Sr20det wont stay running and bogs out - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

wakeboarder843 · 09-13-2012, 03:03 PM

I just swapped a blacktop sr into my car and it will start up for maybe 5 seconds then dies and runs terrible

today I took the valve cover off and checked the cas and everything was good I cant check the timing because I cant get it to run long enough

I also replaced the spark plugs and turned the car over while I had the plugs out in the coils and they are all firing and in the correct order so I know Im getting spark

I ordered a z32 maf and it seems to be working but how do you know if the maf is good or bad? when I unplug the maf the car revs by itself to 4000 rpm then dies

Any other suggestions? Im running out of Ideas here

here is a short video of what it does

Sr20det wont run - YouTube

di-devol · 09-13-2012, 05:16 PM

What's done to the motor? Biggier injectors? What are you running for a tune?

AsleepAltima · 09-13-2012, 05:18 PM

Quote:

Originally Posted by di-devol

What's done to the motor? Biggier injectors? What are you running for a tune?

this. also, which maf? stock sr or different one?

*wangan_cruiser* · 09-13-2012, 07:12 PM

Try to adjusy the iacv valve and see if the idle changes. Or u can unplug the connector and check for voltage.

Lil_D · 09-13-2012, 07:21 PM

vacuum leak? timing off??

SnakeKack · 09-13-2012, 07:29 PM

Is it getting fuel?

wakeboarder843 · 09-13-2012, 08:32 PM

It's a stock motor haven't had it tuned as I just put it in and am trying to get it running properly. It has a z32 maf and other upgrades are just the regular swap things like intercooler greddy intake radiator etc..

I know it's getting fuel because I can smell it and one of the fuel lines was loose when I first started it and was leaking fuel all over the intake manifold and also I squeezed the fuel line and I can feel that it has pressure

wakeboarder843 · 09-13-2012, 08:34 PM

Quote:

Originally Posted by wangan_cruiser

Try to adjusy the iacv valve and see if the idle changes. Or u can unplug the connector and check for voltage.

How do you adjust the ivac valve? I've heard of ppls ivac having a vacuum leak but from eye balling it I don't see anything

AsleepAltima · 09-13-2012, 08:55 PM

Quote:

Originally Posted by wakeboarder843

It's a stock motor haven't had it tuned as I just put it in and am trying to get it running properly. It has a z32 maf and other upgrades are just the regular swap things like intercooler greddy intake radiator etc..

I know it's getting fuel because I can smell it and one of the fuel lines was loose when I first started it and was leaking fuel all over the intake manifold and also I squeezed the fuel line and I can feel that it has pressure

z32 maf on stock sr ecu?

wakeboarder843 · 09-13-2012, 08:59 PM

Yea. Since I had to get a new intake I figured I'd get the z32 maf with it. Does that cause problems on a stock motor?

I tried to see if the maf was bad so I unplugged it and it just revs super high then dies

AsleepAltima · 09-13-2012, 09:03 PM

yes. you need a stock sr ecu. the ecu has to be told that you are using a different maf.

billiam · 09-13-2012, 09:04 PM

new fuel pump and youll be good

wakeboarder843 · 09-13-2012, 09:06 PM

Ok so I can't run a z32 maf with the stock sr ecu then? I have a j4 ecu cause it's a type x blacktop. What do I need to do to the ecu to run a z32 maf? Would a tune work or do I need like an air fuel controller or something?

AsleepAltima · 09-13-2012, 09:12 PM

you have to have a tune for it. well, i guess there is a way you can do it with an safc, but i dont know how.

wakeboarder843 · 09-13-2012, 09:21 PM

Yea I didn't realize that you couldn't just swap out the maf. Will the stock ka maf work with the sr ecu?

AsleepAltima · 09-13-2012, 09:24 PM

i dont think it will. you dont have the stock sr maf?

