PROBLEM With EGR system & a/f ratio ! ! ! - Fuelly Forums

Click here to see important news regarding the aCar App

Reply
 
Thread Tools Display Modes
 
Old 08-05-2008, 05:40 AM   #1
Registered Member
 
Join Date: Jan 2008
Posts: 14
Country: United States
Thumbs down PROBLEM With EGR system & a/f ratio ! ! !

civic 94, d15z1 vx (vei vtec-e)

problem #1
when i disconecting EGR velve sensor & EGR control solenoid valve, check engine does not Light On is it normal?



problem #2
engine work on rich A/C mixture, it can see on spark plugs (i replaced spark plugs many times) now standing ZFR4F-11 (NGK)

problem #3
engine lose power, it feels good when i ride at hi rpm.

problem #4
Fuel consumption 9-10 litres/100 km (23 MPG) in city. hwy (30 mpg)

replaced:
oxygen sensor.
map sensor.
throttle angel sensor.
new changed oil in engine & gear box (+ oil filter)
AIR filter
OIL filter
Fuel filter
Ignition Timing is ok

please tell me all reasons on this problems
__________________

usaqmuri is offline   Reply With Quote
Old 08-05-2008, 12:27 PM   #2
Registered Member
 
jadziasman's Avatar
 
Join Date: Jan 2007
Posts: 324
Country: United States
Very poor fuel economy indeed.

Possibilities:

1) Leaking fuel tank.
2) VTEC solenoid valve is stuck closed - 4 valve per cylinder operation full time.
3) Very bad misfire condition - either too much air, too much fuel, or weak ignition (spark).
4) Engine problem - check cylinder compression and leakdown.
5) Parking brake not disengaging (unlikely).
__________________

jadziasman is offline   Reply With Quote
Old 08-05-2008, 01:46 PM   #3
Registered Member
 
Join Date: Jan 2008
Posts: 14
Country: United States
fuel tank checked and not leaked.
compression is (9.15 kg/cm). 130 PSI
Parking brakes is not a reason. i know this 100%

what about VTEC solenoid? please tell me how i can see valve is stuck closed or not?

p.s.
i interested more about first problem
symptoms starting when engine has warmed up to normal operating temperature
usaqmuri is offline   Reply With Quote
Old 08-05-2008, 04:53 PM   #4
Registered Member
 
Join Date: Feb 2007
Posts: 244
Country: United States
Quote:
Originally Posted by usaqmuri View Post
civic 94, d15z1 vx (vei vtec-e)
problem #3
engine lose power, it feels good when i ride at hi rpm.
Sounds like a similar problem I had in my former '95 VX. The enine ran fine until it got to operating temperature. Then the check engine light came on. When I accelerated slowly or when cruising at a steady speed, it lost power and bucked. Under hard acceleration, it felt fine. My Honda mechanic friend advised me it was likely clogged EGR ports. Rather than removing the intake manifold to clean the ports, he told me to disconnect the vacuum hose coming from the EGR valve (I think there was a T connector with two other hoses joining at the T) and insert a broken golf tee (without the head) into the line and reconnect it. This solved the problem and the car ran fine afterwards. The hose I'm referring to was found somewhere between the passenger side of the valve cover and the throttle body (somewhere near the red circle in your second picture).
__________________
cems70 is offline   Reply With Quote
Old 08-06-2008, 12:47 PM   #5
Registered Member
 
GasSavers_bobski's Avatar
 
Join Date: May 2007
Posts: 463
Country: United States
For starters, it looks to me like you have your vacuum lines connected wrong. The diagram I have shows a line going from the intake manifold to the middle port of the CVC valve (the green and white thing). There should be a line going from the other CVC valve port to the bottom port of the EGR solenoid valve (the one you have circled in your first pic). The remaining solenoid valve port gets connected to the EGR valve.

Does the check engine light come on for about 2 seconds when you switch the ignition on? If not, the bulb could have burnt out, or someone may have removed it to make the car easier to sell.

Are you sure you have the proper ECU?
GasSavers_bobski is offline   Reply With Quote
Old 08-06-2008, 02:55 PM   #6
Registered Member
 
Join Date: Jan 2008
Posts: 14
Country: United States
Does the check engine light come on for about 2 seconds when you switch the ignition on?

when i switch the ignition, check engine light come on 2 -3 second.
about ECU i dont know. which mark must be?
you think what its not original ECU? tomorrow I inspect
+ clutch disc inspected and no problem

this problem does not appear always but often.
usaqmuri is offline   Reply With Quote
Old 08-06-2008, 05:18 PM   #7
Registered Member
 
GasSavers_bobski's Avatar
 
Join Date: May 2007
Posts: 463
Country: United States
Quote:
Originally Posted by usaqmuri View Post
about ECU i dont know. which mark must be? you think what its not original ECU?
If this is a US market VX, it should have a P07 ECU. I'm not sure about other markets. If the ECU has been swapped out for one from a non-EGR equipped car, it would explain the lack of EGR error codes.
GasSavers_bobski is offline   Reply With Quote
Old 08-06-2008, 06:53 PM   #8
Registered Member
 
VetteOwner's Avatar
 
Join Date: Mar 2007
Posts: 1,546
Country: United States
yea sounds liek a bad egr to me. my s-10 used to buck at low gears at low speeds (where it shouldnt buck) and the mpg never varied from 25. i could gun it everywhere, interstate trips, slow accel, etc but wouldnt vary, plugged it and mpg instantly shot up.
VetteOwner is offline   Reply With Quote
Old 08-06-2008, 09:26 PM   #9
Registered Member
 
GasSavers_JoeBob's Avatar
 
Join Date: Oct 2007
Posts: 698
Country: United States
Question...why are you disconnecting the EGR in the first place?
__________________
"We are forces of chaos and anarchy. Everything they say we are we are, and we are very proud of ourselves!" -- Jefferson Airplane

Dick Naugle says: 1. Prepare food fresh. 2. Serve customers fast. 3. Keep place clean.



GasSavers_JoeBob is offline   Reply With Quote
Old 08-07-2008, 02:13 AM   #10
Registered Member
 
Join Date: Jan 2008
Posts: 14
Country: United States
Quote:
Originally Posted by JoeBob View Post
Question...why are you disconnecting the EGR in the first place?
since I cleaned EGR system & valve
__________________

usaqmuri is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 07:21 PM
Not getting impressive fuel economy with the Civic DUBPL8 General Maintenance and Repair 31 08-25-2007 04:12 PM
Things To Look For When Buying A Civic Hx panamacolin General Fuel Topics 9 06-06-2007 08:43 AM
im going to the track on thursday. anybody want to place some bets? thisisntjared General Discussion (Off-Topic) 14 04-14-2006 09:21 AM
Scan gauge Tank MPH Avg zpiloto General Fuel Topics 5 03-22-2006 02:32 PM

» Fuelly iOS Apps
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 03:52 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.