Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Civic 2000 (D15Z6) Fuel Issues

 
Old 07-12-2019, 06:49 AM
  #51  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

This ecu is not for this engine but still it is working. Does this the reason that I am getting that bad fuel economy? Only 4.5km per litre.
Hasan Khurshid is offline  
Old 07-12-2019, 07:28 AM
  #52  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
This ecu is not for this engine but still it is working. Does this the reason that I am getting that bad fuel economy? Only 4.5km per litre.
It's part of the problem. But why would you ignore code 3? This code will make the engine run very poorly.
muellersfan is offline  
Old 07-12-2019, 07:57 AM
  #53  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post
It's part of the problem. But why would you ignore code 3? This code will make the engine run very poorly.
This code as I previously said it only came when accelerating on cng. CEL never comes on in any situation on petrol but I will still check the wiring soon.
Hasan Khurshid is offline  
Old 07-12-2019, 09:14 AM
  #54  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
This code as I previously said it only came when accelerating on cng. CEL never comes on in any situation on petrol but I will still check the wiring soon.
Code 3 is an electrical issue. It would not matter whether you are running cng or petrol.
muellersfan is offline  
Old 07-13-2019, 07:47 AM
  #55  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post
Code 3 is an electrical issue. It would not matter whether you are running cng or petrol.
I have checked the map sensor wire. It is coming from the engine harness and no alteration has been done. The most left pin gives 5V and the most right pin gives around 3.8V when the ignition is on. The center pin does not give any volts

I started the engine without plugging in. The engine was running very bad and cel turns on.

Means the sensor is working.
Hasan Khurshid is offline  
Old 07-13-2019, 07:52 AM
  #56  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Now my priority is to get the cooling system proper thermostat and auto radiator fan so that engine runs on optimum temp. Because I get to know that the ecu installed in my car is the stock one and it does not have O2 sensor capabilities instead it uses a fuel trim pot potionmeter to get the fuel mixture

But it only takes that signal if the car reaches optimum temp otherwise the ecu runs the car rich.

So for now my main problem is the thermostat and the fan switch needs replacement and I have to remove the paper clip in the fan switch socket.

Thanks
Hasan Khurshid is offline  
Old 07-13-2019, 11:48 AM
  #57  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
instead it uses a fuel trim...potionmeter to get the fuel mixture
Haha...this^ is also referred to as an O2 sensor.
muellersfan is offline  
The following users liked this post:
Old 07-13-2019, 11:52 AM
  #58  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post
Haha...this^ is also referred to as an O2 sensor.
It is different than o2 sensor as you can manually adjust the fuel mixture whereas o2 sensor is present on the exhaust mani. and the signal generate is send to ecu determine the mixture

Whereas trim pot signals remains same and can only be manually adjusted and it is present near driver side kick panel.

The o2 sensor is more efficient in maintaing the mixture but in Pakistan we always are behind the world. Because all the jdm edm usdm 6th gen civic has O2 sensor but we didn't have
Hasan Khurshid is offline  
Old 07-13-2019, 11:54 AM
  #59  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
It is different than o2 sensor as you can manually adjust the fuel mixture whereas o2 sensor is present on the exhaust mani. and the signal generate is send to ecu determine the mixture

Whereas trim pot signals remains same and can only be manually adjusted and it is present near driver side kick panel.

The o2 sensor is more efficient in maintaing the mixture but in Pakistan we always are behind the world. Because all the jdm edm usdm 6th gen civic has O2 sensor but we didn't have


Interesting. I love learning new things. Please post some pictures of the device.
muellersfan is offline  
The following users liked this post:
Old 07-13-2019, 12:01 PM
  #60  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post


Interesting. I love learning new things. Please post some pictures of the device.
I also got to know that 7th gen civic here also don't have O2 sensor. These info I am getting from Pakwheels forum and they agreed that for my car I need to change the ecu to match the engine but first the cooling system should be proper.
Hasan Khurshid is offline  
Old 07-13-2019, 12:14 PM
  #61  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post


Interesting. I love learning new things. Please post some pictures of the device.



