S13 Sohc...not holding idle. **Vid inside** - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

CantSTOP · 11-21-2011, 03:32 PM

So I'm pretty much stumped and fed up now T_T Posted in the ask question thread before...

So I was checking the coolant temp sensor(CTS), and the plug was fcuked up! So I bought a new sensor anyways. Installed it, The car would stay on for more than 5secs now but eventually drop idle and die. But heres the weird part now...when I unplug the CT harness from the sensor the car stays on, rough-to-ok idle. Now when I step on the brake pedal, idle drops and if I keep pumping the brakes the car will die. So do I have a vacuum leak? or bad brake booster?

And I don't know if it's another cause to my problem but I do have a leak from the header. Missing like 3 bolts T_T car came like that. That would cause me running rich? but would it cause the car to die/stall?

Someone said check the vac lines to the egr.

http://s165.photobucket.com/albums/u73/KaytotheTee26/?action=view¤t=MOV001.mp4

Remember I have a header leak lulz >.>

And I found that...the part I circle was not connected. So bought new vac lines for that sensor. Car still acts the same q__q

Already changed...stock intake/MAF, CTS, and the little vac lines.

Car is an auto SOHC

CantSTOP · 11-27-2011, 07:13 PM

Anyone!??!

starplatnumm · 11-27-2011, 08:07 PM

had a similar issue. i checked my compression and the first three cylinders where around PS to 80. also spun out bearings due to lack of lubrication. kinda like the Supra's 5Mge-7Mge issue when you startup your car you have wait for a while due to low oil pump pressure. i took my car to swap the engine to the SR. Kept the Ka SOHC. i took the single cam apart. sure enough could been that the previous owner used High Mileage oil to regular. high mileage oil has a additive that swells up your head seals or any rubber based gaskets so u have to continue using it on every oil change. i always use synthetic blends. so by changing oil types i believed that it is time to rebuild. just what i experience on 1990 Fastback Manual

rcdad123 · 11-28-2011, 12:57 AM

disconnect the hose from the brake booster to the intake manifold. plug the pipe on the manifold and see if the engine runs fine. if it does, then you might have a leaking brake booster. if there are no changes, booster is ok. the problem is somewhere else. if you unplugged the coolant temp sensor, the engine should run rich. if the engine runs better with it unplug, you might have a vacuum leak. also, fix the exhaust leak first. the video sounds like a spark plug came off. check an make sure the plugs are tight.

11-21-2011, 03:32 PM	#1
CantSTOP Zilvia Junkie Join Date: Aug 2006 Location: Soo-Cali(661) Age: 32 Posts: 590 Trader Rating: (12) Feedback Score: 12 reviews	S13 Sohc...not holding idle. Vid inside So I'm pretty much stumped and fed up now T_T Posted in the ask question thread before... So I was checking the coolant temp sensor(CTS), and the plug was fcuked up! So I bought a new sensor anyways. Installed it, The car would stay on for more than 5secs now but eventually drop idle and die. But heres the weird part now...when I unplug the CT harness from the sensor the car stays on, rough-to-ok idle. Now when I step on the brake pedal, idle drops and if I keep pumping the brakes the car will die. So do I have a vacuum leak? or bad brake booster? And I don't know if it's another cause to my problem but I do have a leak from the header. Missing like 3 bolts T_T car came like that. That would cause me running rich? but would it cause the car to die/stall? Someone said check the vac lines to the egr. http://s165.photobucket.com/albums/u73/KaytotheTee26/?action=view¤t=MOV001.mp4 Remember I have a header leak lulz >.> And I found that...the part I circle was not connected. So bought new vac lines for that sensor. Car still acts the same q__q Already changed...stock intake/MAF, CTS, and the little vac lines. Car is an auto SOHC __________________ HI HATERS! from the left to the right

11-27-2011, 07:13 PM	#2
CantSTOP Zilvia Junkie Join Date: Aug 2006 Location: Soo-Cali(661) Age: 32 Posts: 590 Trader Rating: (12) Feedback Score: 12 reviews	Anyone!??! __________________ HI HATERS! from the left to the right

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11-27-2011, 08:07 PM	#3
starplatnumm Leaky Injector Join Date: Apr 2010 Location: Los Angeles. CA Age: 36 Posts: 132 Trader Rating: (5) Feedback Score: 5 reviews	had a similar issue. i checked my compression and the first three cylinders where around PS to 80. also spun out bearings due to lack of lubrication. kinda like the Supra's 5Mge-7Mge issue when you startup your car you have wait for a while due to low oil pump pressure. i took my car to swap the engine to the SR. Kept the Ka SOHC. i took the single cam apart. sure enough could been that the previous owner used High Mileage oil to regular. high mileage oil has a additive that swells up your head seals or any rubber based gaskets so u have to continue using it on every oil change. i always use synthetic blends. so by changing oil types i believed that it is time to rebuild. just what i experience on 1990 Fastback Manual

11-28-2011, 12:57 AM	#4
rcdad123 Zilvia Addict Join Date: Jul 2011 Location: san diego Posts: 639 Trader Rating: (0) Feedback Score: 0 reviews	disconnect the hose from the brake booster to the intake manifold. plug the pipe on the manifold and see if the engine runs fine. if it does, then you might have a leaking brake booster. if there are no changes, booster is ok. the problem is somewhere else. if you unplugged the coolant temp sensor, the engine should run rich. if the engine runs better with it unplug, you might have a vacuum leak. also, fix the exhaust leak first. the video sounds like a spark plug came off. check an make sure the plugs are tight.