AsleepAltima · 09-13-2012, 09:27 PM

i might have an extra sr ecu but i wont know till tomorrow. i wrote ecu but i meant maf.

wakeboarder843 · 09-13-2012, 09:27 PM

No I just have all my old parts from my ka. The swap came with motor tranny ecu harness and ignitor but no maf

The question now is would it be cheaper to get a tune or af controller or to buy a stock maf and different intake

AsleepAltima · 09-13-2012, 09:30 PM

a tune is around 500 bucks depending on who you go to. you might even be able to buy an ecu already tuned for what you need. thats what i did when i bought my jwt ecu - it goes along completely with my build. but youre looking at close to 600 bucks for that route.

wakeboarder843 · 09-13-2012, 09:33 PM

Hmm ok I'll look into it thanks for the help hopefully this solves my problem!

S14Driftr91 · 09-13-2012, 09:38 PM

Your ecu is stock im guessing... in order to run a z32 maf you would have to get the ecu tuned to run the z32 maf. Now if your only upgrades are intercooler and maf, getting a tune is going to be more costly than just switching to a SR maf

Srsil · 09-13-2012, 09:38 PM

Sounds like u disnt even hook up the iacv also iv ran into this prob with a ka check ur dash plug wiring i.e the plug above the ecu begind the glove box and u do know that the type x harness needs to be wired diffrent than a regular sr

wakeboarder843 · 09-13-2012, 09:46 PM

Yea I might just buy an sr maf then but idk if it will fit with the greddy airnix intake that I bought

I bought a type x harness from wiring specialties so I think my wiring is good and the dash plug is connected

rwtf · 09-13-2012, 09:56 PM

inb4tehfail.....oh wait.

09-13-2012, 03:03 PM	#1
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det wont stay running and bogs out I just swapped a blacktop sr into my car and it will start up for maybe 5 seconds then dies and runs terrible today I took the valve cover off and checked the cas and everything was good I cant check the timing because I cant get it to run long enough I also replaced the spark plugs and turned the car over while I had the plugs out in the coils and they are all firing and in the correct order so I know Im getting spark I ordered a z32 maf and it seems to be working but how do you know if the maf is good or bad? when I unplug the maf the car revs by itself to 4000 rpm then dies Any other suggestions? Im running out of Ideas here here is a short video of what it does Sr20det wont run - YouTube

09-13-2012, 09:27 PM	#17
AsleepAltima Zilvia Addict Join Date: Aug 2006 Location: Ontario, Ca Age: 51 Posts: 667 Trader Rating: (8) Feedback Score: 8 reviews	i might have an extra sr ecu but i wont know till tomorrow. i wrote ecu but i meant maf. Last edited by AsleepAltima; 09-14-2012 at 06:12 AM.. Reason: wrote the wrong thing...

09-13-2012, 09:38 PM	#21
S14Driftr91 Zilvia Junkie Join Date: May 2008 Location: Poughkeepsie, NY Posts: 583 Trader Rating: (26) Feedback Score: 26 reviews	Your ecu is stock im guessing... in order to run a z32 maf you would have to get the ecu tuned to run the z32 maf. Now if your only upgrades are intercooler and maf, getting a tune is going to be more costly than just switching to a SR maf __________________ www.allthingsproper.com

09-13-2012, 09:56 PM	#24
rwtf Zilvia Addict Join Date: Jun 2011 Location: Maryville, TN Age: 32 Posts: 830 Trader Rating: (3) Feedback Score: 3 reviews	inb4tehfail.....oh wait. __________________

09-13-2012, 05:16 PM	#2
di-devol Zilvia FREAK! Join Date: Jun 2010 Location: Woodinville Age: 42 Posts: 1,412 Trader Rating: (5) Feedback Score: 5 reviews	What's done to the motor? Biggier injectors? What are you running for a tune?

09-13-2012, 07:12 PM	#4
wangan_cruiser kouki man Join Date: Apr 2006 Location: downtown oakland,ca Age: 39 Posts: 3,535 Trader Rating: (36) Feedback Score: 36 reviews	Try to adjusy the iacv valve and see if the idle changes. Or u can unplug the connector and check for voltage.

