Civic CF4 Fuel Consumption Issue

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kanwar.shahid (kanwar.shahid) 2018-10-25 20:32:05 +0500 #21

ECU is swapped As i cofirirmed from last owner, I am sure The CNG kit over all removed. One the fan switch malfunction so I directed it ok I try to make it auto, Thanks for your kind support.

kanwar.shahid (kanwar.shahid) 2018-10-25 20:34:51 +0500 #22

Now my mechanic replace complete engine wiring. Scanned . only O2 sensor fault.

Hassan1991 (Electrical Engineer ) 2018-10-25 23:14:28 +0500 #23

There will be a fuel trim pot then

kanwar.shahid (kanwar.shahid) 2018-10-26 05:49:27 +0500 #24

Yes I tried it but in vein.

Hassan1991 (Electrical Engineer ) 2018-10-26 09:11:27 +0500 #25

Tried what?
Fuel trim pot or oxygen sensor should be there to put ecu in a close loop. Otherwise it will be like working on a choke (in easy words)

Hassan1991 (Electrical Engineer ) 2018-10-26 09:14:08 +0500 #26

Between Cf4 is a accord not a civic.
It's ES civic

kanwar.shahid (kanwar.shahid) 2018-10-26 11:28:51 +0500 #27

But there is no O2 Sensor in it, please read Mr Zeeshan remarkrs.

Hassan1991 (Electrical Engineer ) 2018-10-26 16:45:13 +0500 #28

You said you're having o2 sensor check light right? You're ecu was swapped.
In ES civic there's a fuel trim pot located inside the dashboard. It's a alternate sensor for o2. If it's not install there will be check light and behaviour of engine is same as without o2 sensor.
If you're still not getting it then tell me which ecu you're Es civic got right now?

kanwar.shahid (kanwar.shahid) 2018-10-26 18:29:46 +0500 #29

Rao sahib Yes there is pot in dash board, Now guide me what to do.

kanwar.shahid (kanwar.shahid) 2018-10-26 18:31:50 +0500 #30

Can we talk on phone, 03435959105

Hassan1991 (Electrical Engineer ) 2018-10-26 19:15:58 +0500 #31

Sure I'll contact you.

farrukhzeeshan (farrukhzeeshan) 2018-10-27 01:06:20 +0500 #32

Why he changed ecu, you said its only 150k driven and with you for the last 9 years. It couldn't go bad after running for few years.

I believe there are more surprises, more likely head assembly is changed and original engine number is punched on the new one.

farrukhzeeshan (farrukhzeeshan) 2018-10-27 01:08:29 +0500 #33

Don't replace things randomly without diagnosing the root cause.

What do you mean by O2 sensor fault, do you have one or not. Is car giving check light?

farrukhzeeshan (farrukhzeeshan) 2018-10-27 01:19:02 +0500 #34

You are confusing things here, you said ecu is swapped, either get the ecu code to make sure which model ecu you are running. Most probably its a jdm, as pkdm ecu are very expensive and hard to find. Moreover, PKDM ecu will not look for O2 as it works on map, and will never give O2 error.

If its a jdm, ecu must be looking for O2 sensor reading, if O2 is not there or faulty it will give check light.

farrukhzeeshan (farrukhzeeshan) 2018-10-27 01:21:33 +0500 #35

Please don't try to fiddle with the trimpot, how you will get its reading without scanner or ega. Without reading you cannot adjust it.

kanwar.shahid (kanwar.shahid) 2018-10-27 07:06:43 +0500 #36

I am clearing , but under stand my words, I baught this car in 2010, It was in very fine outlook Zabadast, Performance bhi, I worked in sheikhupura, so I have to daily outback from Lahore, its average with soft pedal 13-15.and in City 10 kM, Last September I went to a Service station, he washed the Engine as usual. after that The problem came. Before this I don't know what the 1st owner did, By my self I keep the car clean. oil filter change before time. I loved this car. Never give problems. Although some accidents.I visited the last owner but he asked he forget his son told me that there is problem with computer so papa replace it. He was a child and don' understand what happened at that time, but his father showed full rudeness. So whats happened before 10 years I dont know, The problem started in 1st. September 2018.

haseeb.basharat 2018-10-28 07:58:22 +0500 #37

Check plugs, there might be some water content in that area, check coils as well as you said problem came after you washed engine.

farrukhzeeshan (farrukhzeeshan) 2018-10-28 12:39:33 +0500 #38

Your mechanic changed wiring but problem is still there.

Mind sharing from where you are getting your car fixed.

Better contact some good electrician, who will diagnose and fix it properly.

I will suggest Jamal in Faisal town, on double road going towards centre flats from shaukat ali rd. next to ravi resturant, get it checked, he is very competent guy.

kanwar.shahid (kanwar.shahid) 2018-10-28 22:00:34 +0500 #39

Thank you Furrukh, I have adjusted the RPM to 700, Fans on auto.Lube 5W30 yellow one. Now feel Better. But not right. Also went to Jamal autos a few days back, The electrician Named Shahid, Checked its Plugs and found ok, as I mentioned earlier. He said that its ok and in his views the car is in best average. I told the whole the story as I already mention you, but he was not agreed with me. He said that there is no problem in vehicle. Some of its chotas said to go at Honda city center at Kalma chowk. the will fix the problem of ECU. Went to City center and the said the ECU is not for this car it is for Honda SI. so first you to replace the same. but not tell me more. Now any suggestion from your end????? Thank you for your responce......

kanwar.shahid (kanwar.shahid) 2018-10-30 10:22:05 +0500 #40

Waiting for your remarks. Furrukh sahib