Car AC Diagnosis of Various Symptoms Dedicated Thread

[wasim625]

No sleep Bumpp [emoji14]

[afnan.bashir]

Umm - i just noticed. my bad i wanted to say i wana buy all those guages where can i get them?

They are common things. Get them from any shop near ganga ram hospital

[adeel7771]

They are common things. Get them from any shop near ganga ram hospital

any good seller in islamabad/rawalpindi?
also which brand these tools should be good?

[chusmankhalid]

i own a jdm alto. A,C is pretty ok. But when I apply sudden brakes with A.C ON the rpm drops; the car knocks and than engine goes OFF. what can be done. without A.C car is totally fine.

[hash4u]

one of the cars i used to own had an issue that the condenser leaked regularly.had to change the condenser problem still persisted
AC guys used to repair condensor with a weld, topped gas, and send the car back.
just for knowledge sake can anyone tell me what can cause the leaks? and what should have been the right fix

[ahsanonline]

any good seller in islamabad/rawalpindi?
also which brand these tools should be good?

I think I will take a trip to the shop a Wheeler posted about. Will ask, and possibly buy some stuff. Will let you know when I do.

[afnan.bashir]

i own a jdm alto. A,C is pretty ok. But when I apply sudden brakes with A.C ON the rpm drops; the car knocks and than engine goes OFF. what can be done. without A.C car is totally fine.

This could be AC putting load on engine but it cant be AC Alone.

[afnan.bashir]

one of the cars i used to own had an issue that the condenser leaked regularly.had to change the condenser problem still persisted
AC guys used to repair condensor with a weld, topped gas, and send the car back.
just for knowledge sake can anyone tell me what can cause the leaks? and what should have been the right fix

That could be Condenser getting touched to body from place other than its holdings. Also if some small stone that comes out of front car's tire becomes tangent and has reasonable force to crack windshield too at speeds. It depends on what sort of leaks you have.

[chusmankhalid]

This could be AC putting load on engine but it cant be AC Alone.

someone advised me to service the throttle body.

[wasim625]

someone advised me to service the throttle body.

Throttle doesn't need to be serviced unless 25% of throttle plate is stucked opened due to debris. Which is as rare as water in desert.

[afnan.bashir]

someone advised me to service the throttle body.

Most cars have IDLE CONTROL VALVE. If that is not working you need to service that. Otherwise you dont need to play with throttle body. When you turn on your head lights does RPM Raise? do you feel too much power loss when you turn on AC

[chusmankhalid]

Throttle doesn't need to be serviced unless 25% of throttle plate is stucked opened due to debris. Which is as rare as water in desert.

the car has clocked 70k km and till date the throttle has not been serviced....

[chusmankhalid]

Most cars have IDLE CONTROL VALVE. If that is not working you need to service that. Otherwise you dont need to play with throttle body. When you turn on your head lights does RPM Raise? do you feel too much power loss when you turn on AC

Dear no such thing.... Load is normal considering a 660cc engine

[wasim625]

the car has clocked 70k km and till date the throttle has not been services....

Stick with 25% stucked open rule. I have 167K and throttle not serviced.
Mechanics don't know how to handle throttle bodies they even mess them up servicing them. This recommended by @xulfiqar

[afnan.bashir]

Dear no such thing.... Load is normal considering a 660cc engine

If no load then this means its not AC. Your IDLE Control valve may be culprit. Which car do you have

[chusmankhalid]

If no load then this means its not AC. Your IDLE Control valve may be culprit. Which car do you have

suzuki alto 660cc. obviously there is a load when we ON the A.C but car dont get tooo "HEAVY"

[wasim625]

suzuki alto 660cc. obviously there is a load when we ON the A.C but car dont get tooo "HEAVY"

Afnan is saying does engine RPM increases when you switch On your headlights?
It should increase if IDLE control valve is working.

[ahsanonline]

Can anyone tell just by looking at the pics what size ports these are?
Low side: OD - 11m (ID approx 7.95mm)
High side: OD - 14mm (ID approx 8.6-8.8mm, couldn't measure proper)

[chusmankhalid]

Afnan is saying does engine RPM increases when you switch On your headlights?
It should increase if IDLE control valve is working.

I will check on that and will inform you. but apparently its quite difficult to tell as there is no rpm meter.

[wasim625]

I will check on that and will inform you. but apparently its quite difficult to tell as there is no rpm meter.

You should and probably you will feel an increase in the RPM.