SaturnFans.com
saturnfans.com - classifieds - forums - webmail


Go Back   SaturnFans.com Forums > Models > Saturn S-Series > S-Series Tech

Reply
 
Thread Tools Display Modes
Old 09-06-2016, 01:30 PM   #1
Chris Bedard
New Member
Chris Bedard is on a distinguished road
 
Join Date: May 2011
Location: Lunenburg, MA
Posts: 2

2002 SC2
Default Low Compression #4, P0304 Code

Yet another low compression thread, sorry.
Car is a 2002 SC2 DOHC 1.9, manual trans, has just under 200K miles.
I came at this problem kinda backwards. It was throwing the P0304 code and my inspection sticker was coming up so I needed to get it fixed to pass inspection.
Replaced plugs and wires, IAC valve, EGR. Code persists. Replaced coil, no change. Replaced ICM, no change. Swapped fuel injectors for #4 and cylinder next to it, #3? No change. No oil in spark plug tubes. OK, tiny amount.
Finnally checked compression, engine cold. All cylinders peaked in pressure after about 5 seconds or less of cranking.
#1, 160psi
#2, 150psi
#3, 150psi
#4, 60psi.

OK, clearly that's my P0304 problem. I have not done a leak down test to determine if it's valves or rings. I suspect valve.(s) It does use oil but I don't think I'm burning it. I think it's leaking. There is no noticeable blue smoke.
So... at 200K miles I am REALLY not interested in putting in an engine, or replacing a head. But if I have to have a valve job done then I will.
Is there a quick and dirty way to make the P0304 code go away long enough to get the inspection sticker? If I unplug the #4 fuel injector will it stop throwing that code?
Thanks for any info!

Chris
Chris Bedard is offline   Reply With Quote
SaturnFans.com Sponsored Links
Old 09-06-2016, 01:49 PM   #2
fetchitfido
Super Member
fetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant futurefetchitfido has a brilliant future
 
fetchitfido's Avatar
 
Join Date: May 2006
Posts: 14,599
 

2001 SC2
Default Re: Low Compression #4, P0304 Code

With numbers that low that engine is just simply done.

I doubt it'll fix the misfire code but unless the injector plug argues more than normal it takes 10 seconds to pop it off, then 35 to remove the negative battery cable to clear the code. Then drive it around for a while, see if the CEL comes back on.
...
The proper way to fix a S-Series automatic is to replace it with a 5spd O:)
fetchitfido is offline   Reply With Quote
Old 09-07-2016, 12:15 PM   #3
Chris Bedard
New Member
Chris Bedard is on a distinguished road
 
Join Date: May 2011
Location: Lunenburg, MA
Posts: 2

2002 SC2
Default Re: Low Compression #4, P0304 Code

I pulled the FI plug and while it did not immediately throw a code, it did run much worse. lol So I guess cylinder #4 is still firing to some extent. It runs bad enough that I'd rather not have to drive it around like that for 150 miles before I can go in to get the inspection sticker.
It does only throw the P0304 code intermittently so I"m going to try to gamble on getting to 150 miles without getting a code and then run in to get the sticker.
Hopefully that will happen. About 40 miles so far.
Chris Bedard is offline   Reply With Quote
Reply

Bookmarks

Tags
low compression, p0304


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
can't shake the P0304 code kalle28 S-Series General 1 04-18-2012 12:46 PM
99 SL2 P0304 code......please help buniquesl2 S-Series Tech 5 08-12-2011 08:49 PM
Need some help with ICM, code P0304 rfortier1796 L-Series Tech 3 08-23-2010 02:34 PM
P0304 Trouble code kj0426 Ion Tech 14 05-17-2010 03:24 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 05:03 PM.

Advanced Forum Search | Advanced Photo Search


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
SaturnFans.com. The Saturn Enthusiasts Site.