Extremely low fuel average

[hasankhurshid29]

Purchased few months ago. The engine is original.What do you mean by the history? I would love to share more info and get help.

These cars have swapped engine mostly. And they are not swapped properly
Like most lf them if mismatch wiring and ecu.
Are you sure this is the stock engine?
You can find the engine code on front of the engine below upper radiator hose. Take a pic of that and post here.

Also post a clear picture of complete engine bay.

[hasankhurshid29]

zara si race dekar choro to 900 RPM hojatay hain aur phr seconds kay andar hi 1200 hojatay hain RPM.

Means iacv is working. But maybe its slow that's why you can notice the 900 rpm. Did you get the iacv cleaned also when you get throttle service?

[bmuqtadir]

city SX8 2003

Its hard to tell anything more without more info. I think hasan sb is right, its either a fan directly connected or an idle air control valve thats getting stuck and needs cleaning.

[OvaisAlam]

Totally forgot to check the fan today. What are the long term disadvantages of running the car like this? What's the fix for direct fan?
Waise pehle 800-900 RPM per thi gaari idle mode main, ab khud hi 1200 per chali gae hai.

I will share the pic of the engine code.

Bas throttle body service ki thi mechanic ne. Should I clean the IACV too?

[OvaisAlam]

Bhai I have already updated the thread. What more info you need? I would love to share it to get help.

[hasankhurshid29]

Bhai I have already updated the thread. What more info you need? I would love to share it to get help.

Engine code
Pic of engine bay
Ecu picture

[OvaisAlam]

Image upload is not working for me (getting stuck at 100%)
Please click on the below links to see the images.

https://ibb.co/zmffjVx
https://ibb.co/Nm0Tqtw
https://ibb.co/Wt72vRB

Where to find the ECU? Under glove compartment?

[OvaisAlam]

Fan direct ho to uska hal kia hai? I will clean the IAC valve too.

[hasankhurshid29]

https://ibb.co/zmffjVx
https://ibb.co/Nm0Tqtw
https://ibb.co/Wt72vRB

Here are the pics uploaded by op for easy access:

[hasankhurshid29]

Fan direct ho to uska hal kia hai?

Easy way which most mechanics do is the short the plug of the fan switch. You can find the fan switch at the back side of the engine near the lower radiator hose going to the engine.

For more understanding check this video or you can get it done by any electrician: https://www.youtube.com/watch?v=BCvC_wnyuIs

[hasankhurshid29]

Where to find the ECU? Under glove compartment?

Any city owner may help you.
@sameerulhaq064

[hasankhurshid29]

Also I think your engine is the stock one so maybe your ecu and wiring is also the stock one.

[OvaisAlam]

Thank you for uploading the pics and for the YouTube video
I will let the electrician do the magic instead of doing "cheer chaar" with the wiring but could you please elaborate kay asal hal kia hai iska?

Engine original hai to baaqi cheezain bhi original hi houngi but I will post the pic of ECU too.

Ab kia kia jae? (apart from below things)
1. Fan ko switch per laana instead of being direct.
2. IAC valve cleaning
3. Injector cleaning

[hasankhurshid29]

1. Fan ko switch per laana instead of being direct.2. IAC valve cleaning3. Injector cleaning

Yes this the correct checklist to get the car on proper idle which will improve your fuel economy.

[hasankhurshid29]

but could you please elaborate kay asal hal kia hai iska?

When the car doesn't reach operating temperature, the fuel system is in open loop and it is pumping rich fuel mixture and high idle so the car reaches operating temperature quickly. As if it doesn't reaches operating temperature there will be more wear and tear.
So if we remove the thermostat valve and set the fan to run always, it means the car is running rich all the time and inturn giving you bad fuel economy.
So first step to get the cooling system properly working with auto fan and thermostat in place and if idle is getting bad, clean the iacv.

[hasankhurshid29]

The idle should be 700 rpm when operating temperature has reached

[OvaisAlam]

Thank you for the explanation.

One more thing that I noticed is that starting the engine is also starting condensor fan (my understanding is that this fan will only start if the AC is turned on). Is this usual or an issue too?

[nfssaad]

you need to dismantle the IACV. take it out and clean it. if its the piston type, it has a tendency to get stuck. if its rotating type, coking chokes it. it sticks and give unstable idle rpm.

in case of constant high rpm, it could be possible the ecu does not detect the temperature of the engine, and is keeping it at high idle constantly

[hasankhurshid29]

One more thing that I noticed is that starting the engine is also starting condensor fan (my understanding is that this fan will only start if the AC is turned on). Is this usual or an issue too?

No it should not turn on without turning on AC
Does radiator fan also turn on when you start the engine?

[OvaisAlam]

Okay, I will do that.
My radiator fan as well as condenser fan is starting as soon as the engine starts.