Tuning Issues - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

keefus16 · 10-29-2009, 10:20 PM

I have s14 with s13 sr20det. I can't get the car to run. I have 550cc injectors, z32 maf and safc2. I have tried several settings and nothing is working for me. I have checked timing, spark and fuel. I timing is correct, getting plenty of fuel and even changed plugs after testing spark. Nothing. The turbo has been upgraded as well if that matters. Any Ideas?

slider2828 · 10-30-2009, 09:49 AM

Take a picture of all 4 spark plugs and uploaded. Also is there fuel smell on the plugs or oily stuff? Is the wiring done right?

keefus16 · 10-30-2009, 03:04 PM

the plugs that were in it were all black and look to be fouled and yes they smelt like fuel - i changed them out and still nothing -

pete240 · 10-30-2009, 03:15 PM

What are you using to correct for the z32 maf? You can just slap it on and expect it to run.....

slider2828 · 10-30-2009, 03:46 PM

^^^ What he said, so sounds like your timing is ok....

ericb382 · 10-30-2009, 09:18 PM

Was it running ok, then you changed turbo/maf/inj. and then it won't run? Or is it a fresh swap you're trying to get running? Or you've been running this setup and all the sudden won't start?

Do you have a stock ecu with just an safc?

keefus16 · 11-12-2009, 10:17 PM

I have stock ecu with safc2 and this was a fresh swap but I updgraded the turbo

fcdrifter20 · 11-12-2009, 11:11 PM

was it running before at all?? when ur running the z32 maf the in and out should be 2in 5 out. if im not mistakin. tha usualy wut i use and then just change the correction on the fuel from thr. depending on wut the a/f guage is doing. do u have a/f guage hooked up?? is the maf connected rite. try disconecting it and see if it starts up??

keefus16 · 11-13-2009, 08:37 AM

I will try that - I did set the SAFC2 to 2in 5out for hotwire - it seems to run for a second with that setting but then cut off - do you think the ECU could be the issue? - I am just curious -

s13_sr20det · 11-13-2009, 09:16 AM

its supposed to be 2in 6 out. thats how i have it setup with my safc2 and works fine.

fcdrifter20 · 11-13-2009, 10:59 AM

Quote:

Originally Posted by keefus16

I will try that - I did set the SAFC2 to 2in 5out for hotwire - it seems to run for a second with that setting but then cut off - do you think the ECU could be the issue? - I am just curious -

Quote:

Originally Posted by s13_sr20det

its supposed to be 2in 6 out. thats how i have it setup with my safc2 and works fine.

2in 5 out. or 2 in 6 out. somwhere around that range. its seems like u may be running to rich at start up.ur gona have to play with the fuel to get it to run right. do u have an a/f gauge conected.

keefus16 · 11-13-2009, 12:45 PM

Yes I do but I dont have a wideband - i know i need one but I dont have the cash at the moment - the guage is showing rich - im just trying to make sure the ECU isn't the issue - b/c i want to take it and get it dyno tuned

jspaeth · 11-13-2009, 02:45 PM

There is no real point in paying someone to dyno tune your car with an SAFC.

You can only control fuel, not timing right?

In that case, just get a wideband and tune the AFRs on the street with the wideband and SAFC.

ericb382 · 11-14-2009, 01:48 PM

I have never used an safc but from how i understand it, it modifies the input signal from the maf, thus changing both fuel and ignition. If you're "tricking" the ecu into thinking there's less air, this could be dangerous tuning using just a wideband, because you will end up advancing the timing where it may/will be dangerous. I agree with you that "dyno tuning" with an safc is a waste. The $ spent on "dyno tuning" would be better spent just getting a rom tune. Or you could buy a programable daughter board with that $, and sell the safc to partially pay for real dyno tuning. Do it right instead of trying to band-aid with an safc.

10-29-2009, 10:20 PM	#1
keefus16 Leaky Injector Join Date: Jul 2009 Location: Georgia Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	Tuning Issues I have s14 with s13 sr20det. I can't get the car to run. I have 550cc injectors, z32 maf and safc2. I have tried several settings and nothing is working for me. I have checked timing, spark and fuel. I timing is correct, getting plenty of fuel and even changed plugs after testing spark. Nothing. The turbo has been upgraded as well if that matters. Any Ideas?

