Tata Zest Review & Pictures: Zestful Endeavour


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Oct 1, 2015
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The lights don't come up at all and I experience this when the car is in 4th or 5th gear. When there is loss of power, it's like, it doesn't respond to throttle input at all. The car seems to be like dead, though the engine is ON. I have to downshift, or switch off the AC button, to keep moving. There is no change with the display or error lights during this. Also noted that this happens most frequently driving during afternoon with AC at 2 or 3 speed.

And yes, I did receive your e-mail and Sent a message already..Thanks a lot. Will keep posted here.
I am back with an update about the power loss issue. As I was in Goa with my Zest RT and had written to Tata customer care, they routed the query to Mr.Nikhil from Tata Motors who arranged Car pick up by the Auto Industries Goa (TASC) on 11th May. After several phone calls and discussion with Mr.Nikhil, I was told they have cleaned the air filter, fuel filter, checked spark plugs and fuel pump and everything was normal. They checked error codes with the laptop and everything I was told was normal. They took a test drive of close to 162km till the car was delivered back to me on 12th May at 7 pm. They again asked for the car to be picked up for further check on 14th May and I was not told what check they are doing but was told it is inspection of the work done couple of days back. That day again the car was driven close to 82 km mainly because of the distance between service centre in south Goa and my home in North Goa. E-mail written to Mr.Nikhil about what exactly was done on both occasions is still unanswered, so cannot share here precisely what was done.
Car was delivered back to me on 14th May by evening 4 pm and I drove it for about 50km after that and the issue has not cropped up.
Will update if I experience this again. But at the end I am not too certain that this issue will not come. Many Zest owners are still reporting this and Tata motors must do some work on going to the root of this problem.
 
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I too feel the same.

They completely changed the ecu settings and whenever they drove, the issue didn't arise.

They were honest and gave a written note saying issue is not there "as of now ".

No issues till date.
 
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Tata zest or polo petrol.. Confused.. Can anyone help
I went with Diesel because you cannot beat TATA Diesel engine. Its Quatrajet is a proven engine but when it comes to Petrol, MHO would be no no to TATA

just completed 14K km on my ZEST XT and touch wood, have`t faced any issue till now. The car runs smooth. Few things to work upon are
1. The low beam is very low on highway, not sure if to change the OEM bulbs to HID or attach Hella lights. Suggestion pls
2. voice control is not accepting 'call' command. Have to check with the service enter
3. Mileage has come down. City its 16 and on highway 20 with full ac

Other than the above mentioned, she runs smooth and everyone is happy.
 
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just completed 14K km on my ZEST XT and touch wood, have`t faced any issue till now. The car runs smooth. Few things to work upon are
1. The low beam is very low on highway, not sure if to change the OEM bulbs to HID or attach Hella lights. Suggestion pls
2. voice control is not accepting 'call' command. Have to check with the service enter
3. Mileage has come down. City its 16 and on highway 20 with full ac

Other than the above mentioned, she runs smooth and everyone is happy.
The low beam is very poor. I didn't change the lights as I wanted to know the exact lights that would work out without stressing the battery. With all the gizmos, the battery is already overloaded.

Please get your microphone checked and for peace of mind get the ECU updated, it must be a software glitch.
 
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May 11, 2015
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Was driving to my home town today. Distance is around 75 kms.
Faced loss of power issue multiple times on my way:
1. Speed: 40-45, Gear: 4, AC:On(eco), Driving mode: city, DTE: around 110.
Car suddenly lost power. As I tried to downshift to 3rd, lights on the meter console turned on as if car was turned off, but just for one second and everything was fine then.
2.Speed: 55-60, Gear: 5, AC:On, Driving mode: city, DTE: around 100
Turned off the eco mode in a.c after facing issue for the first time. This time also lights on the console turned On. Didn't tried to downshift this time. Waited to see how long will it take to correctly perform. Took 2 to 3 seconds and everything was fine again.
3.Speed: 65-70 Gear: 5, AC:On(eco), Driving mode: city, DTE: around 85.
Again same problem, power suddenly lost. There were no lights in the console as earlier. Downshift indicator was blinking. Issue automatically fixed after 3-4 seconds.
All this happened in first 45-50 kms of the trip.
Did a tankfull and continued.
Driven on same speeds and similar other conditions. The only difference was that DTE now was 400+kms. For the last 25 odd kms of the trip there was no loss of power issue seen.
Can others facing similar issue confirm this behavior? I don't know if TATA has fixed this or not yet but it needs to be.



