza

Timing? Distributor?

-Aaron

his SR20 doesn't have a distributor, it uses a camshaft position sensor.

but i swear there was some other procedure..but now that makes me thing of something else. i'm still stuck on the CAS, because it's the only part of your ignition system you haven't tested. here is a procedure from the FSM, the procedure i was thinking of was for injector pulse i think...oops. but here try this maybe:

is your mechanical timing in spec?

how do you know you're not getting spark? did you crank the engine with your coil packs out with an extra spark plug and hold it ~1 inch from your valve cover and look for an electric pulse while cranking?

unicoladron · 02-21-2008, 06:29 PM

ahhh! did you check your ecu for codes too!? if you haven't yet, check now!

johngriff · 02-21-2008, 06:56 PM

It is not sparking.

Its also not going to generate codes until it runs probably..

WISH ONE · 02-21-2008, 07:12 PM

Im getting sick of my sr also! bELIEVE ME! i have a similar problem, fuel spark and to my knowledge timing is there, but no firing at all. anyone wanna buy an sr set up lol. good luck keep us posted.

mestizo · 02-21-2008, 07:25 PM

THis may sound like an obvious and stupid comment but did you check your fuses and grounds?

WISH ONE · 02-22-2008, 01:50 AM

check your cas?i tested it the first time and all the injectors seemed to pop fine when i spun it on second look i finally figured out why mine wouldnt start i tore my cas apart and the metal disk inside had a little hole burned out of it.

landins13 · 02-23-2008, 12:39 AM

ok so here is the update. all of my wiring is good, i pulled the entire harness again and rechecked its all good. I havent checked my CAS but i have a slightly larger concern after talking to a friend of mine that is a master tech for mercedes. he listened to it turning and said it almost sounds like im getting not compression, so tomorrow im going to compression test it. Ive done the ignition spark test as described above, i finally found a FSM for my car, its for an s14 but hopefully it will help me with my redtop. Um as far as anything else....ignitor is new, starter is new, ECU is new, i also have a mines ECU (IN CASE ) oh im definitely getting fuel, my timing is perfect, im just kind of at a stand still, i'm feeling like its gotta be something with the coils and/or the CAS hopefully its something simple cuz those are both expensive and im really not trying to give up on this thing. My fault though, i was making stupid power on stock internals and i ran the motor almost dry so yeah.

I appreciate all the help guys really, ill keep updating with any news.
Thanks again, Landin

landins13 · 02-23-2008, 12:42 AM

forgot to mention, i checked the fuses and grounds. Sorry, ive done a lot in the past few days plus work, school, snow, flu, im pretty sure ive lost my mind.

thanks, landin

mxsx25 · 02-23-2008, 08:15 AM

if your deffinately getting fuel, than that means the cas should be good, ohm test your coil packs , and is your igniter BRAN new or just bran new-second hand lol could be faulty... i had sorta the same problem for a while, and it ended up being both my cas and igniter

hstylez · 02-23-2008, 12:50 PM

Recheck grounds. I had no spark when I didn't have a ground on my valve cover...

cotbu · 02-23-2008, 01:52 PM

Quote:

Its also not going to generate codes until it runs probably..

Good save!

I say. if it's not an obvious problem, reverse engineer it! Look at all the things that would cause your car not to start under normal circumstances.

Also you must mean mechanical timing is perfect, because you haven't started the car yet. What was the results of the compression test?

Pop in the other ecu to maybe eliminate an ecu problem. I'd really like to hear the sound it makes when your trying to start it.

I also have a shit load of tests that I would have you do, but that's just redundant at this point.

Continuity test the harness would be #1 before the ecu swap.

johngriff · 02-23-2008, 02:01 PM

Sounds like it has no compression? You would know.

