Anyone Ever have an Idol Problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

knghtryde · 12-30-2003, 11:11 AM

My car is idoling at 1200rpms. I've checked the timing and the timing is right on the money. The Idol control Valve is set as low as it goes. The throtle cable is as loose as I can get it. The TPS sensor is set as low as I can go yet the car refuses to idol anything less than 1200rpms.

If anyone has any idea of what the problem can be please let me know so that I can try everything. I will try anything and everything to get his car to work.

The car is running great and perfectly smooth. The car doesn't have any thing wrong with it except for the high Idol.

This idol problem is the reason I have not been able to smog my car.

Oh I have checked the compression. it's at 180 in each cylinder. They are all exactly 180 and I even checked with 3 different testers.

Like I said, any and all ideas welcome at this point.

aeontony · 12-30-2003, 12:06 PM

idle

It sounds like you could have a vaccum leak somewhere..it's especially suspect on turbo cars with all the extra plumbing. Is the idle rock steady? Does your car exhibit stuttering/idle drop/other strange symptoms?

knghtryde · 12-30-2003, 01:26 PM

It's usually steady a 1200rpm, but every now and then it goes up to about 1500rpm but it never drops below 1200 rpm.

Another thing. My check engine lite just came on when I went to lunch.

aeontony · 12-30-2003, 05:50 PM

Spray some carb cleaner around the lines and see if you see bubbling..or maybe even just one outright unplugged.

As for the check engine light...I can venture a guess and suggest you replace the O2 sensor, but not until you find out what code the computer's throwing at you will you quite know what it's complaining about..even then it may be another item that's causing the malfunction. Doh. These things are a pain.

knghtryde · 12-31-2003, 09:33 AM

It's a brand new o2 sensor. Checked the Check engine light code. It's a code 32... The EGR function. The problem is that it doesn't clarify what part of the EGR funciton. Should I just change everything associated with the EGR valve. I have an extra intake manifold that has everything still attached. And I have all the gaskets. Cause I just rebuilt the block and ordered the entire rebuild kit.

**mrmephistopheles** · 12-31-2003, 09:40 AM

nope. everyone idolizes me as they should.

check your vacuum lines by your EGR valve (back of intake manifold)
i bet a shiny penny that at least one of them is rotted/torn through.

knghtryde · 12-31-2003, 09:57 AM

Nope did that the second that I found the code, all of the hoses that are there are in perfect condition, and just to be safe I went and bought more and replaced them all. They are all brand new.

97DubTruck · 12-31-2003, 07:52 PM

i'm just throwing this out there. maybe clean your throttle body with degreaser. there is a write up about it at 240sx.org under FAQ. might solve the idle problems. i did it yesterday with a friend on his 95. when he pressed in the clutch the engine would surge a little and make it idle a little higher for a while. getting all the carbon out solved it.

knghtryde · 01-02-2004, 09:06 AM

Thanks for the imput guys. I finally figured it out. It was the secondary EGR valve. The one that controls the vacum that goes to the EGR valve. It was also the Air Control Valve.

After replacing both of those the engine runs smoothly and the check engine lite went away.

12-30-2003, 11:11 AM	#1
knghtryde Zilvia Addict Join Date: Sep 2003 Location: From San Jose, CA now Springfield, MO Age: 45 Posts: 787 Trader Rating: (0) Feedback Score: 0 reviews	Anyone Ever have an Idol Problem My car is idoling at 1200rpms. I've checked the timing and the timing is right on the money. The Idol control Valve is set as low as it goes. The throtle cable is as loose as I can get it. The TPS sensor is set as low as I can go yet the car refuses to idol anything less than 1200rpms. If anyone has any idea of what the problem can be please let me know so that I can try everything. I will try anything and everything to get his car to work. The car is running great and perfectly smooth. The car doesn't have any thing wrong with it except for the high Idol. This idol problem is the reason I have not been able to smog my car. Oh I have checked the compression. it's at 180 in each cylinder. They are all exactly 180 and I even checked with 3 different testers. Like I said, any and all ideas welcome at this point. __________________ David Munoz, 1989 S13 KA24ET 1990 Infiniti Q45 To push oneself to the limit is all that one can do. To quit is to die.

