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  1. Mukul Mathur
  2. CNG Kit, LPG Kit
  3. Saturday, June 17 2017
Hi,

My car was jerking a lot on CNG mode, for the past one week. I went for the checkup, he checked Thru software & said you to change the map sensor to make it smooth. Adding to this since all the spark plugs were also short, I got all the plugs changed.

Since then, my car is missing a lot & I am unable to accelerate on CNG.

Any help would be appreciated and also Where can I purchase a MAP sensor (MP 48) for my Honda car, in or near Dwarka, Delhi. Pls help it's urgent..you may call me at 981949412

Regards,
Admin Accepted Answer
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Hello,

Which brand CNG Kit ?

I believe the Retro Fit center would have had performed scan
Did he shared the error code ? What was the MAP Sensor Reading

To tell you - MAP sensor in layman language is used by ECU to determine the Air flow rate and thus impact the performance of car in air-fuel mixture and ignition timing. As you mentioned that the car is unable to accelerate and pickup - technically very low engine load - it yes could potentially be due to issue MAP Sensor or related to other reasons like O2 Sensor too

if the car working fine on petrol and the issue only happens CNG - suggest to visit retro fit center and get scan done with error codes, if only they confirm for an issue - then go for replacement of MAP Sensor (which comes according to CNG Kit type - Every CNG Kit has different MAP Sensor)

In terms of costing - can anywhere cost around Rs 2500 - 3000 for the CNG MAP Sensor
Should help !!


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  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 1
MANDEEP Singh Accepted Answer
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I'm glad I find cng related thread on net.
I am currently also facing this same problem. I read my engine fault code via obd 2. I clearly said problem is high air intake on bank 1.

My cng guy i have some error.

Today i will go to him again to rectify this. I hope he will solve it. I wil update here too.

op did you solve your problem.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 2
Masri Khuti Accepted Answer
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Sir I have a Hyundai verna fluidic 2012 model vtvt 1.6 sx. I institutiol Lovato sequence cng kit some 1 year ago. Now my car jurking after 50-60 km run in cng and engine light also blinking some 10-12 second.
I changed car pluges and scan also. But not any responses. What can I do?
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 3
Paritosh Panchal Accepted Answer
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Hello

I have faced the same issue in Nissan Datsun Go and i have managed to solve it by changing TAP(Timing Advance Processor).
Now my car runs very smooth and there is no Engine Check light and Jerks.

Hope this helps you.
Thanks
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 4
Subho Accepted Answer
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My alto 800 2018 modal CNG kit fit in 2019 now some problem creat in my car. When ac on and first gear car pick late acceleration. Plz suggest me


  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 5
Ritesh Accepted Answer
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hi,
i have 2 vehicles. WagonR 2011 with BRC CNG KIT & Honda City 2007 ZX VTEC with Lovato KIT.

Following are the reasons which may help ypu.

- Spark Plug Condition or GAP as CNG needs more gap then Petrol.0.8 would be ideal.
- Coil - one or moil is having leak in current that might be the issue
- some wiring issue with CNG system like cracks in wiring or cap looseness etc
- MAP sensor -
- TAP

- like one more thing Engine check light - its normal on CNG cars as people are running mostly on cng & hence it leads to blinking the light. in my wagon R its is since 4 years but it is running fine with mileage on 18 iin city & 21 in highway.

- i have issue with CNG while running on 1200 to 2000 rpm that it jerks & after that it runs very smooth (Mileage drops, earlier 180 kms & now 130 kms). ALSO some time it runs smooth even on same RPM. but on petrol it runs very fine.

if any one has suggestion, please let me know.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 6
Ritesh Accepted Answer
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Hello,
with reference to the issue of missing on CNG,

in Honda City there was a jerking issue as i mention in earlier post, i have gone through the following;
1. i have tried to resolve issue by resetting ECU, - it improves by some 20%
2. i went to Mechanic & ask him to check Spark Plugs & ignition coils.
Spark Plugs were OK - all 4.
Coils ; one coil having current leakage -heavily & 2nd coil was having little beat.
Leak was arrested by applying insulation tap & observed 100 % improvement. - Bingoooo......
Even though - i have replaced one coil & rest all corrected.after that i drove around 34 Kms & observed no jerks even after running with 3rd gear with low speed. & seen problem is resolved back to original performanace.

- i will see for next few days to check out mileage on CNG (improves or not; but strong feeling it will improve)
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 7
Maninder Singh Accepted Answer
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I had installed Mijo CNG kit in my Alto K10 Vxi (Model: 2016) in July, 2020. Mileage is good, i,e, 30 +/-2km/kg. Pick-up is also good with Timing Advancer and not good without Advancer. But it has a problem which is not getting resolved after cleaning of Throttle body, fine-tuning/calibration many time and by-passing the Timing Advancer; i.e. On random occasions, while on highway or on taking turns, when I leave the Accelerator and press clutch for breaking or turning, Engine gets Off suddenly. As this is a very random problem, so even the Retro-fitment center can't re-create it in front of him. It is very risky that Engine gets of on road and in turns.

Plz confirm what can I do to resolve this.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 8
Ravi Kant Accepted Answer
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I had installed ACE CNG kit in my Honda Brio in . Mileage is good, Pick-up is also good with Timing Advancer and not good without Advancer. But it has a problem which is not getting resolved after cleaning of Throttle body, fine-tuning/calibration many time and by-passing the Timing Advancer; i.e. On random occasions, while on highway or on taking turns, when I leave the Accelerator and press clutch for breaking or turning, Engine gets Off suddenly. As this is a very random problem, so even the Retro-fitment center can't re-create it in front of him. It is very risky that Engine gets of on road and in turns.

Plz confirm what can I do to resolve this.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 9
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I am facing the same problem in my Wagon-R K-Series Model 2011 fitted with GN Group Sequential CNG Kit with 48 Pin ECU. Ignition goes off on low speed say 20-30 KM on odometer. Its running fine when the car is in continuous acceleration. When I leave my foot from the accelerator padel running on 50-60 KM when the speed comes down below 40 Km the ignition goes off on the running vehicle. Then I use self key in running vehicle to keep the vehicle running. The CNG technician have checked the CNG System and connected his laptop for settings and have also changed the Timing Advancer. The picup improved by changing the Timing advancer but the main problem of ignition goes off on low speed while AC is on remains the same. The spark plugs are cleaned, ignition Coils are ok. I change spark plugs on every service interval of 10000 KM in my Wagon-R. Now these spark plugs are also new run only 4000 KMS. But the problem of ignition goes off on low speed while AC is on still remains their. The car is running fine while running on petrol mode. There is no jerk or engine going off in petrol. Please suggest what to do now. I had cleaned the throttle body last year in June'2020. I have run only 8000 KMS when the throttle body was last cleaned.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 10
Maninder Singh Accepted Answer
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HI. My Alto K10 was giving this problem as mentioned in the above comments, which was resolved after changing the Spark Plugs to NGK Make and after that Calibration of Throttle body was done, which is necessary if it is being cleaned by taking it out. Plz try and confirm if it gets resolved.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 11
Manoj Goyal Accepted Answer
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I have my Car Toyota Etios fitted with CNG. I am facing problem that on red lights or other stoppages the throttle of the car didnt work. I have to shift the car from CNG to petrol then only it picks up the speed. Can Someone help what will be the issue.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 12
Raghav Accepted Answer
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Hello sir,

I have Alto 800 2013 with company fitted CNG.

I am facing jerk issue on idle condition and running as well when Switch off the AC car start performing normal and this happening only when CNG is left with 3 point.

After filling full CNG car start performing normal

Please suggest
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 13
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