00 civic ex misfires - Honda-Tech - Honda Forum Discussion

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

00 civic ex misfires

Old 04-15-2018, 03:47 PM
  #1  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default 00 civic ex misfires

Hello all, i have my 00 civic ex with the stock d16y8, it has a cai header back exhaust and an adjustable fuel pressure regulator. Thats it for mods. When i cold start it it misfires for 15-20 seconds. I have cel for all 4 random misfires code 71 72 73 and 74 i believe. This started this winter when we had very cold weather -20 -30 or so. Ive done a complete tune up including fuel filter and just recently replaced the coil. The car smells it is running rich and my gas milage is worse then it should be.
After starting it when its cold if i let it idle, after 4 or 5 minutes it starts to idle like it is cammed.
Sometimes while driving normal (just cruising) holding at 1/8 to 1/4 throttle it will cut out like i let off the throttle. If i let off the throttle and push it again it is fine. Is this possibly tps related? This one kinda has me stumped so hopefully all the info i gave you somebody can chime in
Hondaman4life66 is offline  
Old 04-15-2018, 08:03 PM
  #2  
Stancetard Hate Monger
iTrader: (1)
 
eghatch9295's Avatar
 
Join Date: Aug 2004
Location: cleveland, oh, usa
Posts: 3,329
Default Re: 00 civic ex misfires

verify mechanical timing, distributor also possibly faulty.
eghatch9295 is offline  
Old 04-16-2018, 01:34 AM
  #3  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

Both mechanical and ignition timing is dead on. That was one of my first thoughts was timing.
Also if i blip the throttle the rpms actually drop slightly before revving up. Ive checked about everything i know to check with these symptoms so you think something else in the dizzy might be screwy?
i havnt checked the tps readings yet, do any of these symptoms sound tps related?
Hondaman4life66 is offline  
Old 04-16-2018, 04:52 AM
  #4  
Loves Tossing Salad
 
09chaplak's Avatar
 
Join Date: Mar 2014
Location: Uh, uh DIPSY
Posts: 902
Default Re: 00 civic ex misfires

Sounds like a fuel issue to be honest. What's up with the regulator? Did you install this?
09chaplak is offline  
Old 04-16-2018, 06:56 AM
  #5  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

Yes i installed the fpr. Its a blox adjustable, the type you adapt to the oem fpr. And i have a b&m gauge. I tried different psi's to see if anything changed but no dice.
Another thought i had is it possibly an injector issue? Im getting misfire on all four cylinders so it has to be something to do with all of them. I highly doubt its lacking fuel because it definitely smells rich and almost chokes out taking off at low rpms
Hondaman4life66 is offline  
Old 04-16-2018, 07:26 AM
  #6  
Loves Tossing Salad
 
09chaplak's Avatar
 
Join Date: Mar 2014
Location: Uh, uh DIPSY
Posts: 902
Default Re: 00 civic ex misfires

Was this issue present before the regulator was installed?
09chaplak is offline  
Old 04-16-2018, 07:52 AM
  #7  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

No this issue showed up about6 months after the regulator
Hondaman4life66 is offline  
Old 04-16-2018, 07:57 AM
  #8  
Loves Tossing Salad
 
09chaplak's Avatar
 
Join Date: Mar 2014
Location: Uh, uh DIPSY
Posts: 902
Default Re: 00 civic ex misfires

Do you still have the OEM regulator?

I think you can see where I'm going with this.
09chaplak is offline  
Old 04-16-2018, 08:01 AM
  #9  
Loves Tossing Salad
 
09chaplak's Avatar
 
Join Date: Mar 2014
Location: Uh, uh DIPSY
Posts: 902
Default Re: 00 civic ex misfires

re-read previous post, remove the adjustable and see if you still have the same problems.
09chaplak is offline  
Old 04-16-2018, 08:08 AM
  #10  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

Nope the blox you cut the oem and adapt the top piece to the oem fpr. Its still technically the oem its just adjustable.
now that you mention this i am going to take a look at it after work maybe the seal went bad.
Hondaman4life66 is offline  
Old 04-16-2018, 11:08 AM
  #11  
Honda-Tech Member
 
Join Date: Feb 2016
Posts: 2,408
Default Re: 00 civic ex misfires

The adjustable fuel pressure regulator is a classic example of a solution in search of a problem.

Put a stock one on. Make sure the compensator vacuum hose is hooked up to the intake.
mk378 is offline  
Old 04-16-2018, 11:28 AM
  #12  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

The adjustable fuel pressure regulator is used to fine tune your air fuel ratio if one runs a wideband gauge. It has/had absolutely nothing to do with fixing any problems for me. Thanks for the 2 cents though thats just not the case here
Hondaman4life66 is offline  
Old 04-16-2018, 11:32 AM
  #13  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

Im not sure if you didn't read all my above posts but i feel i need to clarify. The blox fpr has been on the car since waaaaay before this problem arose
Hondaman4life66 is offline  
Old 04-16-2018, 12:03 PM
  #14  
Loves Tossing Salad
 
09chaplak's Avatar
 
Join Date: Mar 2014
Location: Uh, uh DIPSY
Posts: 902
Default Re: 00 civic ex misfires

Process of elimination, you don't have to do it but I would at least rule it out.
09chaplak is offline  
Old 04-16-2018, 12:27 PM
  #15  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

Of course, i am going to take a look at it. I will keep you posted thanks
Hondaman4life66 is offline  
Old 04-16-2018, 12:34 PM
  #16  
Honda-Tech Member
 
Join Date: Feb 2016
Posts: 2,408
Default Re: 00 civic ex misfires

The regulator could be leaking and sending raw gas through the vacuum line, which of course will cause running rich / flooding out.

If you insist on keeping the adjustable regulator, at least set it to stock pressure.
mk378 is offline  
Old 04-17-2018, 02:15 AM
  #17  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

I didn't get a chance to check it out yesterday we had a freezing rain storm. My vacuum line from the fpr to the manifold is see through so i didn't see any raw gas going through. I will update either way after i get a chance to check it out.
Hondaman4life66 is offline  
Old 04-17-2018, 11:10 PM
  #18  
Stancetard Hate Monger
iTrader: (1)
 
eghatch9295's Avatar
 
Join Date: Aug 2004
Location: cleveland, oh, usa
Posts: 3,329
Default Re: 00 civic ex misfires

still sounds distributor related.
eghatch9295 is offline  
Old 04-21-2018, 08:30 AM
  #19  
Honda-Tech Member
Thread Starter
 
Join Date: Apr 2018
Location: Maine bruh
Posts: 33
Default Re: 00 civic ex misfires

Just an update no dice with the fpr. Im going to check the tps today and i have a different dizzy to swap to from a running car.
Hondaman4life66 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
v8killaz
Honda Civic / Del Sol (1992 - 2000)
9
02-26-2011 03:40 PM
topdownta
Honda Civic / Del Sol (1992 - 2000)
1
08-12-2008 04:04 AM
92EG8
Honda Civic / Del Sol (1992 - 2000)
18
04-16-2008 09:59 AM
barney510
Honda Civic / Del Sol (1992 - 2000)
2
09-30-2006 04:24 PM
Carlito Brigante
Tech / Misc
11
12-13-2002 05:58 AM


Thread Tools
Search this Thread
Quick Reply: 00 civic ex misfires


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 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: