Vitz brake issue while the ac is on on CNG

[junaid492]

bro i had the same problem but i got it fixed now even on ac my brakes are fine there is a mechanic at tariq road his name is niaz he fix this problem i went to many mechanics and even toyota shahra-e-faisal and drive-in but no one was able to even recgnise the issue but this mechanic solve the problem in very reasonable rates..his workshop is at tariq road..

well i cant come to karachi for that ...if u could help us by telling the problem

[Vaqas1]

Normaly the brake vacume pipe connected to the engine there is a small valve in that plastic pipe that will not alllow pressure to go both way. try to check that if its working fine.

I had same issue with charade but it was not that but, With corolla i never faced this issue.

[Hassan223]

Brother if u r still in trouble then dnt hasitate to give me a call @ 0321 - 4430780 .

[benaam]

bro as vaqas said its vaccum issue..mechanic has dissconnected the vaccum pipe which is connected with engine that resolves the braking issue he also had done some kind jugaad in it because if u dissconnect vaccum pipe with engine ur car will not start so ill confirm with mechanic then ill tell u..or ill give u his number u can call & confirm with him..

[khurrammaniar]

Its because of the vacuum pipe that`s present in cars that run on CNG....I was facing the same issue...Get the vacuum pipe changed .... Removing it and then putting it back might also help...try that first....

[hassanazeem]

any1 know some mechanic from islamabad that might have the expertise in solving this issue... my vitz has been doing this alot lately and have had quite a few close calls...

@sameer bhai: i'm waiting for a name from your...

[system]

but how it is ok on petrol if that pipe is faulty

[chinyoti]

@asad, pay ur Cng guy a visit, probably he has customers coming with the same issue and if theres a solution he knows it better.

People i noe in Karachi Vitz owners club who have there Vitzes on CNG nd faced this issue are

@OptimumSS
@Rawfay

They both have there Vitzes on Cng nd jahan tak i remember they faced a similar issue. PM them for a quicker response theyll guide you what they did on there cars to rectify the issue, and with there help you can also guide your cng mechanic what to do exactly

[Rawfay]

^thanks. I've made a thread on the solution for this.

https://www.pakwheels.com/forums/cng/139325-solution-vitz-acceleration-breaking-issue-cng

[system]

i do the same but brake issue remains the same with AC

[Storm]

@all
the problem arises when your idle is set too low on CNG,.. then it gets worse with teh AC on as the AC causes the engine to slow down even further,.. what you need to do is get the ilde set to compensate for this issue.

[system]

idle rpm is ok its same as it on AC n without ac

[atherrr]

Yeah it happens sometimes...althought my car is on petrol...but when im parking it wid ac on nd moving it forward nd reverse at 2 or 3 km speed.....the brakes become hard...becasue the pressure is not built....

[sbaig2]

bhi mechanic nay kiya kiya tha, issue kiya hai, mai apnay mech ko kiya kahoon kiya karay

[waleed80]

dont have any such issues in my platz at least. its the same as a 1.0 vitz. i m running it on CNG for last 3 years. have done around 60 thousand kilometers in it..long routes, short routes, flats, hills..everything...just no problem at all

[mercielago]

@asad1
problem is with the advancer of ur car
check ur advancer and if possible replace it with Landirenzo crank shaft adavancer to get maximum result of CNG from engine.

[engr.awaisiqbal]

I think check the front and rear brakes from mechanic. get them serviced and get them bleed and try to lower idle rpm on cng it should not be more than 1 k

[Navigator]

There is a mechanic in Lahore at Hakim Chok, Called Haji Sahib, The guy has resolved the problem of many Vitz. The issue is niether of tunning nor the brakes. He will remove the Venturi and Install an injector in the throttle body, few more adjustments and u will never have any problems with the Vitz on CNG.

[OptimusSS]

@all
the problem arises when your idle is set too low on CNG,.. then it gets worse with teh AC on as the AC causes the engine to slow down even further,.. what you need to do is get the ilde set to compensate for this issue.

+1

[afnan_88]

i m also having this issue in my jap alto cng . . .