Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 24th January 2011, 14:58   #226
Distinguished - BHPian
 
dhanushs's Avatar
 
Join Date: Oct 2009
Location: Bathery/BLR
Posts: 3,386
Thanked: 3,867 Times
Default Re: Zen and the art of maintaining it

Quote:
Originally Posted by blackfire_9 View Post

Upon showing this to MASS, it was identified as some problem with a part which if I remember correctly was called the butterfly valve.
Isnt that the throttle valve?

Quote:
Originally Posted by Hashim View Post
High idling is related to sensor malfunctioning in MPFI.
Yes, the ECU is giving out more fuel than required to compensate 'some error' . What could that be?. 1. More air?. 2. More load?.

Quote:
Originally Posted by Hashim View Post
Have you tried reducing idling by setting it via accelerator cable adjuster screw?
Does MPFI's have a accelerator cable adjuster screw?. If so where?
dhanushs is offline   Reply With Quote
Old 25th January 2011, 21:28   #227
Senior - BHPian
 
blackfire_9's Avatar
 
Join Date: Nov 2009
Location: India
Posts: 1,075
Thanked: 186 Times
Default Re: Zen and the art of maintaining it

Quote:
Originally Posted by dhanushs View Post
Isnt that the throttle valve?
Not sure mate, maybe some body else can clarify this.

Drive safe.
blackfire_9 is offline   Reply With Quote
Old 25th January 2011, 22:31   #228
BHPian
 
im_srini's Avatar
 
Join Date: Sep 2006
Location: Portland
Posts: 917
Thanked: 297 Times
Post Re: Zen and the art of maintaining it

Quote:
Originally Posted by blackfire_9 View Post
It was identified as some problem with a part which if I remember correctly was called the butterfly valve. I might be wrong, but then I was suggested that it is this part that needs cleaning. However, I was warned that once they open it, it might get damaged while cleaning & then I would have to buy a new one.
I think your M-A-S-S was referring to the IACV, or idle-air-control-valve, its basically a stepper-motor driven valve that sits underneath the throttle-body (in the Alto).

Quote:
Originally Posted by dhanushs View Post
Does MPFI's have a accelerator cable adjuster screw?. If so where?
Yes, the Alto's throttle-body does have a screw for adjustment - the accelerator cable wraps around a plastic semi-circle which has a protruding tab on its underside, this tab rests against the adjustment screw which acts as a stop (backing the screw out reduces idle RPM).

Name:  TB_Alto_3.JPG
Views: 6010
Size:  40.3 KB

Note however that the ECU would itself try to adjust the idle RPM, so fiddling with the idle screw alone doesn't guarantee resolution of idle-speed issues.
im_srini is offline   Reply With Quote
Old 27th January 2011, 01:00   #229
BHPian
 
Tazzy Boy's Avatar
 
Join Date: Mar 2008
Location: Bangalore
Posts: 63
Thanked: 6 Times
Default Re: Zen and the art of maintaining it

Hi All

I have a 99 carb zen ran 43k, have been facing an issue for quite sometime, when i start the car in the morning the car starts but is very sluggish till the temp comes to the optimum point. Once the temp has come up then everything is fine no issues at all.

Same is observed after you park the car for more than 5hrs or so the same sluggishness even if you floor the pedal its slow till the temp comes up.

Showed at MASS left it there of a day they could find out what the issue was, suspecting a carb issue i had serviced the carb no luck, Checked the tappets all good, battery good, all wires good, spark plugs good. Not able to understand why this happens.

Noted a small oil leak from the distributor section, i think the O ring is gone and needs replacement. Could this be the culprit.

Team please do let me know what could be the reason as am out of ideas
Tazzy Boy is offline   Reply With Quote
Old 27th January 2011, 01:36   #230
BHPian
 
jatinpatel's Avatar
 
Join Date: Jun 2010
Location: Mumbai
Posts: 610
Thanked: 191 Times
Default Re: Zen and the art of maintaining it

Hey All,

I had few Questions regarding an 2002 Zen Lxi

1.were 02 models mpfi or carbs?
2. they came with 12" or 13"rims?

P.S- Its my friends car and i have to do it up for him so wanna plan things well in advance so needed answers for the same.
jatinpatel is offline   Reply With Quote
Old 27th January 2011, 04:50   #231
BHPian
 
rejoycjohn's Avatar
 
Join Date: Mar 2007
Location: Bangalore / Calicut
Posts: 438
Thanked: 665 Times
Default Re: Zen and the art of maintaining it

Quote:
Hey All,

I had few Questions regarding an 2002 Zen Lxi

1.were 02 models mpfi or carbs?
2. they came with 12" or 13"rims?