Fuel + Spark + Compression = Run. Its got to be one of those 3.

blownmotor · 02-23-2008, 02:48 PM

you probably could have flooded the combustion chamber from all those times of cranking pour some oil in to each cylinder before you crank it next time see if your ignitor is getting any power from the ecu and power coming out of the ignitor

WISH ONE · 02-24-2008, 08:17 PM

Quote:

Originally Posted by landins13

I havent checked my CAS but i have a slightly larger concern after talking to a friend of mine that is a master tech for mercedes.

... make sure you really check everything, i had 3 nissan master techs a stuck on why mine wasnt starting, they all looked right past the cas issue. good luck with the comp issue

OfourTHREEfive · 02-24-2008, 09:38 PM

Any update on the status, I hate unfinished stories

Chrischeezer · 02-24-2008, 10:26 PM

Quote:

Originally Posted by johngriff

Sounds like it has no compression? You would know.

Fuel + Spark + Compression = Run. Its got to be one of those 3.

Yep... check compression buddy...

blu808 · 02-24-2008, 10:29 PM

You know the cas has to be set on a specific tooth right?

If it is off the car wont run.

mxsx25 · 02-25-2008, 10:16 PM

cas and/or igniter... had the same problem... swapped em and started right up

blu808 · 02-25-2008, 10:25 PM

good going man. Hows it run?

landins13 · 02-25-2008, 10:50 PM

the car still isn't running, ive gotten kinda side tracked with my 280z. I need to check the compression still, as well as the coils, ignitor is good, im getting fuel, the CAS is in the proper location according to my FSM the only things left that i can think of are the coils and the compression, i made the mistake of loaning a friend my multimeter so i need to get that back. Until then there wont be any updates, i mean in the time ive been waiting on things i lowered the car, started measuring and fabricating my cage, i got my hands on a set of Hayashi racing wheels from the 70's they are the ugliest things ever but i love them lol, they are only 14's but they weigh less than 10 lbs each the fronts are 14x7 +13 offset and the rear are 14x9 +22 offset, they should look obnoxiously good with some drag radials on them

landins13 · 02-25-2008, 10:53 PM

i didnt see the question about the ignitor until just now, sorry, im running a z32 ignitor and it is brand new, i got ignorant special ordered it from advance auto parts, swapped it with the one i had and returned that one and told them it was the wrong part and got them to refund me.

im real close with the manager and thats what he told me to do so its w/e, lol i spend so much time at advance that i have a commercial account with them.

02-21-2008, 03:40 PM	#3
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	You should get a KA. Distributors rawk. __________________

02-21-2008, 03:57 PM	#5
Vision Garage Nissanaholic! Join Date: Apr 2007 Location: USDM Land Posts: 1,799 Trader Rating: (9) Feedback Score: 9 reviews	Hahaha. Unhelpful bastards! Grab a multimeter and trace where the power is going and where its not going. Maybe your cross some wires wrong. __________________

02-21-2008, 06:01 PM	#6
unicoladron Zilvia Junkie Join Date: Jul 2007 Location: Long Island, NY Age: 40 Posts: 568 Trader Rating: (0) Feedback Score: 0 reviews	there is also a diagnostic procedure you can use by connecting LEDs to your ignition (somwhere near coilpacks) then pulling your CAS, turning it by hand, and seeing if the LEDs flash. someone chime in if they know what i'm talking about. i know i didn't make this up. the procedure may be in the electrical/ignition section of the FSM. this will determine if you have a bad CAS. it could also be your ignition wiring, i remember hearing of issues with that. __________________ 1993 KA24DE for sale with 180k..running when pulled.... need to get rid of ASAP...i'm moving

02-21-2008, 06:18 PM	#8
onyxaltezza Join Date: Jul 2006 Location: 626.909 Posts: 46 Trader Rating: (0) Feedback Score: 0 reviews	Timing? Distributor? -Aaron __________________

02-21-2008, 06:25 PM	#9
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Take out the cas, spin it. Are the injectors clicking? Test continuity from the ignitor chip plug (ecu harness side) to the ecu. Test the coil pack harness the other way. Do this by using a resistance test, if the resistance is too high, I am guessing its bad. Um, Check for power on the injector wires. If no injectors + no coil packs, probably a bad egi relay. __________________ [email protected]

