No start but back fire. sr20 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Pygmy240sx · 11-13-2016, 09:09 PM

Whats up guys.
I've recently decided to do an sr20det swap on my 240sx s13 that was automatic. but ive run into some trouble.
simply put the car just cranks and cranks with little backfire. ive timed the car multiple times but with no luck. same thing happens.
ive check spark and it is blue on all spark plugs. it smells of fuel and will flood the engine.
When i was doing the swap i messed up on the wiring on the passenger side behind the headlight but, I am assured that it is all fixed.
The only thing i could think it would be is the cas. as it has a bend on the disc but idk if that is normal or not.
Im gonna buy a new wiring harness just from wiring specialties but i honestly dont think it has to do with that area of wiring.

my real question is would a bend in the CAS completely disable the engine to not start at all? Some times when i turn the cas a little it will sputter but i havent heard the engine start.

anything helps. Will upload some pics of the cas and the engine. maybe make a small video on youtube this weekend to show whats happening and get some better knowledge of my situation to you guys..

RyukoSilvia · 11-15-2016, 04:37 PM

Maybe your igniter chip is bad?

blkvrtswp · 11-15-2016, 07:24 PM

Probably timing off and/or flooded. Remove and reinstall the CAS using the FSM steps - don't skip any. Pull the spark plugs and let the cylinders dry out - use a hair dryer if in a hurry. Make sure you change the oil to get rid of the gas from flooding - it can cause a spun bearing.

cotbu · 11-17-2016, 09:34 AM

I agree with timing off. Set the engine to tdc and reinstall the cas. If you cant hear when compression stroke is coming? Remove valve cover and make the cam lobes point outwards
<¤ ¤> and restab the cas per fsm. Snug up the bolts dont tighten them, after you get it running set base idle and timing.

Sent from my LG-H631 using Tapatalk

jedi03 · 11-18-2016, 07:39 AM

had b16 do this...timing was off

Karlhammer · 11-28-2016, 11:11 PM

Firing order

Karlhammer · 11-28-2016, 11:12 PM

Car has good compression?

zylvia213 · 12-01-2016, 10:43 PM

pretty good chance the CAS maybe causing this issue along with the timing. I had this problem with my 2jz. One of the tooth's on the CAS was chipped and it was throwing the ECU off. Set it to TDC and redo the timing first...if no go swap that CAS out. GL

11-13-2016, 09:09 PM	#1
Pygmy240sx Join Date: Nov 2015 Location: California Age: 27 Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	No start but back fire. sr20 Whats up guys. I've recently decided to do an sr20det swap on my 240sx s13 that was automatic. but ive run into some trouble. simply put the car just cranks and cranks with little backfire. ive timed the car multiple times but with no luck. same thing happens. ive check spark and it is blue on all spark plugs. it smells of fuel and will flood the engine. When i was doing the swap i messed up on the wiring on the passenger side behind the headlight but, I am assured that it is all fixed. The only thing i could think it would be is the cas. as it has a bend on the disc but idk if that is normal or not. Im gonna buy a new wiring harness just from wiring specialties but i honestly dont think it has to do with that area of wiring. my real question is would a bend in the CAS completely disable the engine to not start at all? Some times when i turn the cas a little it will sputter but i havent heard the engine start. anything helps. Will upload some pics of the cas and the engine. maybe make a small video on youtube this weekend to show whats happening and get some better knowledge of my situation to you guys..

11-17-2016, 09:34 AM	#4
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	I agree with timing off. Set the engine to tdc and reinstall the cas. If you cant hear when compression stroke is coming? Remove valve cover and make the cam lobes point outwards <¤ ¤> and restab the cas per fsm. Snug up the bolts dont tighten them, after you get it running set base idle and timing. Sent from my LG-H631 using Tapatalk __________________ LoverTechnologies "Half Broken Things!"

12-01-2016, 10:43 PM	#8
zylvia213 Nissanaholic! Join Date: Aug 2007 Location: LOST ANGELES Posts: 1,978 Trader Rating: (36) Rides Gallery: zylvia213 Feedback Score: 36 reviews	pretty good chance the CAS maybe causing this issue along with the timing. I had this problem with my 2jz. One of the tooth's on the CAS was chipped and it was throwing the ECU off. Set it to TDC and redo the timing first...if no go swap that CAS out. GL __________________

11-15-2016, 04:37 PM	#2
RyukoSilvia Join Date: Nov 2016 Location: Oahu Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	Maybe your igniter chip is bad?

11-15-2016, 07:24 PM	#3
blkvrtswp Zilvia Addict Join Date: Oct 2012 Location: NY Posts: 692 Trader Rating: (9) Feedback Score: 9 reviews	Probably timing off and/or flooded. Remove and reinstall the CAS using the FSM steps - don't skip any. Pull the spark plugs and let the cylinders dry out - use a hair dryer if in a hurry. Make sure you change the oil to get rid of the gas from flooding - it can cause a spun bearing.

11-18-2016, 07:39 AM	#5
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,842 Trader Rating: (8) Feedback Score: 8 reviews	had b16 do this...timing was off

11-28-2016, 11:11 PM	#6
Karlhammer Leaky Injector Join Date: Jan 2015 Location: Minnesota Age: 37 Posts: 60 Trader Rating: (4) Feedback Score: 4 reviews	Firing order

11-28-2016, 11:12 PM	#7
Karlhammer Leaky Injector Join Date: Jan 2015 Location: Minnesota Age: 37 Posts: 60 Trader Rating: (4) Feedback Score: 4 reviews	Car has good compression?