Extremely High RPM at Idle after PCV Valve change

abhipuru16 · 28th March 2012, 10:53

Extremely High RPM after PCV Valve change

This was right after, I mean instantly after I changed the PCV valve and PCV valve seal in my Maruti Suzuki Zen 1L, 16V MPFi.

The car has done 130000 km. This was the first time its PCV valve was changed.

I even reset the ECU by disconnecting the battery negative for 30 seconds.
After that, it started fine with "kind of normal" idle but slowly after 10-15 seconds, the car again started acting up and started idling annoyingly high

vikram_d · 28th March 2012, 10:55

Quote:

Originally Posted by abhipuru16

Extremely High RPM after PCV Valve change

This was right after, I mean instantly after I changed the PCV valve and PCV valve seal in my Maruti Suzuki Zen 1L, 16V MPFi.

The car has done 130000 km. This was the first time its PCV valve was changed.

I even reset the ECU by disconnecting the battery negative for 30 seconds.
After that, it started fine with "kind of normal" idle but slowly after 10-15 seconds, the car again started acting up and started idling annoyingly high

Most likely a leak somewhere around the PCV valve area. This happened with me on my Esteem and turned out the hose had not been connected properly.

dhanushs · 28th March 2012, 13:16

^^ +1.

Most probably a leak somewhere in the crank case ventilation pipes. I had this issue in my IKON, and just like vikram, my hose too was disconnected. Plugging in solved the issue.

Does the Zen have an IAC valve? If so, faulty IAC could also be the issue.

abhijitl · 28th March 2012, 20:41

Check all vacuum connections. Check the throttle body. Is PCV valve connected properly?

abhipuru16 · 29th March 2012, 09:26

So sorry guys, actually there was something else that was changed too.
The small rubber cushions in the accelerator and clutch pedals that prevent the metal to metal contact and hence the sound. Because of this, the accelerator was a little depressed even after being stepped off from. I noticed that the revs came down if I pulled the pedal with the tip of my shoe.
I added the required play in the throttle cable and now everything works fine.

The idle is buttery smooth and there seems to be a perceptible difference in performance too with the car not being "visibly" bogged down on switching on the AC and is a joy to drive in afternoon heat as well with very good performance with the AC. I recommend you to keep a check on the PCV valve, it really gets clogged up pretty bad.

vikram_d · 29th March 2012, 11:01

Glad that you found the problem and it is now sorted. Enjoy the buttery smooth drive.

28th March 2012, 10:53	#1
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	Extremely High RPM at Idle after PCV Valve change Extremely High RPM after PCV Valve change This was right after, I mean instantly after I changed the PCV valve and PCV valve seal in my Maruti Suzuki Zen 1L, 16V MPFi. The car has done 130000 km. This was the first time its PCV valve was changed. I even reset the ECU by disconnecting the battery negative for 30 seconds. After that, it started fine with "kind of normal" idle but slowly after 10-15 seconds, the car again started acting up and started idling annoyingly high
	() Thanks

28th March 2012, 13:16	#3
dhanushs Distinguished - BHPian Join Date: Oct 2009 Location: Chennai Posts: 4,281 Thanked: 10,175 Times	Re: Extremely High RPM at Idle after PCV Valve change ^^ +1. Most probably a leak somewhere in the crank case ventilation pipes. I had this issue in my IKON, and just like vikram, my hose too was disconnected. Plugging in solved the issue. Does the Zen have an IAC valve? If so, faulty IAC could also be the issue.
	() Thanks

28th March 2012, 20:41	#4
abhijitl BHPian Join Date: Jan 2009 Location: Pune Posts: 51 Thanked: 16 Times	Re: Extremely High RPM at Idle after PCV Valve change Check all vacuum connections. Check the throttle body. Is PCV valve connected properly?
	(1) Thanks

29th March 2012, 09:26	#5
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	Re: Extremely High RPM at Idle after PCV Valve change So sorry guys, actually there was something else that was changed too. The small rubber cushions in the accelerator and clutch pedals that prevent the metal to metal contact and hence the sound. Because of this, the accelerator was a little depressed even after being stepped off from. I noticed that the revs came down if I pulled the pedal with the tip of my shoe. I added the required play in the throttle cable and now everything works fine. The idle is buttery smooth and there seems to be a perceptible difference in performance too with the car not being "visibly" bogged down on switching on the AC and is a joy to drive in afternoon heat as well with very good performance with the AC. I recommend you to keep a check on the PCV valve, it really gets clogged up pretty bad.
	(1) Thanks

29th March 2012, 11:01	#6
vikram_d Senior - BHPian Join Date: Jul 2006 Location: Bangalore Posts: 2,427 Thanked: 1,185 Times	Re: Extremely High RPM at Idle after PCV Valve change Glad that you found the problem and it is now sorted. Enjoy the buttery smooth drive.
	(1) Thanks