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Old 19th September 2009, 20:18   #16
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I agree, with what promod kumar said above. Its a case of detuning done sometime ago for Pollution check. archit, you can get carb tune-up for increase rpm by your preferred mechanic.But remember, after getting that idle -rpm problem fixed , your car may give less than 17 /KPL FE. Therefore, its better if you let it as it is, as some one said above. And , there is nothing wrong in starting the carb-engine in cold -start with a slight push of accelerator pedal , especially since you can retain that 17 /KPL FE.

AS for increasing the rpm, your local mechanic may put his hand under the carb, will do some tweaking with the butterfly valve which connects the accelerator pedal via a mechanical cable. And Your idle-rpm problem will go away, nonetheless at the expense of FE!
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Old 21st September 2009, 08:44   #17
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@archat68, I own a 2000 carb Zen. I faced the same prblem. As mentioned by SSTraveller, you are running a extra-lean mixture and the mileage you are getting is pretty awesome. I checked my Idling RPM and had my mechanic increase the idling RPM to 850. When you start for the first time in any day, tap the accelerator twice. This seemed to have worked for me. My mechanic mentioned that before switching off the engine, revv your engine once or twice and then turn off the engine. This ensures a smooth start the next day. I have fond it pretty useful and it worked like a charm. Hope this helps.. If you have found out any ther solution plese post it.
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Old 21st September 2009, 10:36   #18
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I've not checked it yet as the problems are minor and I don't have much time right now. Will post once I find any solution.
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Old 3rd February 2012, 11:06   #19
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Default Re: Starting and idling problem in Carb Zen

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I've not checked it yet as the problems are minor and I don't have much time right now. Will post once I find any solution.
I know it is an old thread, but any updates?, we have a 97 Zen which is not used much, used for small close by chores by my dad. We face the same problem.
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Old 3rd February 2012, 12:41   #20
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Default Re: Starting and idling problem in Carb Zen

Sorry buddy!! The Zen is not with me anymore. I sold her off about 10 month ago. Didn't find any solution. Everybody asked me to live with the problem since those were minor and I was getting good fuel economy.
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Old 15th March 2014, 16:19   #21
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Default Re: Starting and idling problem in Carb Zen

Bumping up this old thread.
My Zen carb stopped in the middle of the road yesterday. We had to push it aside and then do a push start in second gear after some effort.

Now the car is at my regular A.S.S. and after servicing they are not able to start the car.
I was informed that the fuel pump is the culprit and they will remove the motor and test.

The damage will be more than Rs. 5000.
What is the cost of the pump in after market?

Is there any other thing that might be wrong?
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Old 15th March 2014, 18:09   #22
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Default Re: Starting and idling problem in Carb Zen

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The damage will be more than Rs. 5000.
What is the cost of the pump in after market?
If you are looking for a cheaper alternative, ~500 bucks for a stand alone UCAL electronic fuel pump.
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Old 16th March 2014, 10:50   #23
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Default Re: Starting and idling problem in Carb Zen

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If you are looking for a cheaper alternative, ~500 bucks for a stand alone UCAL electronic fuel pump.
I am curious to know what that is and how it can fit into the Zen.
Is this a part for some another car? Where can I buy it? The car is at A.S.S. and they are going to remove the fuel pump motor to check if is working or not.
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Old 16th March 2014, 10:59   #24
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Default Re: Starting and idling problem in Carb Zen

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I am curious to know what that is and how it can fit into the Zen.
Is this a part for some another car? Where can I buy it? The car is at A.S.S. and they are going to remove the fuel pump motor to check if is working or not.
It can be used for any vehicle, nothing specific to Marutis.
The ASS folks sure will know, but wont tell you
http://www.team-bhp.com/forum/indian...ml#post2799825 (The Premier 118 NE thread)
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Old 16th March 2014, 16:49   #25
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Default Re: Starting and idling problem in Carb Zen

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It can be used for any vehicle, nothing specific to Marutis.
The ASS folks sure will know, but wont tell you
http://www.team-bhp.com/forum/indian...ml#post2799825 (The Premier 118 NE thread)
OK. Thanks.

So this pump is external, right?
The other option that I got from A.S.S. is a local made internal pump (meaning inside the fuel tank). That should be around 1000-1500 it seems.

I will get to know about the options on Tuesday.
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Old 18th March 2014, 10:42   #26
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Default Re: Starting and idling problem in Carb Zen

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OK. Thanks.

So this pump is external, right?
The other option that I got from A.S.S. is a local made internal pump (meaning inside the fuel tank). That should be around 1000-1500 it seems.

I will get to know about the options on Tuesday.
Update:
Visited the A.S.S. today to check out what is happening.
The regular contact was on leave, so spoke to the others - the SA there said you have to talk to the manager if we have to install something not Maruti authorized.
The manager took special efforts to convince me that external pump is not recommended. His main reasons were:
1. There will be some cutting involved and the seals can create problems later on.
2. Very unreliable solution
3. The wiring/ electrical system will get affected.


Now, I am not sure how much of this is true. But at the moment, if the car stops on the road, I don't know if it will start again.
They have not removed the motor and it seems that it cannot be serviced. I am not sure why it cannot be serviced though.

The outside market fuel pump is still an option and they are going to get back to me with the pricing in some time.
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Old 23rd March 2014, 10:39   #27
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Default Re: Starting and idling problem in Carb Zen

Got a local fuel pump - the A.S.S. procured it on my behalf (of course with no warranty) and fitted it.

Cost of pump with labour was around Rs. 1550
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Old 23rd March 2014, 11:01   #28
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Default Re: Starting and idling problem in Carb Zen

My own view will be to get a really good electric external pump.
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Old 23rd March 2014, 19:34   #29
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Default Re: Starting and idling problem in Carb Zen

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Got a local fuel pump - the A.S.S. procured it on my behalf (of course with no warranty) and fitted it. Cost of pump with labour was around Rs. 1550
Is the new one a mechanical pump?
In my opinion this will work fine for years.
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Old 25th March 2014, 14:49   #30
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Default Re: Starting and idling problem in Carb Zen

^This is just like the old one. The motor in the old one had gone bad (it was a cylindrical system). I believe they got the new motor and put it with the existing assembly. Unfortunately I was not present when the installed the part.

I did not want an external pump which could have it own side effects on the electrical system.

The car is doing well after the service. My wife is happy with the super smooth driving.
The oil change results in the temperature gauge reaching the correct level within a couple of minutes.
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