Baleno cylinder not working

[pwuser160120607315]

My baleno was dropping RPM on AC while idle or while holding cluth causing it to do missing.

I went to my mechanic today. no error showed up in scanning. mechanic tried everythinng, tuning, cleaned all sensors,tapet setting, coil checking, spark plugs cleaning, throttle body cleaning. He tried everything. Still the issue has improved but not fixed. There was one injector when he removed it nothing happened to the car, he said one cyclinder isnt working but then he cleaned the spark plugs etc again and the cylinder worked then but then it stopped working again. The mechanic tells me that i need to check the electric things, get my wiring done because the spark plugs are getting black and he says it is using more fuel.

The car is still dropping RPM on AC while idle or turning steering wheel to the left or right completelt during uturns.

Can this be an electric problem?

[Proverbial_Slang]

Go step by step. Change your mechanic if he wasn't able to figure out what's wrong.
If the spark plugs are getting black, oil might be entering the combustion chamber. Do a compression test and check valve seals.

Is the engine reducing oil? Spark can also be checked easily. I don't know why your mechanic wasn't able to figure it out. Which city are you from BTW?

[pwuser160120607315]

Im from karachi.

He did a compression test and it was good.
Engine is not reducing oil.

[pwuser160120607315]

I just noticed that pressing break also drops rpm and dims headlight, and turning the steering to extreme left or right also dropping rpm.

[syncview]

that will happen if one of the injectors aren't working.

If the mechanic has narrowed it down to an injector not working, it could be three things:

1 - faulty injector

2 - bad wiring - check signal at injector connection to confirm, if there is no pulse its either due to wiring or faulty ecu

3 - bad ECU

apart from the above, with a good compression, spark and injectors firing properly the engine shouldn't have any problems running smoothly.

[Proverbial_Slang]

If pressing brake reduces RPM, it's most probably a vacuum leak in the brake booster pipe or the brake booster might be leaking.

Check all fan belts for wear and looseness as well.

Check all el;ectrical connections starting with battery terminals and going towards the generator contacts.

[pwuser160120607315]

I took the car to my mechnic today.My mechanic tells me that there is a pressure leak in head, head gasket cut hogyi hai. and also the valves are leaked. He tells me that valves par hee 6 7 hazaar lagjaynge, and baaqi cheezain waghaira b, labour uski apni 4 thousand rupees.

He says roughly minimum 12 to 15 thousand cost aygi, and i think this was without his labour.

[Proverbial_Slang]

Get a second opinion. I don't think a leaking head gasket and valves would result in RPM drop on pressing brake or turning the wheel.

Also, leaking valves would result in lo0wer compression during the compression test.

Please change you mechanic ASAP!

[xenerking]

brake booster vacuum line is connected with engine, please check the pipe for leaks..

[rajaatta]

Seems like injector is faulty. In baleno fuel injectors tends to fail if the fuel filter mounted on back of intake manifold is not changed for longer periods.
Get the injectors check one by one by removing the grip and also ask the mechanic to swap the injectors from 1 to 3 and recheck again if the faulty cylinder starts to work or not.
If the head gaskit was crossed or leaked then conpreasion would not go beyond 70 PSI cross check it.