Congrats on your car. Zest looks best in sky grey. What is the on road cost for you?
I bought the same color and variant on 9th may.
Hi, I have faced this issue just before my second service was due. I stated in the job card that i am facing this issue and the service center promised to look into this. After the service i didnot see this issue cropping up UNTIL the petrol indicator was around 2 points and it increased when the petrol indicator started glowing orange. Well i own a Zest XMS RT vehicle. Once after refilling the petrol to full tank i never faced the loss in power.
This issue again repeated two or three weeks back when my petrol level dropped to two points on the Petrol Indicator. I guessed the reason could be the few last liters of petrol but i thought i should check again so i refilled the tank to full.Today when the indicator was on the last point (with Orange light glowing) and with my AC ON, i felt the loss in power and my car struggling to keep the engine ON, this happened for 2-3 seconds.
I am not concluding but based on my experience and after reading your post i feel the last liters of petrol (which may contain contamination's) are the reason for the power loss.
 
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Hi, I have faced this issue just before my second service was due. I stated in the job card that i am facing this issue and the service center promised to look into this. After the service i didnot see this issue cropping up UNTIL the petrol indicator was around 2 points and it increased when the petrol indicator started glowing orange. Well i own a Zest XMS RT vehicle. Once after refilling the petrol to full tank i never faced the loss in power.
This issue again repeated two or three weeks back when my petrol level dropped to two points on the Petrol Indicator. I guessed the reason could be the few last liters of petrol but i thought i should check again so i refilled the tank to full.Today when the indicator was on the last point (with Orange light glowing) and with my AC ON, i felt the loss in power and my car struggling to keep the engine ON, this happened for 2-3 seconds.
I am not concluding but based on my experience and after reading your post i feel the last liters of petrol (which may contain contamination's) are the reason for the power loss.
Good analysis Kallem but we do have pertrol filter inside the cap?
just a question to those who says power loss, do you fill petrol / diesel in the same bunk or multiple places caz in many places the density differs
I always make sure I fill it from India Oil near to my house and if not, atleast any other Indian Oil but never from highway because in highway, the diesel are maintained for heavy vehicles
 
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Good analysis Kallem but we do have pertrol filter inside the cap?
just a question to those who says power loss, do you fill petrol / diesel in the same bunk or multiple places caz in many places the density differs
I always make sure I fill it from India Oil near to my house and if not, atleast any other Indian Oil but never from highway because in highway, the diesel are maintained for heavy vehicles
I didn't find the power loss with respect to fuel level. I had faced this issue even when the tank was having good amount of petrol and also when the fuel was in reserve.

I have used same fuel pumps with my previous car but never faced this issue. Even if the density of the fuel varies, I think cars are made to suit and face such things.

Today's modern cars have been used to cover the length and breadth of the country and if different fuel were the case I think other cars should also face the same issue.

This issue is prevalent only in petrol zests. The diesel zests don't face this issue. It is particular only to the petrol zests.

The issue has not been resolved by tata motors, but I think if this issue is sent to them by the owners collectively they may start looking into the issue.
 
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Driven 80kms today, didn't face the loss in power issue. Tried to keep the rpm between 1500-2000 mark.

Completed 730 kms till now. Avg. got for last tankful is 13(around 400kms, city mode, 50%highway and 50% city drive, ac 100% on). However, mid was showing an avg of 15.1
 
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Driven 80kms today, didn't face the loss in power issue. Tried to keep the rpm between 1500-2000 mark.
Even I was going through a ownership review, where the owner stated that he used to face the power loss issue but he used to shift low down the rev range. Once he started shifting at 1500-1700 rpm, the issue was gone. Can that be a cause?
 
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Even I was going through a ownership review, where the owner stated that he used to face the power loss issue but he used to shift low down the rev range. Once he started shifting at 1500-1700 rpm, the issue was gone. Can that be a cause?
That power loss is just turbo lag. There is a delay in power delivery just before the turbo kicks which is perceived as loss.

The power loss here is no response to throttle inputs and engine feels off.
 
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That power loss is just turbo lag. There is a delay in power delivery just before the turbo kicks which is perceived as loss.

The power loss here is no response to throttle inputs and engine feels off.
Well, turbo lag is a common thing. What he mentioned is that there was loss of power and also the engine lights were on in the instrument cluster. Turbo lag should not cause the engine check lights to come on.
 
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Yesterday i had an opportunity to drive Ciaz though you cannot compare it with Zest because both are different segment cars but what i wanted to check was how it handles potholes and cabin noise and to my surprise there was no major change. I felt Zest does a good job.
Overall I am happy Zestian :)
 
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Good analysis Kallem but we do have pertrol filter inside the cap?
just a question to those who says power loss, do you fill petrol / diesel in the same bunk or multiple places caz in many places the density differs
I always make sure I fill it from India Oil near to my house and if not, atleast any other Indian Oil but never from highway because in highway, the diesel are maintained for heavy vehicles
Agree with you that it has petrol filters and as i claimed i may be wrong as well. I fill petrol from the same bunk and use Shell petrol. I didnot face the power loss on open roads or highways. I try to maintain the RPM above 1500 but again in bumper to bumper traffic i hardly can maintain such RPM. I see this problem on such traffic and with AC On.
 
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