1st Generation This includes all Eclipses, Talons, and Lasers built from 1990-1994.

Misfire comes and goes?

  #1  
Old 04-22-2009, 11:22 AM
Member
Thread Starter
Join Date: Nov 2007
Location:
Posts: 44
Default Misfire comes and goes?

Its a 93 eclipse with 1.8L and 5 speed. Cranks and runs fine, when you are accelerating or cruising at constant speed it will start missing on one or two cylinders, then go right back to running fine. So far I have changed the following trying to fix this:

plugs
coil
distributor
o2 sensor
fuel filter
put injector cleaner in the tank.

I have an aftermarket fuel pump and tank, which have worked well for about 15K miles so that isnt the problem. It does burn oil, but seems to clear up after it gets running. when its running right, its great, I just cant figure out what is making it run like crap when it does. Any ideas?
 
  #2  
Old 04-22-2009, 03:39 PM
dsm1990gsx's Avatar
Super Moderator
Join Date: Oct 2007
Location: Pottstown, Pa
Posts: 4,681
Default

I didnt see wires on your list did you replace them too?
 
  #3  
Old 04-23-2009, 11:05 AM
Member
Thread Starter
Join Date: Nov 2007
Location:
Posts: 44
Default

they are about a year old, I replaced them before all this started.

I'm thinking it may be injectors, can you clean these suckers out or what?
 
  #4  
Old 04-23-2009, 06:32 PM
dsm1990gsx's Avatar
Super Moderator
Join Date: Oct 2007
Location: Pottstown, Pa
Posts: 4,681
Default

You can try cleaning them w/ fuel injector cleaner but idk how well that stuff works.
 
  #5  
Old 04-23-2009, 08:39 PM
Senior Member
Join Date: Mar 2009
Location: NOT HERE
Posts: 124
Default

Just make sure you get new seals before pulling those injectors so you have them ready.
 
  #6  
Old 04-24-2009, 09:35 AM
Senior Member
Join Date: Jul 2008
Posts: 144
Default

Check the spark plugs and check the Burn on the plugs and check the chart on how to read them. Any Haynes book has a pictures of different spark plug burn on the back of their manuals.

You get them on Pep Boys or on line. or post the pic here of the spark plug or plugs.

different burn has different meaning
 
  #7  
Old 04-24-2009, 01:34 PM
dsm1990gsx's Avatar
Super Moderator
Join Date: Oct 2007
Location: Pottstown, Pa
Posts: 4,681
Default

Can you get the car to miss at idle? What brand of wires do you have?
 
  #8  
Old 04-27-2009, 10:19 PM
Member
Thread Starter
Join Date: Nov 2007
Location:
Posts: 44
Default

It is running lean according to the way the plugs look. It is bone white, no trace of tan at all. I noted this when I changed the plugs. It will miss at idle, at speed or while accelerating, but not all the time. It comes and goes with no reason that I can tell. it'll go for 20 miles or so no problems, then it'll start missing all the sudden, then stop.
 
  #9  
Old 04-27-2009, 11:21 PM
Senior Member
Join Date: Mar 2009
Location: NOT HERE
Posts: 124
Default

Originally Posted by Michael Knight View Post
It is running lean according to the way the plugs look. It is bone white, no trace of tan at all. I noted this when I changed the plugs. It will miss at idle, at speed or while accelerating, but not all the time. It comes and goes with no reason that I can tell. it'll go for 20 miles or so no problems, then it'll start missing all the sudden, then stop.
it can be numerous things man.....Carbon build up,Spark etc....
 
  #10  
Old 04-28-2009, 11:50 AM
dsm1990gsx's Avatar
Super Moderator
Join Date: Oct 2007
Location: Pottstown, Pa
Posts: 4,681
Default

Originally Posted by Blck3G View Post
it can be numerous things man.....Carbon build up,Spark etc....
Hes running lean so I'd assume its fuel related. A spark issue would foul a plug out.

Try checking fuel pressure and see what it reads when its missing.
 

Thread Tools
Search this Thread
Quick Reply: Misfire comes and goes?


Contact 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.