Rough Running 2005 Rumble Bee
#2386653
10/13/17 01:26 AM
10/13/17 01:26 AM
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Joined: Jan 2003
Posts: 9,407 Brantford Ontario
69_SIX_PACK
OP
master
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OP
master
Joined: Jan 2003
Posts: 9,407
Brantford Ontario
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I was hoping to get some help before I start replacing parts.
2005 Rumble Bee 4x4 5.7L Hemi. 90,000 miles.
The truck runs extremely well, but the odd time, like every 10 days or so it goes into a rough idle, RPM varies, engine light starts flashing. The next day it will run mint again.
I changed the plugs (the old ones looked great), air filter, the Temp Sensor in the air box, cleaned out the throttle body inside and out. I did this about 10 days ago so I figured whatever it was went away.
Today it acted up today and I checked the codes: P0300 - Multiple Cylinder Misfire P0172 - Fuel System Rich P0132 - O2 Sensor High
I was doing some reading on line and some guys have been having issues with broken valve springs with these symptoms, but I don't think the truck would run perfect most of the time?
Today was also a damp day, truck was started up fine, ran well. After a short drive and a restart that is when it started acting up.
Obviously I was thinking of replacing the O2 sensor but would a bad O2 sensor cause a misfire?
Thanks!
Dave
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Re: Rough Running 2005 Rumble Bee
[Re: 69_SIX_PACK]
#2386670
10/13/17 02:54 AM
10/13/17 02:54 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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The early 5.7s also had valve seat problems. Not common but they occurred enough for me to hear about it. A loose valve seat could dislodge, reseat, etc until it falls completely out. My 2007 Ram had an MDS lifter fail at 59,000 miles. It would hang partially open, causing a misfire in that hole and contaminating the mixture in other cylinders as the piston rose to TDC (When the valves should have been closed) The 2003 and up trucks had MDS, right? Mine was intermittent and then went full AFU. THey had to pull the head to get to the lifters. They also pulled the rod and piston to hone and install new rings on that piston. Lets hope that yours is something simple. Bad o2 sensor could cause problems. Good luck.
Last edited by Frankenduster; 10/13/17 02:55 AM.
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Re: Rough Running 2005 Rumble Bee
[Re: 69_SIX_PACK]
#2386748
10/13/17 11:20 AM
10/13/17 11:20 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Today it acted up today and I checked the codes: P0300 - Multiple Cylinder Misfire P0172 - Fuel System Rich P0132 - O2 Sensor High
Thinking the rich code is were I would start, the other two are probably symptoms of being too rich. I'd probably start by putting a gauge on the fuel rail and checking for a leaky injector.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Rough Running 2005 Rumble Bee
[Re: 69_SIX_PACK]
#2386767
10/13/17 11:41 AM
10/13/17 11:41 AM
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Joined: Jun 2003
Posts: 21,456 It's a dry heat
gtx6970
Too Many Posts
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Too Many Posts
Joined: Jun 2003
Posts: 21,456
It's a dry heat
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I was hoping to get some help before I start replacing parts.
2005 Rumble Bee 4x4 5.7L Hemi. 90,000 miles.
The truck runs extremely well, but the odd time, like every 10 days or so it goes into a rough idle, RPM varies, engine light starts flashing. The next day it will run mint again.
I changed the plugs (the old ones looked great), air filter, the Temp Sensor in the air box, cleaned out the throttle body inside and out. I did this about 10 days ago so I figured whatever it was went away.
Today it acted up today and I checked the codes: P0300 - Multiple Cylinder Misfire P0172 - Fuel System Rich P0132 - O2 Sensor High
I was doing some reading on line and some guys have been having issues with broken valve springs with these symptoms, but I don't think the truck would run perfect most of the time?
Today was also a damp day, truck was started up fine, ran well. After a short drive and a restart that is when it started acting up.
Obviously I was thinking of replacing the O2 sensor but would a bad O2 sensor cause a misfire?
Thanks!
Dave If it drives the system full lean, Yes, Its basically starving the engine. A few years back I had a 5.7 Hemi Charger with your exact symptoms. Only faults in it was a misfire code. After lots of trial and error , cking for fuel pressure drops, possible plug wire shorting , Even ckd compression and it was fine. Same deal, it ran fine sometimes,,sometimes not. I finally decided to pull the valve covers off for a look see. Found a broken valve spring right bank . Fixed it and never heard from the cars owner again
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Re: Rough Running 2005 Rumble Bee
[Re: gtx6970]
#2386844
10/13/17 01:28 PM
10/13/17 01:28 PM
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Joined: Jan 2004
Posts: 4,576 Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,576
Motor City
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Try re-torquing your intake bolts. I have to re-tighten mine. Sometimes will act up until it warms up them it goes away. Once I re-tighten them all has been good since.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Rough Running 2005 Rumble Bee
[Re: 69_SIX_PACK]
#2386845
10/13/17 01:33 PM
10/13/17 01:33 PM
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Joined: Jun 2006
Posts: 5,164 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,164
CT
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My buddy had a weak valve spring, started off intermittent, we were chasing electrical stuff. After a few weeks it became constant. Really weird. Compression test showed one cylinder down, we changed both springs on that cylinder and it was all set. This was on an 04.
We knew valve springs were a potential issue, but made the assumption it was electrical since it was intermittent. Run a compression test before you start throwing parts at it.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Rough Running 2005 Rumble Bee
[Re: Supercuda]
#2387088
10/13/17 10:05 PM
10/13/17 10:05 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Today it acted up today and I checked the codes: P0300 - Multiple Cylinder Misfire P0172 - Fuel System Rich P0132 - O2 Sensor High
Thinking the rich code is were I would start, the other two are probably symptoms of being too rich. I'd probably start by putting a gauge on the fuel rail and checking for a leaky injector. I agree with this but it would be good to know the count on the codes to know which set first. If an injector sticks open and causes any cylinders to run rich it can set that Fuel System Rich code first. And then when a cylinder missfires of course it will set the missfire code since to rich can cause the missfire. And the 02 high is from running rich as high reading is also rich and low reading (volts) is lean. Also if the fuel pump pressure ran to high from a bad fuel pressure regulator. But your setup should be a returnless system so the fuel pressure regulator is right on the fuel pump in the tank. But I agree it sounds like it goes rich at times and then missfires. Ron
Last edited by 383man; 10/13/17 10:07 PM.
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Re: Rough Running 2005 Rumble Bee
[Re: Supercuda]
#2387394
10/14/17 04:32 PM
10/14/17 04:32 PM
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Joined: Jan 2008
Posts: 2,363 Cotati, CA
Dave Hall
top fuel
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top fuel
Joined: Jan 2008
Posts: 2,363
Cotati, CA
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Good call! Tech buddy just said injectors or crap fuel. I don't think the order matters. Do what supercuda said check for leaky injectors. Makes sense.
Last edited by Dave Hall; 10/14/17 04:34 PM.
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Re: Rough Running 2005 Rumble Bee
[Re: Dave Hall]
#2387727
10/15/17 01:38 PM
10/15/17 01:38 PM
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Joined: Feb 2003
Posts: 16,156 Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,156
Mesa, Arizona
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How about a dirty injector or injectors. Try some injector cleaner.
“So if it’s on the internet it must be true”
Abe Lincoln
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