P.S- Its my friends car and i have to do it up for him so wanna plan things well in advance so needed answers for the same.
@ Jatin,

With the best of the information that I have , in 2002 , BS 2 was made mandatory and Maruti only sold MPFI engines .
So 2002 Zen should be a MPFI engine .

from 1993 to 1999 the zen had 13" wheels
From 2000- till they stopped production , the wheels were 12"s .

Hope this helps
rejoycjohn is offline   Reply With Quote
Old 27th January 2011, 17:46   #232
Distinguished - BHPian
 
dhanushs's Avatar
 
Join Date: Oct 2009
Location: Bathery/BLR
Posts: 3,386
Thanked: 3,867 Times
Default Re: Zen and the art of maintaining it

Quote:
Originally Posted by im_srini View Post
I think your M-A-S-S was referring to the IACV, or idle-air-control-valve, its basically a stepper-motor driven valve that sits underneath the throttle-body (in the Alto).
Thanks for the clarification buddy. May be it is causing more air in, and hence ECU injecting more fuel, and hence high idling?

Quote:
Originally Posted by im_srini View Post
Yes, the Alto's throttle-body does have a screw for adjustment - the accelerator cable wraps around a plastic semi-circle which has a protruding tab on its underside, this tab rests against the adjustment screw which acts as a stop (backing the screw out reduces idle RPM).
Um.. what exactly does this screw adjust?. Air, Fuel, or Air Fuel ratio?. However, will give it a try.
dhanushs is offline   Reply With Quote
Old 28th January 2011, 01:06   #233
BHPian
 
Hashim's Avatar
 
Join Date: Oct 2008
Location: Aligarh
Posts: 443
Thanked: 32 Times
Default Re: Zen and the art of maintaining it

Quote:
Originally Posted by Tazzy Boy View Post
Hi All

I have a 99 carb zen ran 43k, have been facing an issue for quite sometime, when i start the car in the morning the car starts but is very sluggish till the temp comes to the optimum point. Once the temp has come up then everything is fine no issues at all.

Same is observed after you park the car for more than 5hrs or so the same sluggishness even if you floor the pedal its slow till the temp comes up.

Showed at MASS left it there of a day they could find out what the issue was, suspecting a carb issue i had serviced the carb no luck, Checked the tappets all good, battery good, all wires good, spark plugs good. Not able to understand why this happens.

Noted a small oil leak from the distributor section, i think the O ring is gone and needs replacement. Could this be the culprit.

Team please do let me know what could be the reason as am out of ideas
Leak from distributor? AFAIK the only thing that can leak inside distributor is the small condenser so just open the distributor cap and check for dampness there on condenser body. When you have open it, also check for any sideways play in the rotor shaft.

I suggest you get the ignition system throughly checked and serviced. Parts to look closely for fitness are:
- Ignition coil
- Plug HT chords (check with multimeter, resistance should not be more than - 15 ohms)
- Distributor
- spark plugs (change if they are old, I suggest Mico Bosch W8DC)
Hashim is offline   Reply With Quote
Old 28th January 2011, 14:02   #234
BHPian
 
scorpian's Avatar
 
Join Date: Jun 2008
Location: GOA
Posts: 249
Thanked: 92 Times
Default Re: Zen and the art of maintaining it

@tazzyboy

Symtoms u have written suggest a faulty ignition timing,a retarted timing will cause the engine to be very sluggish until it heats up to certain level, i would suggest to check the timing and set it as per manual.

My 02 zen faced a similar problem and its only when the timing was checked it was found to be retarded my MASS to solve a knocking problem...
scorpian is offline   Reply With Quote
Old 28th January 2011, 22:50   #235
Senior - BHPian
 
blackfire_9's Avatar
 
Join Date: Nov 2009
Location: India
Posts: 1,075
Thanked: 186 Times
Default Re: Zen and the art of maintaining it

Quote:
Originally Posted by im_srini View Post
I think your M-A-S-S was referring to the IACV, or idle-air-control-valve, its basically a stepper-motor driven valve that sits underneath the throttle-body (in the Alto).

Note however that the ECU would itself try to adjust the idle RPM, so fiddling with the idle screw alone doesn't guarantee resolution of idle-speed issues.
hey mate, it could be the part you have suggested, but not sure. However, what's a stepper motor, pardon my ignorance if it's a commonly known component.

Lastly, as somebody else also asked, what can be expected out of this idle adjustment screw in terms of functionality because what as you have correctly said, the ECU would do it's job of keeping the rpms correct by possibly modifying some other parameters.

