Honda Civic 1997 unstable RPM fuel average and ECU [Solved]

[kashif91ahmed]

My car flooded and after that engine crenk but not start then I washed ECU with petrol and it's work again. Now it start show different issue the RPM is unstable and consume lots of fuel I replace the air flow sensor as per mechanic guide & it still not fix ️ then I show ECU to computer guy he tried to repair but not get success and asked me to change the ECU which cost around 18k for my car and 6k for labor work.
According to mechanic it's alter ECU and it's city for manual transmission, you never got fixed this. After listen I realize that my only option to replace but still worried will it work or not

Please guide me how can I fix this issue, I want to keep this car for long term

[hasankhurshid29]

You are posting same thing in different threads

[hasankhurshid29]

@nfssaad
@rajaahmed96
@hassan1991
@shabbir.1

[hasankhurshid29]

Check engine light on?

[kashif91ahmed]

Yes engine light is on. What are the other stuff which I need to check too ?

[hasankhurshid29]

What codes are being shown when checked through scanner?

[hasankhurshid29]

You can check codes yourself by shorting out two wires near ecu. Not wires more of a connector

[kashif91ahmed]

I don't know the code, he just tell me after complete check and show the readings of fuel injector and map sensor

[kashif91ahmed]

Can you tell me details that how can I dignose myself

[alibintahir]

My car flooded

So sorry to hear about your loss.

Can you tell me details that how can I diagnose myself

You can buy an ELM327 OBD II Scanner Adapter (not so expensive) and connect it with the OBD2 connector of your car and you can check about the error codes of your car by yourself and once you know the issues, you can pinpoint it to the mechanic and get it resolved properly rather than mechanic just guessing the problems and charging you whenever he connects the computer with your car.

Hope it helps.

[kashif91ahmed]

ELM327

Where can I get this in Karachi

[alibintahir]

Where can I get this in Karachi

Sorry, I'm not from Karachi, so I can't help you with this, but you can order it online with ease.

[kashif91ahmed]

Sure, let me try some trick suggest by @hasankhurshid29 first, I hope that will works. If this not work then I will think about go with that.

[Hassan1991]

mention the ecu you got and engine.
unstable rpm can also be caused by TPS and IAC.

[hasankhurshid29]

buy an ELM327 OBD II Scanner Adapter (not so

It will not work on this car. Firstly it has a 3 pin connector. Secondly these chinese scanner don't have support for this ecu. I already tried. So I have bought hondash which is especially designed for this car. You can check at hondash.net

[shabbir.1]

First try to lend a known good ecu from any of your acquaintances and try that in your car to check the issues you are facing right now.

Secondly read all codes showing up in your car and rectify those one by one.
Codes can be read either through a scanner or you can jump the 2 pin "Service Check Connector" located near the ecu and read the codes by counting the blinking pattern of MIL/CEL in the instrument cluster.

[kashif91ahmed]

Yes he mentioned these 2 words also when he is explaining me the issue.

[Hassan1991]

Where?

[kashif91ahmed]

The computer guy told me when he fix TPS the other thing start making issue when he fix IAC the other start making issue.

[Hassan1991]

He should manually check all the wiring with multimeter first.
And i asked about engine and ecu name.