02-21-2008, 03:32 PM	#1
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	I'm getting seriously frustrated. Sr20 wont fire 93 nissan 240sx with red top sr20, i blew up my motor rebuilt it and put everything back together, i am not getting a spark at all, engine will not fire. I was told before to check my wiring, my ignitor, and my ECU. I pulled the entire wiring harness re did it and re-installed it, i replaced my ignitor, i replaced my ECU. I am still not getting any spark, and the engine still does not fire. does anyone know the voltages for the power wire and signal wire at the coils and does anyone know the voltages my CAS should be recieiving and putting out. Thanks, Landin

02-21-2008, 03:37 PM	#2
SoSideways Post Whore! Join Date: Apr 2003 Location: 你老母 Posts: 4,371 Trader Rating: (4) Feedback Score: 4 reviews	Get a hold on an S14 w/ SR20DET FSM... everything's in there...

02-21-2008, 03:44 PM	#4
SnakeKack Zilvia Junkie Join Date: Dec 2005 Location: Florida Age: 37 Posts: 306 Trader Rating: (6) Feedback Score: 6 reviews	^^ I agree NemeGuero.

02-21-2008, 06:06 PM	#7
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	ive checked all of the wiring, the car was running without a problem until it blew up, none of the wiring was changed, and i removed all of the wiring once i started having this problem and inspected it for problems. The wiring is good. I'm having trouble getting a hold of a repair manual, if you have any sites or suggestions let me know. and the procedure i think youre talking about would be using a timing light, but that wont really help me with getting a fire, unless im thinking of something different. I really appreciate the insight, if you have any other suggestion please let me know. Thanks again, Landin

02-21-2008, 06:29 PM	#11
unicoladron Zilvia Junkie Join Date: Jul 2007 Location: Long Island, NY Age: 40 Posts: 568 Trader Rating: (0) Feedback Score: 0 reviews	ahhh! did you check your ecu for codes too!? if you haven't yet, check now! __________________ 1993 KA24DE for sale with 180k..running when pulled.... need to get rid of ASAP...i'm moving

02-21-2008, 06:56 PM	#12
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	It is not sparking. Its also not going to generate codes until it runs probably.. __________________ [email protected]

02-21-2008, 07:12 PM	#13
WISH ONE Post Whore! Join Date: Aug 2006 Location: orange county ca Posts: 2,738 Trader Rating: (13) Feedback Score: 13 reviews	Im getting sick of my sr also! bELIEVE ME! i have a similar problem, fuel spark and to my knowledge timing is there, but no firing at all. anyone wanna buy an sr set up lol. good luck keep us posted. __________________ PARTING/SELLING MY COUPE. PM ME.

02-21-2008, 07:25 PM	#14
mestizo Zilvia Junkie Join Date: Nov 2006 Location: Sacramento California Posts: 360 Trader Rating: (8) Feedback Score: 8 reviews	THis may sound like an obvious and stupid comment but did you check your fuses and grounds? __________________ 92 S13 Coupe Track Car

02-22-2008, 01:50 AM	#15
WISH ONE Post Whore! Join Date: Aug 2006 Location: orange county ca Posts: 2,738 Trader Rating: (13) Feedback Score: 13 reviews	check your cas?i tested it the first time and all the injectors seemed to pop fine when i spun it on second look i finally figured out why mine wouldnt start i tore my cas apart and the metal disk inside had a little hole burned out of it. __________________ PARTING/SELLING MY COUPE. PM ME.

