Stalling out problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Murda656 · 01-19-2015, 05:32 PM

I have a 1990 Soch 240sx and it stalls out on me randomly or won't start!
Both probs are intermittent, sometimes starts right up, other times takes a cpl min of pumping the gas to get it going.
The stalling out prob, I can b idling or shifting gears, when I give it has the rpms drop instead of increase. At idle in first sometimes gotta feather the gas to get pass the rpms droping!
No chk engine light, replaced battery, plugs, wires, cap, rotor, fuel filter, and MAF sensor is clean! Anyone come across this prob or have advice for me?
Thanks

Fuego · 01-19-2015, 07:37 PM

Vac leak.......................

bmaddock · 01-19-2015, 07:51 PM

Although you might not have a check engine light, read the codes that might be on your ECU. Take off the passenger kick panel, unbolt the ECU, and turn the car to the ON position. Using a flathead screwdriver, spin the knob on the back of the ECU fully clockwise, then counterclockwise back to it's original position. The LED will flash two numbers. The first number is given in slow blinks, the second in fast blinks.

You can then google the codes. To reset the ECU, turn the car on then from the ON position. Be careful and make sure you've discharged yourself before touching the ECU, static electricity can burn up circuits. Good luck!

I'm leaning towards MAF is going out but it could easily be a vacuum leak, likely a large one on that. You can test that with a vacuum or boost gauge.

S-Verteen · 01-19-2015, 08:33 PM

When the car stalls and you try to refire are you getting spark or are the injectors following fuel? I am also curious if there's good fuel pressure after the stall.

Murda656 · 01-21-2015, 07:25 PM

All great ?s that I don't know the answer to
I'm usually on my way somewhere when it happens!
Trying to crank it off I smell fuel like I'm flooding it, but won't start of I don't pump the gas, and when it does start it bogs down like it's trying to burn off the ecessive fuel

robinsone · 01-21-2015, 09:17 PM

Clean and check your air idle control valve sounds like yours is either clogged or bad

Murda656 · 01-21-2015, 10:38 PM

Ok I'll check and let u know
Thank u

Murda656 · 01-21-2015, 10:50 PM

Gonna chk in morning
But if that was the case wouldn't it idle rough or something like that?

01-19-2015, 05:32 PM	#1
Murda656 Join Date: May 2010 Location: Sonora Age: 35 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	Stalling out problem I have a 1990 Soch 240sx and it stalls out on me randomly or won't start! Both probs are intermittent, sometimes starts right up, other times takes a cpl min of pumping the gas to get it going. The stalling out prob, I can b idling or shifting gears, when I give it has the rpms drop instead of increase. At idle in first sometimes gotta feather the gas to get pass the rpms droping! No chk engine light, replaced battery, plugs, wires, cap, rotor, fuel filter, and MAF sensor is clean! Anyone come across this prob or have advice for me? Thanks

01-19-2015, 07:37 PM	#2
Fuego Zilvia Addict Join Date: Nov 2011 Location: Las Vegas Age: 31 Posts: 629 Trader Rating: (0) Feedback Score: 0 reviews	Vac leak....................... __________________

01-19-2015, 07:51 PM	#3
bmaddock Zilvia Junkie Join Date: Sep 2011 Location: Richmond Posts: 506 Trader Rating: (1) Feedback Score: 1 reviews	Although you might not have a check engine light, read the codes that might be on your ECU. Take off the passenger kick panel, unbolt the ECU, and turn the car to the ON position. Using a flathead screwdriver, spin the knob on the back of the ECU fully clockwise, then counterclockwise back to it's original position. The LED will flash two numbers. The first number is given in slow blinks, the second in fast blinks. You can then google the codes. To reset the ECU, turn the car on then from the ON position. Be careful and make sure you've discharged yourself before touching the ECU, static electricity can burn up circuits. Good luck! I'm leaning towards MAF is going out but it could easily be a vacuum leak, likely a large one on that. You can test that with a vacuum or boost gauge. __________________

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01-19-2015, 08:33 PM	#4
S-Verteen Leaky Injector Join Date: Jun 2013 Location: Quad Cities Posts: 96 Trader Rating: (0) Feedback Score: 0 reviews	When the car stalls and you try to refire are you getting spark or are the injectors following fuel? I am also curious if there's good fuel pressure after the stall.

01-21-2015, 07:25 PM	#5
Murda656 Join Date: May 2010 Location: Sonora Age: 35 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	All great ?s that I don't know the answer to I'm usually on my way somewhere when it happens! Trying to crank it off I smell fuel like I'm flooding it, but won't start of I don't pump the gas, and when it does start it bogs down like it's trying to burn off the ecessive fuel

01-21-2015, 09:17 PM	#6
robinsone Leaky Injector Join Date: Oct 2009 Location: Chicago, IL Age: 42 Posts: 129 Trader Rating: (8) Feedback Score: 8 reviews	Clean and check your air idle control valve sounds like yours is either clogged or bad

01-21-2015, 10:38 PM	#7
Murda656 Join Date: May 2010 Location: Sonora Age: 35 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	Ok I'll check and let u know Thank u

01-21-2015, 10:50 PM	#8
Murda656 Join Date: May 2010 Location: Sonora Age: 35 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	Gonna chk in morning But if that was the case wouldn't it idle rough or something like that?