KA surges then idles at 1500 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

LA_phantom_240 · 07-06-2008, 09:57 PM

Still can't get my friend's s13 running right. made sure the TPS was set right, and it surges between 1500 and 2200 rpm, and eventually settles down to 1500rpm even after warming up. Pinched IACV hose shut, and didn't change anything. I'm thinking a vacuum leak, but he swears up and down he connected everything right. Any ideas?

Saviorsoul · 07-07-2008, 10:18 AM

bump. I fucking hate my KA

awesomenick · 07-07-2008, 10:53 AM

I'd double check the vacuum hoses. Maybe hook up a vacuum gauge and see what it reads. Have you cleaned out the IACV anyways, to see if it helped at all?

awesomenick · 07-07-2008, 10:55 AM

Oh yeah. You could have a bad ECU coolant temp sensor too.

sillyvia13 · 07-07-2008, 11:16 AM

vac leak. all day. I think...lol....
check in rear the diapragm? the line always hits the lip pf firewall...it on lower side a 1/4 line?
gl.

LA_phantom_240 · 07-07-2008, 05:01 PM

Well we thought maybe the IACV was the culprit, so we swapped the entire lower section of the manifold with new gaskets (from the motor I'm going to drop in my car), and still nothing. I thought it was the CTS as well, but he told me his was brand new.

awesomenick · 07-09-2008, 12:35 PM

Hmmm. Try the coolant temp sensor for the ECU maybe. Those things do crazy things to KA's. They can mess with your idle, fuel economy, and your soul.

LA_phantom_240 · 07-09-2008, 07:32 PM

Quote:

Originally Posted by awesomenick

Hmmm. Try the coolant temp sensor for the ECU maybe. Those things do crazy things to KA's. They can mess with your idle, fuel economy, and your soul.

Its new. I honestly can't figure this thing out. Would the A/C compressor turn-on lead not being connected have anything to do with it?

awesomenick · 07-09-2008, 07:55 PM

I don't think that would affect it. My car idles fine without the a/c stuff in there, and I just left it all unplugged. Hmm. I'm kind of at a loss too. If I think of something I'll post for sure.

LA_phantom_240 · 07-09-2008, 08:39 PM

I'm at a 100% loss for ideas here. I'm seriously about to dig through my boxes of shit and find one of my old s13 ecu's and see if maybe the ECU is shot somehow.

awesomenick · 07-09-2008, 08:59 PM

http://zilvia.net/f/showthread.php?t=190745

Maybe?

LA_phantom_240 · 07-09-2008, 09:20 PM

That's really odd... well it won't hurt to try.

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07-07-2008, 10:18 AM	#2
Saviorsoul Leaky Injector Join Date: Jan 2008 Location: Slidell, Louisiana Posts: 96 Trader Rating: (0) Feedback Score: 0 reviews	bump. I fucking hate my KA

07-07-2008, 10:53 AM	#3
awesomenick Zilvia Addict Join Date: May 2006 Location: UT Age: 36 Posts: 945 Trader Rating: (33) Feedback Score: 33 reviews	I'd double check the vacuum hoses. Maybe hook up a vacuum gauge and see what it reads. Have you cleaned out the IACV anyways, to see if it helped at all?

07-07-2008, 10:55 AM	#4
awesomenick Zilvia Addict Join Date: May 2006 Location: UT Age: 36 Posts: 945 Trader Rating: (33) Feedback Score: 33 reviews	Oh yeah. You could have a bad ECU coolant temp sensor too.

07-07-2008, 11:16 AM	#5
sillyvia13 BANNED Join Date: Jan 2006 Location: nh Posts: 1,645 Trader Rating: (1) Feedback Score: 1 reviews	vac leak. all day. I think...lol.... check in rear the diapragm? the line always hits the lip pf firewall...it on lower side a 1/4 line? gl.

07-09-2008, 12:35 PM	#7
awesomenick Zilvia Addict Join Date: May 2006 Location: UT Age: 36 Posts: 945 Trader Rating: (33) Feedback Score: 33 reviews	Hmmm. Try the coolant temp sensor for the ECU maybe. Those things do crazy things to KA's. They can mess with your idle, fuel economy, and your soul.

07-09-2008, 07:55 PM	#9
awesomenick Zilvia Addict Join Date: May 2006 Location: UT Age: 36 Posts: 945 Trader Rating: (33) Feedback Score: 33 reviews	I don't think that would affect it. My car idles fine without the a/c stuff in there, and I just left it all unplugged. Hmm. I'm kind of at a loss too. If I think of something I'll post for sure.

07-09-2008, 08:59 PM	#11
awesomenick Zilvia Addict Join Date: May 2006 Location: UT Age: 36 Posts: 945 Trader Rating: (33) Feedback Score: 33 reviews	http://zilvia.net/f/showthread.php?t=190745 Maybe?