09-13-2012, 07:21 PM	#5
Lil_D Zilvia Addict Join Date: Nov 2010 Location: The Bay Area Age: 31 Posts: 733 Trader Rating: (5) Feedback Score: 5 reviews	vacuum leak? timing off??

09-13-2012, 07:29 PM	#6
SnakeKack Zilvia Junkie Join Date: Dec 2005 Location: Florida Age: 36 Posts: 306 Trader Rating: (6) Feedback Score: 6 reviews	Is it getting fuel?

09-13-2012, 08:32 PM	#7
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	It's a stock motor haven't had it tuned as I just put it in and am trying to get it running properly. It has a z32 maf and other upgrades are just the regular swap things like intercooler greddy intake radiator etc.. I know it's getting fuel because I can smell it and one of the fuel lines was loose when I first started it and was leaking fuel all over the intake manifold and also I squeezed the fuel line and I can feel that it has pressure

09-13-2012, 08:59 PM	#10
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	Yea. Since I had to get a new intake I figured I'd get the z32 maf with it. Does that cause problems on a stock motor? I tried to see if the maf was bad so I unplugged it and it just revs super high then dies

09-13-2012, 09:03 PM	#11
AsleepAltima Zilvia Addict Join Date: Aug 2006 Location: Ontario, Ca Age: 51 Posts: 667 Trader Rating: (8) Feedback Score: 8 reviews	yes. you need a stock sr ecu. the ecu has to be told that you are using a different maf.

09-13-2012, 09:04 PM	#12
billiam Join Date: Sep 2011 Location: Toronto, Ont Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	new fuel pump and youll be good

09-13-2012, 09:06 PM	#13
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	Ok so I can't run a z32 maf with the stock sr ecu then? I have a j4 ecu cause it's a type x blacktop. What do I need to do to the ecu to run a z32 maf? Would a tune work or do I need like an air fuel controller or something?

09-13-2012, 09:12 PM	#14
AsleepAltima Zilvia Addict Join Date: Aug 2006 Location: Ontario, Ca Age: 51 Posts: 667 Trader Rating: (8) Feedback Score: 8 reviews	you have to have a tune for it. well, i guess there is a way you can do it with an safc, but i dont know how.

09-13-2012, 09:21 PM	#15
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	Yea I didn't realize that you couldn't just swap out the maf. Will the stock ka maf work with the sr ecu?

09-13-2012, 09:24 PM	#16
AsleepAltima Zilvia Addict Join Date: Aug 2006 Location: Ontario, Ca Age: 51 Posts: 667 Trader Rating: (8) Feedback Score: 8 reviews	i dont think it will. you dont have the stock sr maf?

09-13-2012, 09:30 PM	#19
AsleepAltima Zilvia Addict Join Date: Aug 2006 Location: Ontario, Ca Age: 51 Posts: 667 Trader Rating: (8) Feedback Score: 8 reviews	a tune is around 500 bucks depending on who you go to. you might even be able to buy an ecu already tuned for what you need. thats what i did when i bought my jwt ecu - it goes along completely with my build. but youre looking at close to 600 bucks for that route.

09-13-2012, 09:33 PM	#20
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	Hmm ok I'll look into it thanks for the help hopefully this solves my problem!

09-13-2012, 09:38 PM	#22
Srsil Leaky Injector Join Date: Mar 2012 Location: Olympia Age: 33 Posts: 77 Trader Rating: (0) Feedback Score: 0 reviews	Sounds like u disnt even hook up the iacv also iv ran into this prob with a ka check ur dash plug wiring i.e the plug above the ecu begind the glove box and u do know that the type x harness needs to be wired diffrent than a regular sr

09-13-2012, 09:46 PM	#23
wakeboarder843 Join Date: Feb 2011 Location: Miami, Fl Age: 35 Posts: 26 Trader Rating: (0) Feedback Score: 0 reviews	Yea I might just buy an sr maf then but idk if it will fit with the greddy airnix intake that I bought I bought a type x harness from wiring specialties so I think my wiring is good and the dash plug is connected