Drive safe.
blackfire_9 is offline   Reply With Quote
Old 9th February 2011, 18:39   #236
BHPian
 
Zen2001's Avatar
 
Join Date: Oct 2009
Location: Pune
Posts: 237
Thanked: 17 Times
Default Service update @10 years and 140000km

The ever faithful Zen is 10. If school geography serves me right, she has covered almost half of the globe's circumference @ the equator. No fuss. Make half of that on LPG. Recently did 120 on a short stretch of the old Bombay Poona highway (on petrol of course). No fuss.
On the same road yesterday, a Tata Sumo maniac overtakes from the left, cuts in front and brakes!! Blind bat didn't see I was behind a towing vehicle. I brake in panic waiting to hear the noise, but all I hear is the screech of rubber on tar. Maybe my heart was doing 120, but the car, NO FUSS. Thank God there was no one behind me!! (I've had that experience a little too much)

Back to the service -

Engine oil, oil & fuel filter, spark plugs, brake pads, radiator cap & fuel pump to carb hose - were replaced. The last one probably as I was experiencing cold start problems/jerks.

Labour included servicing, W/A + W/B & tyre rotation and brake related works.

Total bill - 2700

Got a new car perfume - not only does the car feel smooth-new, it smells new too!
Zen2001 is offline   Reply With Quote
Old 9th February 2011, 19:30   #237
BHPian
 
Join Date: May 2006
Location: Nagpur
Posts: 183
Thanked: 12 Times
Default Zen VXi - 5 years and 53,000 kms

My Zen just came back from service today. Had to change the Clutch as it was slipping. The AC compressor too has become weak in its pumping action. For now just had the refrigerant gas recharged, and it is cooling well now. Lets see if it lasts me for this summer, or leaks out.

Apart from the regular oil changes, injector cleaning and servicing, I had to change the boot door balancer rods, as the old ones could not hold the boot open and it used to drop down on its own.

The Clutch set for the old Zen VXi was Rs. 1987/- only
The rear boot door balancer rods were Rs. 364/- each.
AC gas recharging was Rs 900/-

I had the tyres changed at 52,000 kms. Got all 5 Michelin XM1+ tubeless tyres from MHKS Tyre Division on Kamptee Road, Nagpur. Paid Rs. 2250/- for each tyre, which is quite reasonable I think. The wheels were balanced and aligned at the same time.The ride quality of the Michelins is amazing! Very quiet and good grip.
newcoolgadgets is offline   Reply With Quote
Old 9th February 2011, 21:43   #238
BANNED
 
Join Date: Nov 2008
Location: New Delhi
Posts: 672
Thanked: 121 Times
Default Re: Zen and the art of maintaining it

In my Zen mpfi 2002 I am having idling issues(uneven idling ) since past few weeks. I have already checked spark plugs, fuel , air filter, petrol filter .

Can someone please help in noting down what all may cause uneven idling (It will go up and down).
Trust_In_Thrust is offline   Reply With Quote
Old 10th February 2011, 14:30   #239
BANNED
 
Join Date: Nov 2008
Location: New Delhi
Posts: 672
Thanked: 121 Times
Default Re: Zen and the art of maintaining it

I solved the problem .There is a sensor in throttle body in in which there is a bearing and it was not free so cleaned it up and no idle rpm fluctuations now .

By the way MASS asked for some 5000/- for sorting the issue which involved changing few sensor , ht cable , spark plugs etc. Thank god they did not ask to change the car .I wonder what is the use of so many MASS when they are so incompetent.
Trust_In_Thrust is offline   (1) Thanks Reply With Quote
Old 10th February 2011, 14:46   #240
Senior - BHPian
 
libranof1987's Avatar
 
Join Date: Sep 2010
Location: All over!
Posts: 3,426
Thanked: 2,229 Times
Default Re: Zen and the art of maintaining it

Quote:
Originally Posted by Trust_In_Thrust View Post
I solved the problem .There is a sensor in throttle body in in which there is a bearing and it was not free so cleaned it up and no idle rpm fluctuations now .

By the way MASS asked for some 5000/- for sorting the issue which involved changing few sensor , ht cable , spark plugs etc. Thank god they did not ask to change the car .I wonder what is the use of so many MASS when they are so incompetent.
They are not incompetent.

They believe in if-there-is-a-problem->replace-everything-around-it rather than diagnose and repair.
libranof1987 is offline   (1) Thanks Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Buying, Owning, Driving and Maintaining a car in North America vivekiny2k The International Automotive Scene 5800 27th May 2017 01:27
Sunbeam Rapier Series 1 - Advice on Restoring and Maintaining Jehan-Sam Post-War 74 25th November 2015 08:45
Zen and the Art of Buying your First Car the_trooper Test-Drives & Initial Ownership Reports 30 21st March 2013 18:16
Cleaning and Maintaining Head Units souravbasu In-Car Entertainment 43 13th November 2009 23:21


All times are GMT +5.5. The time now is 02:44.

Copyright ©2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks