Cuore doesnt brake with air condition

[pwuser156839263544]

Asalam o alaikum. I have coure cx 2001 converted to automatic by previous owner. I installed ac in the car and now it's not braking when ac is on. With ac on and when you put car in D or R ( specially in R) it stalls turns off. Mechanic are unable to find the reason. One replaced brake booster other replaced cng kit. But it happens both on cng and petrol. Now yesterday one mechanic said it requires engine bore. On the other hand it dosnt smoke or reduces the oil etc. When I put gas in ac it worked for three days fine only heating issues and when I one mechanic did the jugar I've a sudden braking problem on an ac

[hash4u]

issue with the vacuum lines

[pwuser156839263544]

Thank you brother I think the same but the mechanic are insisting the care car requires overhaul with more 30k

[nfssaad]

your city?

[pwuser156839263544]

Peshawar

[dayrider]

Go to new car care, Gul Nawaz +92 300 5856543.
He shall help diagnose the actual issue

[margallar]

no way engine is fine

[pwuser156839263544]

Thank you bro I'll visit him. Now new problem arose when i put it in D or R with ac or i apply brake with ac. The car stalls

[dayrider]

The ivac might be malfunctioning

[pwuser156839263544]

Brother what's ivac. I have carburetor 850cc. Brother i have called gul Nawaz. In sha Allah in a couple of days will visit him thanks dayrider

[dayrider]

Idle valve ac. It controls the fuel flow while the ac is on

[pwuser156839263544]

Ok. Brother. I'll check it

[suzukialtomehran]

Here is a complete Vacuum diagram for ED10 Daihatsu Coure Engine.

[margallar]

i think the idle up may be too high

[Xulfiqar]

The idle up is set too high - on automatic transmission cars the idle speed is set in D and the AC is set so it doesnt raise rpm beyond normal idle speed.

and to check for sudden stalling when you brake - remove the pipe from the brake booster and plug it.

If the problem goes away, your brake booster is shot too.

[pwuser156839263544]

Brother thank you for reply. I am your fan. Brother I have changed brake booster.... but it's still the same.

[pwuser156839263544]

Brother naeem.ashraf I have complete cuore manual. But still it is not helpful

[pwuser156839263544]

What do you mean by shot xilfiawar bhai

[suzukialtomehran]

Do as Xulfiqar bhai said. And shot means its faulty

[Xulfiqar]

Brother I have changed brake booster.... but it's still the same.

did your mechanic bother to test the booster before ripping it out of the car?

is the engine in

good state of tune?
correct idle speed?
correct engine speed with A/C running?
correct ignition timing?
correct dwell timing?
correct operating temperature?
all vacuum pipes connected correctly? (distributor has a main and sub vacuum port)