12-30-2003, 12:06 PM	#2
aeontony Zilvia Junkie Join Date: Jan 2003 Location: Norcal Posts: 303 Trader Rating: (0) Feedback Score: 0 reviews	idle It sounds like you could have a vaccum leak somewhere..it's especially suspect on turbo cars with all the extra plumbing. Is the idle rock steady? Does your car exhibit stuttering/idle drop/other strange symptoms? __________________ S14.5 for sale. Must move on with life...=( http://www.zilvia.net/f/showthread.php?t=56822 Au no wa wakare no hajime...

12-30-2003, 01:26 PM	#3
knghtryde Zilvia Addict Join Date: Sep 2003 Location: From San Jose, CA now Springfield, MO Age: 45 Posts: 787 Trader Rating: (0) Feedback Score: 0 reviews	It's usually steady a 1200rpm, but every now and then it goes up to about 1500rpm but it never drops below 1200 rpm. Another thing. My check engine lite just came on when I went to lunch. __________________ David Munoz, 1989 S13 KA24ET 1990 Infiniti Q45 To push oneself to the limit is all that one can do. To quit is to die.

12-30-2003, 05:50 PM	#4
aeontony Zilvia Junkie Join Date: Jan 2003 Location: Norcal Posts: 303 Trader Rating: (0) Feedback Score: 0 reviews	Spray some carb cleaner around the lines and see if you see bubbling..or maybe even just one outright unplugged. As for the check engine light...I can venture a guess and suggest you replace the O2 sensor, but not until you find out what code the computer's throwing at you will you quite know what it's complaining about..even then it may be another item that's causing the malfunction. Doh. These things are a pain. __________________ S14.5 for sale. Must move on with life...=( http://www.zilvia.net/f/showthread.php?t=56822 Au no wa wakare no hajime...

12-31-2003, 09:33 AM	#5
knghtryde Zilvia Addict Join Date: Sep 2003 Location: From San Jose, CA now Springfield, MO Age: 45 Posts: 787 Trader Rating: (0) Feedback Score: 0 reviews	It's a brand new o2 sensor. Checked the Check engine light code. It's a code 32... The EGR function. The problem is that it doesn't clarify what part of the EGR funciton. Should I just change everything associated with the EGR valve. I have an extra intake manifold that has everything still attached. And I have all the gaskets. Cause I just rebuilt the block and ordered the entire rebuild kit. __________________ David Munoz, 1989 S13 KA24ET 1990 Infiniti Q45 To push oneself to the limit is all that one can do. To quit is to die.

12-31-2003, 09:40 AM	#6
mrmephistopheles Magnanimous Justice Distribution Service Join Date: Mar 2002 Location: BFE Age: 23 Posts: 14,372 Trader Rating: (9) Rides Gallery: mrmephistopheles Feedback Score: 9 reviews	nope. everyone idolizes me as they should. check your vacuum lines by your EGR valve (back of intake manifold) i bet a shiny penny that at least one of them is rotted/torn through.

12-31-2003, 09:57 AM	#7
knghtryde Zilvia Addict Join Date: Sep 2003 Location: From San Jose, CA now Springfield, MO Age: 45 Posts: 787 Trader Rating: (0) Feedback Score: 0 reviews	Nope did that the second that I found the code, all of the hoses that are there are in perfect condition, and just to be safe I went and bought more and replaced them all. They are all brand new. __________________ David Munoz, 1989 S13 KA24ET 1990 Infiniti Q45 To push oneself to the limit is all that one can do. To quit is to die.

12-31-2003, 07:52 PM	#8
97DubTruck Zilvia Junkie Join Date: Sep 2003 Location: location, location Posts: 532 Trader Rating: (0) Feedback Score: 0 reviews	i'm just throwing this out there. maybe clean your throttle body with degreaser. there is a write up about it at 240sx.org under FAQ. might solve the idle problems. i did it yesterday with a friend on his 95. when he pressed in the clutch the engine would surge a little and make it idle a little higher for a while. getting all the carbon out solved it.

01-02-2004, 09:06 AM	#9
knghtryde Zilvia Addict Join Date: Sep 2003 Location: From San Jose, CA now Springfield, MO Age: 45 Posts: 787 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for the imput guys. I finally figured it out. It was the secondary EGR valve. The one that controls the vacum that goes to the EGR valve. It was also the Air Control Valve. After replacing both of those the engine runs smoothly and the check engine lite went away. __________________ David Munoz, 1989 S13 KA24ET 1990 Infiniti Q45 To push oneself to the limit is all that one can do. To quit is to die.