SaturnFans.com
what's new (beta) - classifieds - forums - photos


Go Back   SaturnFans.com Forums > Models > Saturn L-Series > L-Series Tech
Register FAQ Members List Groups Calendar Chat Room Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
Old 12-28-2008, 12:29 PM   #1
rjmotor
New Member
rjmotor is on a distinguished road
 
Join Date: Dec 2008
Posts: 5
Default 2000 LS2 Code 300 Random Misfire

2000 LS2 4 cyl have a Code 300 Random Misfire. Changed the plugs SES came back on with same code also the fan engaged at the same time with the engine cool. Ive read that a lot of the misfire problems are from the ignition control module could that be my problem? If so why would the fan engage before the engine warmed up.

Last edited by rjmotor; 12-28-2008 at 12:38 PM..

REWARD EXCELLENCE!

Add to rjmotor's Reputation
Rate the quality of this post and help rjmotor reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
rjmotor is offline   Reply With Quote
SaturnFans.com Sponsored Links
Old 12-28-2008, 01:24 PM   #2
fdryer
Super Member
fdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant future
 
fdryer's Avatar
 
Join Date: Jan 2006
Location: NYC
Posts: 29,791
 

2003 L-Series 3.0L Sedan
Default Re: 2000 LS2 Code 300 Random Misfire

Check for any TSB's about early ignition control module failures.

REWARD EXCELLENCE!

Add to fdryer's Reputation
Rate the quality of this post and help fdryer reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
fdryer is online now   Reply With Quote
Old 12-28-2008, 03:52 PM   #3
rjmotor
New Member
rjmotor is on a distinguished road
 
Join Date: Dec 2008
Posts: 5
Default Re: 2000 LS2 Code 300 Random Misfire

There was a recall for the ignition control module for 2000 L series I called Saturn but my car was not involved

REWARD EXCELLENCE!

Add to rjmotor's Reputation
Rate the quality of this post and help rjmotor reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
rjmotor is offline   Reply With Quote
Old 12-28-2008, 09:24 PM   #4
fdryer
Super Member
fdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant future
 
fdryer's Avatar
 
Join Date: Jan 2006
Location: NYC
Posts: 29,791
 

2003 L-Series 3.0L Sedan
Default Re: 2000 LS2 Code 300 Random Misfire

Whether the fan running simultaneously with misfiring is one symptom or two separate issues may be difficult to troubleshoot. If a scanner/reader can be used, this may help isolate and pinpoint where problem(s) lie. Normally replacing ignition components are called for here but if you have a separate ignition coil assembly and ignition control module, it can be expensive to replace both. You can take basic measurements of the ignition coils to check for shorted coils but that's about all you can do other than looking for cracks in the molded assembly revealing high voltage leaks shorting to the engine instead of jumping the plug gaps. No published information on the ignition control module. Perhaps used parts will reduce the costs of parts substitution.

REWARD EXCELLENCE!

Add to fdryer's Reputation
Rate the quality of this post and help fdryer reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
fdryer is online now   Reply With Quote
Old 12-29-2008, 02:02 AM   #5
Ex-GMtech
Advanced Member
Ex-GMtech is on a distinguished road
 
Join Date: Jun 2007
Location: Akron, Ohio
Posts: 508

2000 L-Series 3.0L Wagon
Default Re: 2000 LS2 Code 300 Random Misfire

Quote:
Originally Posted by rjmotor View Post
There was a recall for the ignition control module for 2000 L series I called Saturn but my car was not involved
That doesn't mean it has a good one in it. The modules and coils have been iffy on the earlier cars(2000-2002 roughly). The plug boots have been known to crack and cause misfires too.

...
OMG this car is easy to work on!

2000 LW2
1998 Intrigue
1996 Caprice
1994 88
1986 GLHS

REWARD EXCELLENCE!

Add to Ex-GMtech's Reputation
Rate the quality of this post and help Ex-GMtech reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
Ex-GMtech is offline   Reply With Quote
Old 12-29-2008, 05:14 PM   #6
rjmotor
New Member
rjmotor is on a distinguished road
 
Join Date: Dec 2008
Posts: 5
Default Re: 2000 LS2 Code 300 Random Misfire

Diid a vacuum check, reading was fluctuating quickly between 17 and 18 indicating misfire.Plug boots look good. I decided to take a chance and change the ignition module ($106 from Saturn) Unfortunatly for me there was no change still have the 300 misfire code with the fan engaging before the engine warms up. There has to be a coraltion between the two since both started together a few days ago when the SES came on.

REWARD EXCELLENCE!

Add to rjmotor's Reputation
Rate the quality of this post and help rjmotor reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
rjmotor is offline   Reply With Quote
Old 12-29-2008, 06:55 PM   #7
fdryer
Super Member
fdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant future
 
fdryer's Avatar
 
Join Date: Jan 2006
Location: NYC
Posts: 29,791
 

2003 L-Series 3.0L Sedan
Default Re: 2000 LS2 Code 300 Random Misfire

Just to cover the basics, be sure that your coolant sensor is exactly like the ones below to eliminate a sensor related problem. Look at the brass portion that won't be hidden when screwed into the engine and compare your's with these pictures (profiles). The plastic portion is the electrical connection and is crimped into the brass body. Theoretically, the older resin tipped sensors cracked in the S-series and caused rich running conditions and the L-series used the new style brass ones but if you have the older resin one its tip isn't brass and blunt nosed but has a rounded nose instead. Disconnection of this sensor may cause the fan to turn on immediately when the ignition is turned on. Another possibility would be the fan relay contacts sticking so substituting it with another one may stop the fan running. Tapping on the relay with some force may unstick the relay too. A sharp rap with a screwdriver smacking the relay. If the fan continues to run even with another relay in place you'll need a wiring diagram to troubleshoot further. One of several conditions is causing the fan to run; the PCM senses hot engine coolant, the a/c system is ON, a default condition has been met forcing the fan to run. Figuring out this default condition would be listed in the FSM. The misfiring may be one hint of this condition.