Here is a person explaining the civics in Pakistan on civicclub. We also don't have 16 pin obd connector in my 2000 civic. Secondly have you heard of my ecu P2M? I think no becuase it only came here
Hasan Khurshid is offline  
Old 07-13-2019, 01:17 PM
  #62  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Cool
muellersfan is offline  
Old 07-13-2019, 01:24 PM
  #63  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post
Cool
I will update you guys as I move forward. My first attack will be on the cooling system, replacing the bad fan switch and checking the thermostat and replacing tap water with good quality coolant so that engine always run at optimum temperature

I have learnt from you people and will continue learning from you guys.

I will try to keep you updated.

Thanks
muellersfan
mk378
tony_2018
Hasan Khurshid is offline  
Old 07-15-2019, 02:29 AM
  #64  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post
The problem is almost surely a bad sending unit. To verify, turn key to ON(II) and then ground the low fuel light wire of the sending unit to the chassis. Does the light turn on?




I have performed all the test given in the service manual. Everything is fine but when I plug it in the low fuel indicator does not light up whereas on jumping the black and green wire it lights up


Hasan Khurshid is offline  
Old 07-15-2019, 02:31 AM
  #65  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

The resistance is also 113 means the sending unit is working
And it's the japanese type
Hasan Khurshid is offline  
Old 07-15-2019, 04:29 AM
  #66  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
The resistance is also 113 means the sending unit is working
And it's the japanese type
Fuel guage is controlled by the center pin (Pin 2 YLW/BLK) so why when we short green and black the fuel guage starts too get low and low fuel light turns on.
Means can anyone explain how the sending unit works?

mk378
muellersfan
tony_2018
Hasan Khurshid is offline  
Old 07-15-2019, 05:41 AM
  #67  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
I have performed all the test given in the service manual. Everything is fine but when I plug it in the low fuel indicator does not light up whereas on jumping the black and green wire it lights up
Originally Posted by Hasan Khurshid View Post
Fuel guage is controlled by the center pin (Pin 2 YLW/BLK) so why when we short green and black the fuel guage starts too get low and low fuel light turns on.
Means can anyone explain how the sending unit works?
Replace the fuel sending unit.
muellersfan is offline  
Old 07-15-2019, 05:42 AM
  #68  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 1,321
Received 36 Likes on 35 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by Hasan Khurshid View Post
I have performed all the test given in the service manual. Everything is fine but when I plug it in the low fuel indicator does not light up whereas on jumping the black and green wire it lights up
Originally Posted by Hasan Khurshid View Post
Fuel guage is controlled by the center pin (Pin 2 YLW/BLK) so why when we short green and black the fuel guage starts too get low and low fuel light turns on.
Means can anyone explain how the sending unit works?
Replace the fuel sending unit. Then go from there.
muellersfan is offline  
Old 07-20-2019, 04:28 AM
  #69  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by muellersfan View Post
Replace the fuel sending unit. Then go from there.



Here is how the fuel trim potentiometer looks like in my civic. Using a screw driver you can adjust the air fuel mixture
Hasan Khurshid is offline  
Old 07-20-2019, 04:31 AM
  #70  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues



Does anyone know the thread diameter of temp sending unit for cluster gauge? I want to attach a T here and add 1 more sensor
Hasan Khurshid is offline  
Old 07-20-2019, 08:30 PM
  #71  
Honda-Tech Member
 
Join Date: Jan 2013
Location: The South - Roll Tide !!!
Posts: 3,536
Likes: 0
Received 6 Likes on 6 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

1/8" NPT.
JRCivic1 is offline  
Old 07-21-2019, 12:22 AM
  #72  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2019
Location: Pakistan
Posts: 81
Received 0 Likes on 0 Posts
Default Re: Civic 2000 (D15Z6) Fuel Issues

Originally Posted by JRCivic1 View Post
1/8" NPT.
I think that is for ect sensor which is neighbouring to the guage sebding unit
Hasan Khurshid is offline  

Thread Tools
Search this Thread

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: