Go Back   DODGE RAM FORUM - Dodge Truck Forums > Dodge Ram Generations Forum > 3rd Gen : 2002 - 2008 > Engine & Performance


Engine & Performance

Runs like crap again P0300 code-hemi 5.7


This is a discussion on Runs like crap again P0300 code-hemi 5.7 within the Engine & Performance forums, part of the 3rd Gen : 2002 - 2008 category!
I just got this P0300 code 2 days ago(the first time was 3 months ago and they said I needed ...


Like Tree1Likes

Sponsored By: Moe's Performance
Reply
 
LinkBack Thread Tools Display Modes
Old 01-10-2012, 08:46 PM   #1 (permalink)
Junior Member
 
Join Date: Jan 2012
Location: Vancouver BC Canada
Age: 54
Posts: 3

Ram Year: 2004
Engine: Hemi 5.7
Unhappy Runs like crap again P0300 code-hemi 5.7
I just got this P0300 code 2 days ago(the first time was 3 months ago and they said I needed new plugs so I got it done and CEL disapeared until 3 days ago). Today on a cold start she runs OK for 2-3 minutes and then wham! it runs like crap. 3 days ago it started running very bad while I was 50 miles from home. 3 months ago it started being a little hesitant of the line on a gentle accelerate and when it got over 1000rpm would kick in better. I had plugs and EGR changed recently. The only time it does run proper(tried it today) is when I hammer it to the floor and it runs like it always did-fast and hard! otherwise its barely alive and dies once in a while. Is it possible I have valve spring issue? It's got 168,000km(105K miles) on 5.7L Hemi.
ANY IDEAS GUYS? feel free to ask any questions
thanks!


Sponsored Ad
Register to remove this ad.
silversides04 is offline   Reply With Quote
Old 01-10-2012, 08:54 PM   #2 (permalink)
 
ramhunter9's Avatar
Supporting Member
 
Join Date: Jun 2010
Name: Dave
Posts: 24,508

Ram Year: 2012
Engine: P-Star Jeep Wrangler
Default
http://www.ramforum.com/f54/trouble-code-list-151/

P0300 Multiple Cylinder Misfire

How old are your plugs .. you know they need changed every 30k
ramhunter9 is offline   Reply With Quote
Old 01-10-2012, 09:08 PM   #3 (permalink)
 
BlackedOutHemi's Avatar
Senior Member
 
Join Date: Feb 2011
Location: DFW, Texas
Name: Eddie
Age: 23
Posts: 5,462

Ram Year: 2012 & 2012
Engine: 5.7L HEMI & 6.7L Cummins
Default
He said at the top he just changed them 3 months ago when he had the first problem, so has to be something else.


Sent from my iPhone using Tapatalk


__________________
BlackedOutHemi is offline   Reply With Quote
Old 01-10-2012, 09:10 PM   #4 (permalink)
Senior Member
 
Join Date: Jul 2010
Location: Southern Alberta
Name: Danny
Age: 55
Posts: 3,578

Ram Year: 2003 Forgottens
Engine: Hemi 5.7 (1 of 2)
Default
I have had this issue on and off for 2 years and finally figured out the Problem.

Dirty Fuel Injectors for Sure.

I have remidied my situation for now using STP Fuel Injector cleaner Bottles run through 4 consecutive tanks in a row while doing 1200 mile Trip. I have not had the P300 in about a month or so. Prior to this I suspected the injectors and would do an STP cycle and about 1000 miles later the light/code would come back.

The light/code will go away on its own to tell you they are working clean again.

I plan on paying the approx $169 for a profesional treatment next time which will yield some long time results but I am pretty sure that is what your problem is and like Dave said check your plugs and maybe replace them anyway.

Another sign of this is white residue on some/not all of your plugs before the 30 K interval.
Seeing the age of your Truck I would recommend changing the PCV Valve and the Map sensor ($50 bucks for both) Also if your wires are stamped 2004 along the leads they are probably weak as well.

Just my 2 cents, Bud. And Welcome to the Forum.
Hootbro likes this.


__________________
2014 Ram Sport Crew 4x4 Black w/8 Speed and 3.92./2016 Jeep Cherokee TrailHawk-Mango Tango/2005 Magnum RT-Inertia Built w/3K Stall/3.06-3.91 LSD Getrag(s)/Full Brembos/Lowered/More! 2005 Magnum RT AWD, Mopar Street Cam, Shorty Headers, 6.1 Intake, Intune, SRT Damper-oil pump-valve springs-Mopar drop-in filter, Dynomax LX specific Mufflers-shorty plug wires-platinum plugs gapped .040 Winter Beater!

Last edited by 03MopaRamman; 01-10-2012 at 09:14 PM.
03MopaRamman is offline   Reply With Quote
Old 01-10-2012, 09:18 PM   #5 (permalink)
 
ramhunter9's Avatar
Supporting Member
 
Join Date: Jun 2010
Name: Dave
Posts: 24,508

Ram Year: 2012
Engine: P-Star Jeep Wrangler
Default
Originally Posted by BlackedOutHemi View Post
He said at the top he just changed them 3 months ago when he had the first problem, so has to be something else.