If you can remove the fan relay or disconnect the fan electrical connectors to allow a near normal engine warm-up, what does the temperature gauge indicate after a reasonable time for warm-up? 1/4, 3/8, 1/2, or 3/4? What was the temperature indication before this problem occurred?

Is there a chance an air leak has occurred around the intake manifold, a broken vacuum line, etc.? Replaced anything other than plugs? The random misfire may be caused by a lean air/fuel mixture either from low fuel pressure or a vacuum leak disrupting the ideal air/fuel mixtures so ignition may be take place erratically. This then won't be from the ignition system.

When first starting, did the engine idle high around 1200-1500 rpm and gradually return to idle as it warmed up?
Attached Images
File Type: jpg coolant sensor.jpg (14.2 KB, 10 views)
File Type: jpg 2000 temperature sensor.jpg (13.3 KB, 8 views)
File Type: jpg 2000 coolant sensor.jpg (6.9 KB, 7 views)

REWARD EXCELLENCE!

Add to fdryer's Reputation
Rate the quality of this post and help fdryer reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
fdryer is online now   Reply With Quote
Old 01-01-2009, 10:33 AM   #8
rjmotor
New Member
rjmotor is on a distinguished road
 
Join Date: Dec 2008
Posts: 5
Default Re: 2000 LS2 Code 300 Random Misfire

Made a mistake and drove the car to work (30 miles) Got in ok but on the way home it died on the highway. Can anyone guess what it was all along? You got it the dreaded TIMING CHAIN. Car has 108000 miles Im debating whether to tackle the repair or not.

REWARD EXCELLENCE!

Add to rjmotor's Reputation
Rate the quality of this post and help rjmotor reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
rjmotor is offline   Reply With Quote
Old 01-01-2009, 11:54 AM   #9
fdryer
Super Member
fdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant futurefdryer has a brilliant future
 
fdryer's Avatar
 
Join Date: Jan 2006
Location: NYC
Posts: 29,791
 

2003 L-Series 3.0L Sedan
Default Re: 2000 LS2 Code 300 Random Misfire

Sorry to read about yours having a timing chain failure. The first sticky thread in this forum covers the timing chain; http://www.saturnfans.com/forums/showthread.php?t=72096

REWARD EXCELLENCE!

Add to fdryer's Reputation
Rate the quality of this post and help fdryer reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
fdryer is online now   Reply With Quote
Old 01-02-2009, 11:34 AM   #10
rjmotor
New Member
rjmotor is on a distinguished road
 
Join Date: Dec 2008
Posts: 5
Default Re: 2000 LS2 Code 300 Random Misfire

There are a couple of problems with that Thread, The pictures dont load and he talks about a walkthrough but there is none posted.

REWARD EXCELLENCE!

Add to rjmotor's Reputation
Rate the quality of this post and help rjmotor reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
rjmotor is offline   Reply With Quote
Old 01-02-2009, 02:42 PM   #11
KLS1P
Member
KLS1P is on a distinguished road
 
Join Date: Jan 2009
Location: I80 and Rt 43
Posts: 262

2000 L-Series 2.2L Sedan
2004 L-Series 3.0L Sedan
Default Re: 2000 LS2 Code 300 Random Misfire

This may be a moot point since your timing chain failed, but i had the same misfire a while back. The fix was replacing the coil pack above the spark plugs and not the ignition module. This was found by my neighbor who had the GM scan tool, which showed a real time misfire condition. The ignition module was already replaced for a recall. The coil pack is a standard GM part and used on a lot of gm cars with the ecotech engine, the saturn dealer was $75 bucks more for the same part that fits a chevy cavalier. Keep us posted about the chain, I have 2000 4cyl LS1 with 140k, knock on wood, no chain probs.

REWARD EXCELLENCE!

Add to KLS1P's Reputation
Rate the quality of this post and help KLS1P reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
KLS1P is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2000 sc1 misfire code julibill S-Series Tech 5 03-21-2009 06:28 AM
2000 LS2 v6 bank1 sensor1 code SuperSatLS2 L-Series Tech 1 03-15-2009 11:43 PM
2000 ls2 v6 POO50 CODE HEATED O2 SENSOR SuperSatLS2 L-Series Tech 7 09-22-2008 08:44 PM
2000 LS2 Service Code P0030 finder216 L-Series Tech 5 07-29-2006 04:27 PM
2000 LS2 Radio Unlock Code Kmae83 L-Series Tech 5 05-22-2006 11:37 AM


All times are GMT -5. The time now is 10:13 AM.

Advanced Forum Search | Advanced Photo Search


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SaturnFans.com. The Saturn Enthusiasts Site.