- classifieds - forums

Go Back Forums > Models > Saturn S-Series > S-Series Tech

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 06-22-2008, 11:27 PM   #1
3500srw is on a distinguished road
3500srw's Avatar
Join Date: Mar 2008
Location: Southern, WI
Posts: 84

1999 SL
Default P0304 has me confused?

First a little background: I bought the car in March this year. It had 4 DTCs EGR and mis-firing #4 cylinder codes. I tried to clean the Egr but ended up buying a new one. I put on new plug wires and new plugs. I carefully cleaned the Ignition module and coil packs used corrosion preventive dressing and all. All codes were gone and all has been well for the past 2 months. I've even used a couple bottles of Chevron Techron fuel cleaner in that time and have logged 7000 miles. The last bottle was about 3 tanks ago. The car has been getting 40-42 mpg highway. All was fine until today!!

I started the car and immediately noticed unusual vibs coming from the engine. I got out the drive way and drove a little bit and turned around and parked it. P0304 is the only code present which is "mis-firing of #4 cylinder" I took the ignition coil packs apart from the ign. module again and cleaned it again. I have lightly cleaned the throttle body(sprayed a 1/8 of a can while it was running). I switched the coil packs to see if the location of the mis-fire would change, nada! I check for spark and it has spark. Anyone have any ideas?

Thanks in advance
1999 Saturn SL SOHC, 5 speed, 272,500 miles....
3500srw is offline   Reply With Quote Sponsored Links


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
Trying to Diagnose a P0304 Problem saturn rings S-Series Tech 61 12-12-2009 07:02 AM
codes po171,p0304,p0446 what could it all mean chevotass Ion Tech 5 03-28-2009 11:28 PM
Trouble Code P0304 & P0420 thaiwebb S-Series Tech 0 07-07-2008 10:11 AM
P0304, P0341, P0410 codes all at once nitsua y zarc S-Series Tech 2 03-17-2008 07:23 PM
P0304 Code (out of ideas) mike_245 S-Series Tech 13 03-13-2008 03:28 AM

All times are GMT -4. The time now is 07:13 AM.

Advanced Forum Search | Advanced Photo Search

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc. The Saturn Enthusiasts Site.