Sent from my iPhone using Tapatalk
What I was trying to get at is .. what plugs ? Did you use the champion copper plugs or some platinum plugs ? Platinum = no good
ramhunter9 is offline   Reply With Quote
Old 01-10-2012, 09:23 PM   #6 (permalink)
 
BlackedOutHemi's Avatar
Senior Member
 
Join Date: Feb 2011
Location: DFW, Texas
Name: Eddie
Age: 23
Posts: 5,462

Ram Year: 2012 & 2012
Engine: 5.7L HEMI & 6.7L Cummins
Default
I see. And completely agree. Goodluck man! Hope you get it fixed.


Sent from my iPhone using Tapatalk


__________________
BlackedOutHemi is offline   Reply With Quote
Old 01-10-2012, 09:48 PM   #7 (permalink)
Junior Member
 
Join Date: Jan 2012
Location: Vancouver BC Canada
Age: 54
Posts: 3

Ram Year: 2004
Engine: Hemi 5.7
Default
I used the regular plugs not platinum, the stealership put them in less than 5K ago.
silversides04 is offline   Reply With Quote
Old 01-10-2012, 09:51 PM   #8 (permalink)
Junior Member
 
Join Date: Jan 2012
Location: Vancouver BC Canada
Age: 54
Posts: 3

Ram Year: 2004
Engine: Hemi 5.7
Default
I have read so many different remedies for this issue on many forums and posts, but I will put injector cleaner in. BTW I have been running Chevron 91 for a yr now.
Thanks for advice and the welcome note!
silversides04 is offline   Reply With Quote
Old 01-10-2012, 10:49 PM   #9 (permalink)
Senior Member
 
Join Date: Jul 2010
Location: Southern Alberta
Name: Danny
Age: 55
Posts: 3,578

Ram Year: 2003 Forgottens
Engine: Hemi 5.7 (1 of 2)
Default
You will need to do a Highway Trip and after 200KM you should start to feel improvement and by the end of the first tank your light should go away on its own during a self check. But it takes a couple of Tanks to totally disappear. Don't let it sit in the tank for too long though. And if you fill up before its empty just add more. A 350 Ml Bottle treats up to 80 L so guage for the extra 20L on the first go so like more than one bottle to start. Once your problem is fixed treat it every oil change and if it persists further/comes back after 2000 KM then they require treatment again or have them cleaned Proffessionaly at say Fountaine Tire.

I also fryed a $200 set of NGK Iridiums in the last year and learned my lesson about putting in other than Copper plugs. All along I thought it was related to my Crazy Spartan Cam and Tuning Issues but now realize it was my injectors all along and i too was running 91 Octane Fuel.

BTW my problems started at around 235 K Km (Metric Talkin Eh!).

And please report back your findings on here as I am Pretty Sure it will Help with your Problem.


__________________
2014 Ram Sport Crew 4x4 Black w/8 Speed and 3.92./2016 Jeep Cherokee TrailHawk-Mango Tango/2005 Magnum RT-Inertia Built w/3K Stall/3.06-3.91 LSD Getrag(s)/Full Brembos/Lowered/More! 2005 Magnum RT AWD, Mopar Street Cam, Shorty Headers, 6.1 Intake, Intune, SRT Damper-oil pump-valve springs-Mopar drop-in filter, Dynomax LX specific Mufflers-shorty plug wires-platinum plugs gapped .040 Winter Beater!
03MopaRamman is offline   Reply With Quote
Old 01-10-2012, 11:10 PM   #10 (permalink)
 
bigbadram1500's Avatar
Administrator

 
Join Date: Jul 2010
Location: Springfield, IL
Name: Wendy
Age: 38
Posts: 15,232

Ram Year: 2008
Engine: Hemi 5.7
Send a message via Yahoo to bigbadram1500
Default
Welcome to the forum. Hope you get it fixed up. Let us know how it goes.


__________________
RamForum.com Administrator
Got a Charger? Check out www.chargerforum.net

bigbadram1500 is offline   Reply With Quote
Reply

Tags
2004 dodge ram, hemi 5.7, p0300

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
P0300 - Random Misfire AF_Hemi Tech Info 15 11-26-2011 05:03 PM
Engine Problem Flashing CEL p0300 code blk05hemi Engine & Performance 12 09-28-2011 08:33 AM
Vids of my runs at Ennis RandTx Photos & Videos 10 11-09-2010 03:59 AM
Why do I feel like my Hemi doesn't run like a Hemi? - revisited jmoore Engine & Performance 7 09-19-2010 06:09 PM

<




GM Truck Forum
Ford Raptor Forum
Chevy Tahoe Forum
Chevy Cobalt Forum
Chevy Camaro Forum
Toyota FJ Cruiser Forum
Ford Truck Forum
88-98 GM Truck Forum
73-87 Gm Truck Forum
Ford Expedition Forum
Chevy Equinox Forum
Chevy Cruze Forum
Jeep Liberty Forum
Jeep Forum
Dodge Ram SRT10 Forum
Chrysler 200 Forum
Scion xD Forum
Scion xB Forum
Dodge Challenger Forum
SRT Forum
Nissan Titan Forum
Buick Enclave Forum
Cadillac Forum
Cadillac XTS Forum