99 Galant po300 - Mitsubishi Forum - Mitsubishi Enthusiast Forums


Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 01-30-2009, 09:36 PM
Thread Starter
 
Join Date: Jan 2009
Posts: 11
Default 99 Galant po300

Replaced valve cover gasket and spark plug tube seals. Tubes were oil soaked. Two weeks later got a misfire code (po300 random misfire). Replaced plugs and still have a misfire code after car gets to operating temp on freeway. Mainly after stop and go. Tach is also jumping around and sometimes dropping to zero.
Reply With Quote
  #2  
Old 01-31-2009, 12:14 PM
dsm1990gsx's Avatar
Super Moderator
 
Join Date: Oct 2007
Location: Pottstown, Pa
Posts: 4,681
Default RE: 99 Galant po300

Did you replace the spark plug wires too?
Reply With Quote
  #3  
Old 01-31-2009, 07:03 PM
Thread Starter
 
Join Date: Jan 2009
Posts: 11
Default RE: 99 Galant po300

I have not replaced the wires. I checked on them and there are only two. The other two cylinders are the coils. $75 for two wires and $107 per coil. I have been hesitent on replaceing due to price. If I was getting a po301,302,303, or 304 code? I would at least know if it was a coil cyl. or wire cyl.
Reply With Quote
  #4  
Old 01-31-2009, 07:21 PM
dsm1990gsx's Avatar
Super Moderator
 
Join Date: Oct 2007
Location: Pottstown, Pa
Posts: 4,681
Default RE: 99 Galant po300

Does it idle rough, check for vacuum leaks.
Reply With Quote
  #5  
Old 01-31-2009, 07:45 PM
Thread Starter
 
Join Date: Jan 2009
Posts: 11
Default RE: 99 Galant po300

No, It only has problems 7-10 miles down the freeway after it gets to operating temp. Cold and around town it is fine. Plus, isn't the tach. ran threw the coils? It is jumping around and sometimes stays at zero.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2005 Outlander fault code PO300 gordonsen Mitsubishi Outlander 2 08-24-2013 09:18 AM
Help!! po300 jay_yrbrgh Mitsubishi Galant 14 02-04-2009 09:18 PM
po300 xslim69 Everything else 2 12-09-2006 08:49 PM
anyone looking Brand new galant or 2nd galant DAVEMOTOR Mitsubishi Galant 13 01-04-2006 06:25 PM
98 galant 4g63t swap!!!! help me guys im tryin to make my new galant badass BigSteve0034 Mitsubishi Galant 1 05-20-2005 02:42 PM


Tags
01, 99, codes, de, eclipse, endeavor, galant, mercury, mitsub, mitsubishi, oil, plug, po300, sable, spark, tube

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 03:35 AM.