02-23-2008, 12:39 AM	#16
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	ok so here is the update. all of my wiring is good, i pulled the entire harness again and rechecked its all good. I havent checked my CAS but i have a slightly larger concern after talking to a friend of mine that is a master tech for mercedes. he listened to it turning and said it almost sounds like im getting not compression, so tomorrow im going to compression test it. Ive done the ignition spark test as described above, i finally found a FSM for my car, its for an s14 but hopefully it will help me with my redtop. Um as far as anything else....ignitor is new, starter is new, ECU is new, i also have a mines ECU (IN CASE ) oh im definitely getting fuel, my timing is perfect, im just kind of at a stand still, i'm feeling like its gotta be something with the coils and/or the CAS hopefully its something simple cuz those are both expensive and im really not trying to give up on this thing. My fault though, i was making stupid power on stock internals and i ran the motor almost dry so yeah. I appreciate all the help guys really, ill keep updating with any news. Thanks again, Landin

02-23-2008, 12:42 AM	#17
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	forgot to mention, i checked the fuses and grounds. Sorry, ive done a lot in the past few days plus work, school, snow, flu, im pretty sure ive lost my mind. thanks, landin

02-23-2008, 08:15 AM	#18
mxsx25 Zilvia Junkie Join Date: Sep 2007 Location: hudson NH Age: 36 Posts: 415 Trader Rating: (0) Feedback Score: 0 reviews	if your deffinately getting fuel, than that means the cas should be good, ohm test your coil packs , and is your igniter BRAN new or just bran new-second hand lol could be faulty... i had sorta the same problem for a while, and it ended up being both my cas and igniter

02-23-2008, 12:50 PM	#19
hstylez Zilvia Member Join Date: Mar 2006 Location: Ohio Posts: 253 Trader Rating: (4) Feedback Score: 4 reviews	Recheck grounds. I had no spark when I didn't have a ground on my valve cover... __________________ S13 Coupe SR20DET

02-23-2008, 02:01 PM	#21
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Sounds like it has no compression? You would know. Fuel + Spark + Compression = Run. Its got to be one of those 3. __________________ [email protected]

02-23-2008, 02:48 PM	#22
blownmotor Zilvia Junkie Join Date: May 2006 Location: land of the sideshows Posts: 402 Trader Rating: (0) Feedback Score: 0 reviews	you probably could have flooded the combustion chamber from all those times of cranking pour some oil in to each cylinder before you crank it next time see if your ignitor is getting any power from the ecu and power coming out of the ignitor

02-24-2008, 09:38 PM	#24
OfourTHREEfive Zilvia Member Join Date: Dec 2007 Location: Florida Age: 37 Posts: 174 Trader Rating: (1) Feedback Score: 1 reviews	Any update on the status, I hate unfinished stories

02-24-2008, 10:29 PM	#26
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 42 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	You know the cas has to be set on a specific tooth right? If it is off the car wont run. __________________

02-25-2008, 10:16 PM	#27
mxsx25 Zilvia Junkie Join Date: Sep 2007 Location: hudson NH Age: 36 Posts: 415 Trader Rating: (0) Feedback Score: 0 reviews	cas and/or igniter... had the same problem... swapped em and started right up

02-25-2008, 10:25 PM	#28
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 42 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	good going man. Hows it run? __________________

02-25-2008, 10:50 PM	#29
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	the car still isn't running, ive gotten kinda side tracked with my 280z. I need to check the compression still, as well as the coils, ignitor is good, im getting fuel, the CAS is in the proper location according to my FSM the only things left that i can think of are the coils and the compression, i made the mistake of loaning a friend my multimeter so i need to get that back. Until then there wont be any updates, i mean in the time ive been waiting on things i lowered the car, started measuring and fabricating my cage, i got my hands on a set of Hayashi racing wheels from the 70's they are the ugliest things ever but i love them lol, they are only 14's but they weigh less than 10 lbs each the fronts are 14x7 +13 offset and the rear are 14x9 +22 offset, they should look obnoxiously good with some drag radials on them

02-25-2008, 10:53 PM	#30
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	i didnt see the question about the ignitor until just now, sorry, im running a z32 ignitor and it is brand new, i got ignorant special ordered it from advance auto parts, swapped it with the one i had and returned that one and told them it was the wrong part and got them to refund me. im real close with the manager and thats what he told me to do so its w/e, lol i spend so much time at advance that i have a commercial account with them.