10-30-2009, 09:49 AM	#2
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	Take a picture of all 4 spark plugs and uploaded. Also is there fuel smell on the plugs or oily stuff? Is the wiring done right? __________________ Turn and Burn!

10-30-2009, 03:46 PM	#5
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	^^^ What he said, so sounds like your timing is ok.... __________________ Turn and Burn!

11-13-2009, 02:45 PM	#13
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	There is no real point in paying someone to dyno tune your car with an SAFC. You can only control fuel, not timing right? In that case, just get a wideband and tune the AFRs on the street with the wideband and SAFC. __________________ Daily driven

10-30-2009, 03:04 PM	#3
keefus16 Leaky Injector Join Date: Jul 2009 Location: Georgia Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	the plugs that were in it were all black and look to be fouled and yes they smelt like fuel - i changed them out and still nothing -

10-30-2009, 03:15 PM	#4
pete240 Leaky Injector Join Date: Mar 2007 Location: SATX Age: 37 Posts: 124 Trader Rating: (4) Feedback Score: 4 reviews	What are you using to correct for the z32 maf? You can just slap it on and expect it to run.....

10-30-2009, 09:18 PM	#6
ericb382 Zilvia Member Join Date: Oct 2005 Location: Mesa, Az Posts: 293 Trader Rating: (4) Feedback Score: 4 reviews	Was it running ok, then you changed turbo/maf/inj. and then it won't run? Or is it a fresh swap you're trying to get running? Or you've been running this setup and all the sudden won't start? Do you have a stock ecu with just an safc?

11-12-2009, 10:17 PM	#7
keefus16 Leaky Injector Join Date: Jul 2009 Location: Georgia Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	I have stock ecu with safc2 and this was a fresh swap but I updgraded the turbo

11-12-2009, 11:11 PM	#8
fcdrifter20 Post Whore! Join Date: Nov 2007 Location: riverside, ca Age: 37 Posts: 2,869 Trader Rating: (44) Feedback Score: 44 reviews	was it running before at all?? when ur running the z32 maf the in and out should be 2in 5 out. if im not mistakin. tha usualy wut i use and then just change the correction on the fuel from thr. depending on wut the a/f guage is doing. do u have a/f guage hooked up?? is the maf connected rite. try disconecting it and see if it starts up??

11-13-2009, 08:37 AM	#9
keefus16 Leaky Injector Join Date: Jul 2009 Location: Georgia Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	I will try that - I did set the SAFC2 to 2in 5out for hotwire - it seems to run for a second with that setting but then cut off - do you think the ECU could be the issue? - I am just curious -

11-13-2009, 09:16 AM	#10
s13_sr20det Join Date: Dec 2007 Location: Elizabeth Posts: 48 Trader Rating: (1) Feedback Score: 1 reviews	its supposed to be 2in 6 out. thats how i have it setup with my safc2 and works fine.

11-13-2009, 12:45 PM	#12
keefus16 Leaky Injector Join Date: Jul 2009 Location: Georgia Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	Yes I do but I dont have a wideband - i know i need one but I dont have the cash at the moment - the guage is showing rich - im just trying to make sure the ECU isn't the issue - b/c i want to take it and get it dyno tuned

11-14-2009, 01:48 PM	#14
ericb382 Zilvia Member Join Date: Oct 2005 Location: Mesa, Az Posts: 293 Trader Rating: (4) Feedback Score: 4 reviews	I have never used an safc but from how i understand it, it modifies the input signal from the maf, thus changing both fuel and ignition. If you're "tricking" the ecu into thinking there's less air, this could be dangerous tuning using just a wideband, because you will end up advancing the timing where it may/will be dangerous. I agree with you that "dyno tuning" with an safc is a waste. The $ spent on "dyno tuning" would be better spent just getting a rom tune. Or you could buy a programable daughter board with that $, and sell the safc to partially pay for real dyno tuning. Do it right instead of trying to band-aid with an safc.