Automatic switching between cng and petrol

hammadmajeed · 01-07-2009, 01:23 AM

Lately, I am getting this weird problem of automatic switching of the car from cng to petrol and instantly back to cng. There is no fixed pattern of the occurance of this problem.

Any idea what may be the problem ?

panicslayer · 01-07-2009, 01:28 AM

U just named ur problem, didn't define. How can v solve it in this way? Everybody would ask the same question, what's the problem exactly

hammadmajeed · 01-07-2009, 01:41 AM

Well, what i wanted to say was, while driving on cng car automatically (without I touching switch over button) switches to petrol and instantly switches back to cng. This thing has happened couple of times.
any ideas ?

panicslayer · 01-07-2009, 01:52 AM

Hmmm may b a faulty switch or can b short wiring. Get it checked asap. Should not take more than 5 minutes to diagnose by a professional

Xplorer · 01-07-2009, 01:03 PM

Connector or grip of CNG switch may be loose.

Fuse of CNG may be loose.

Or some other wire of CNG is not properly connected.

This is not "Automatic switching between cng and petrol" rather it is "Abnormal switching between cng and petrol"

Zyrak · 01-07-2009, 02:09 PM

dear this may be the problem of your touch switch which performs the operation of changing because very often swtich gets fault due to moisture or rust present in it. if its the fault of switch, the you can easily repair it just by cleaning it with spirit or thinner. otherwise check your fuse or grip etc.

stonedsaint · 01-07-2009, 02:23 PM

does it happen at low rpm .... like when are slowing down on signals etc ? or at some steady rpm ?

auto switching happens in efi cars when rpm drops on cng to lowest level due to any problem, it converts to petrol, on gaining the rpm again, it switches back, had seen this prob in one frnds vario .....

explain the occurance of problem , scenario .....

alimodell · 01-07-2009, 02:33 PM

Sensor problem.....
change your switch..and save ur sensor of water

chinyoti · 01-07-2009, 03:29 PM

ive got the same issue wid my dads Baleno, + sumtimes it doesnt even cumes to CNG and cumes wen it wishes, then sum times the abnormal switching btwn petrol nd CNG occurs

ahmedshaikhani · 01-07-2009, 10:41 PM

Problem is with advancer get your advancer changed.

hammadmajeed · 02-07-2009, 11:56 AM

@stonedsaint,

yes you got it right. I think I have to adjust my cng for idling.

thanks,

@rest all

thanks for your suggestions and input.

01-07-2009, 01:23 AM	#1
hammadmajeed 677 days old at PW Location: Islamabad Age: 34 Posts: 59	Automatic switching between cng and petrol Lately, I am getting this weird problem of automatic switching of the car from cng to petrol and instantly back to cng. There is no fixed pattern of the occurance of this problem. Any idea what may be the problem ?

01-07-2009, 01:28 AM	#2 (permalink)
panicslayer 385 days old at PW Location: Peshawar Age: 28 Posts: 7,927	U just named ur problem, didn't define. How can v solve it in this way? Everybody would ask the same question, what's the problem exactly __________________ I take my car out of garage hitting 9Gs. That's why I was not selected as a pilot because they do it in air going forward, I do it on ground going backwards \|\|\|\|\|\|\|\| Ferrari's interior reminds me of local Railway Engine's interior \|\|\|\|\|\|\| I would like to have a Rolla if they start producing it with company fitted BRAKES

01-07-2009, 01:52 AM	#4 (permalink)
panicslayer 385 days old at PW Location: Peshawar Age: 28 Posts: 7,927	Hmmm may b a faulty switch or can b short wiring. Get it checked asap. Should not take more than 5 minutes to diagnose by a professional __________________ I take my car out of garage hitting 9Gs. That's why I was not selected as a pilot because they do it in air going forward, I do it on ground going backwards \|\|\|\|\|\|\|\| Ferrari's interior reminds me of local Railway Engine's interior \|\|\|\|\|\|\| I would like to have a Rolla if they start producing it with company fitted BRAKES

01-07-2009, 01:03 PM	#5 (permalink)
Xplorer 759 days old at PW Location: Islamabad Age: 34 Posts: 399	Connector or grip of CNG switch may be loose. Fuse of CNG may be loose. Or some other wire of CNG is not properly connected. This is not "Automatic switching between cng and petrol" rather it is "Abnormal switching between cng and petrol" __________________ !!Say NO to TOBACCO!!

01-07-2009, 02:23 PM	#7 (permalink)
stonedsaint 1,362 days old at PW Location: Islamabad Age: 27 Posts: 1,481	does it happen at low rpm .... like when are slowing down on signals etc ? or at some steady rpm ? auto switching happens in efi cars when rpm drops on cng to lowest level due to any problem, it converts to petrol, on gaining the rpm again, it switches back, had seen this prob in one frnds vario ..... explain the occurance of problem , scenario ..... __________________ -_____SmoOoOooKennnnn_____ !

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01-07-2009, 01:41 AM	#3 (permalink)
hammadmajeed 677 days old at PW Location: Islamabad Age: 34 Posts: 59	Well, what i wanted to say was, while driving on cng car automatically (without I touching switch over button) switches to petrol and instantly switches back to cng. This thing has happened couple of times. any ideas ?

01-07-2009, 02:09 PM	#6 (permalink)
Zyrak 235 days old at PW Location: Pir mahal Age: 29 Posts: 13	dear this may be the problem of your touch switch which performs the operation of changing because very often swtich gets fault due to moisture or rust present in it. if its the fault of switch, the you can easily repair it just by cleaning it with spirit or thinner. otherwise check your fuse or grip etc.

01-07-2009, 02:33 PM	#8 (permalink)
alimodell 665 days old at PW Location: Lahore Age: 23 Posts: 34	Sensor problem..... change your switch..and save ur sensor of water

01-07-2009, 03:29 PM	#9 (permalink)
chinyoti 1,541 days old at PW Location: Karachi Age: 20 Posts: 2,639	ive got the same issue wid my dads Baleno, + sumtimes it doesnt even cumes to CNG and cumes wen it wishes, then sum times the abnormal switching btwn petrol nd CNG occurs __________________ I am owner of a JDM vehicle.

01-07-2009, 10:41 PM	#10 (permalink)
ahmedshaikhani 283 days old at PW Location: Karachi Age: 19 Posts: 169	Problem is with advancer get your advancer changed.

02-07-2009, 11:56 AM	#11 (permalink)
hammadmajeed 677 days old at PW Location: Islamabad Age: 34 Posts: 59	@stonedsaint, yes you got it right. I think I have to adjust my cng for idling. thanks, @rest all thanks for your suggestions and input.

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