2004 Chevy Malibu Classic 2.2 P0300 random/multiple misfire code - Chevy Malibu Forum: Chevrolet Malibu Forums
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 01-29-2014, 03:41 PM Thread Starter
CMF Rookie Member
Join Date: Jan 2014
Posts: 1
2004 Chevy Malibu Classic 2.2 P0300 random/multiple misfire code

I am not the most mechanically inclined person so i am hoping someone can help me here. I have a 2004 chevy malibu classic, 2.2 L ecotec. It was running fine and i parked outside of Walmart to do some shopping. it was very cold that night, but there was no issues up til this point. I went to start it after it sat for 2-3 hours and it would turn over on first crank. on second crank it turned over and was idling very rough. let it warm up and idle was still very hard. limped it home and waited til morning turned it on and still rough idle. took it in to autozone and it was running a P0300 code and a knock sensor code. I bought new knock sensor, 4 plugs, new wires and replaced it all. Plugs were gaped much to far, almost double the guy told me, and the were pretty burnt up. I replaced knock sensor and 4 plugs and wires. Car still idling very rough at this point. the knock sensor code cleared but still running a p0300. replaced the coil pack and still running the p0300. rough idle, no acceleration, shifting at very high RPMS, and down shifts to 3rd and gets to 3-3.5K rpms up hills, the engine takes forever to heat up, and the oil temp gauge will drop if idling at light with the heat on, drinking gas at an unbelievable amount for the car. there is a very strong fuel smell in the exhaust. where do i go from here? Ignition module? that is my next step i think, because its getting fuel fine, and i took the plugs back out and seem to have even amounts of wear on them. any input would be greatly appreciate. Thank you!
jakelynch54 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 01-30-2014, 03:53 AM
DrivenDaily's Avatar
Join Date: Dec 2009
Location: Indiana
Posts: 12,159
Re: 2004 Chevy Malibu Classic 2.2 P0300 random/multiple misfire code

Check your fuel pressure regulator.

I had an '87 Ford Ranger and the FPR went bad. I went from 23 to 10 MPG with black smoke. Replaced the FPR and it solved it.

Not saying that's what yours is, but check it to be sure.

'11 LTZ, born Aug 2010, Fairfax, KS

V6/A6, Red Jewel Tintcoat / Cocoa-Cashmere, Sunroof
Mods: WeatherTech mats, CHMSL Pulser

How-to: LEDs in mirrors :: How-to: 1-Wipe Wash
How-to: Remote express windows up/down

Traded: '09 2LT Black Granite Metallic V6 / A6 at 20,058 miles
Lost: '11 LTZ RJT V6 / A6 in flood at 44K miles
Muffler mod on '09
DrivenDaily is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy Malibu Forum: Chevrolet Malibu Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
2004 Chevy Malibu Classic - Update Radio? mbratch Modifications (Generations 5 & 6) 12 09-04-2013 04:27 AM
P0300/Random Misfire Code isaacf32 Problems/Service Issues/Troubleshooting (Generations 5 & 6) 9 07-14-2013 03:01 PM
P0455 Code 2004 Classic (4 cyl) ClassiX2 Problems/Service Issues/Troubleshooting (Generations 5 & 6) 4 04-13-2012 03:51 PM
2006 Malibu P0300 random misfire bezanson Problems/Service Issues/Troubleshooting (Generations 5 & 6) 5 10-28-2011 09:59 PM
2004 chevy malibu classic vats passlock marknut Do It Yourself Maintenance (Generation 7) 2 06-03-2009 07:00 AM

Posting Rules  
You may post new threads
You may 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

For the best viewing experience please update your browser to Google Chrome