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I have a 2004 Hemi with an idle problem. The truck has 69,000 miles on it. When I come to a stop the idle will drop to 400 RPM then back to 600 RPM. It doesn't do it all the time but often enough to where I think it might stall. Any ideas what might be causing this? The only work I've had done recently is the transmission fluid and filters changed.
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Try cleaning the throttle body.
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mine will drop rpms that far or lower sometimes when i let off the gas not all the time just sometimes and and once in a blue moon it will shut off. also when crusing like a around town at about 2000rpm it will like surge rpms start going up and down but if i let off or give it more gas it stops but if not it gets worse and worse.
04 QC 2x4 exterior-blacked out, stock 20's painted black, halo projector headlights, street scene front bumper, limo tint all the way around, DJM 2/4 drop interior- custom painted red interior, pioneer flip up dvd player, 1200 watt kenwood amp, 2 12" rockford fosgate P2's under back seat, mods- K&N intake, throttle body spacer, black magic e-fan, custom exhaust system with flowmaster super-44 with custom made dual 3" black exhaust tips, nirtous system 125 shot, diablo programmer |
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"Dave" HTC.com Man of the Year - 2008 VP Kentucky Chapter Truck of the Month April 2006  |
Are there any trouble codes? Here's a TSB that addresses idling problems.
http://dodgeram.info/tsb/2005/18-013-05.htm Oh, and  '05 RCSB 1500 SLT 5.7 Hemi Ram - 4" ram air from fog light hole - Amsoil drop-in filter - AirAid MIT - Taylor shorty wires - FM 50HD SI/SO 3" Magnaflow y-pipe - General Grabber UHP 295/50 20 tires - Superchips Flashpaq 3815 - Motive 4.56 gears - Detroit Truetrac differential Lakewood traction bars - PML differential cover - Best reaction time .011 @ Bowling Green Best 1/8 mile 9.28 @ Bowling Green - Best 1/4 mile 14.51 @ Bowling Green - ETs before gears, DTT, traction bars, improved ram air, and y-pipe                |
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"Zachary" VP OK Chapter  |
Mine does the same thing only it goes from 600-800 or so. usually after start up. also when i coast in neutral it sometimes jumps up to 1900-2000 and stays there til I stop.
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"Jordan" |
My '04 idled poorly, sputtered during acceleration, and wanted to stall often several months ago, checked my O2 sensors and found one defective. Replaced it and running 100%. Mine has 71K miles.
_____________ 2004 QC 2WD Comp 268 cam, 6.1L valvesprings/pushrods, Pacesetter Jet-Hot coated LT's/ORY, K&N intake, Taylor shorties, Borla XR1 dumped, 3.92/posi rear, SCT tune by Hemifever, short belt for the track, 15% tint, 2" drop shackles, debadged except fenders |
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"Ken" Secretary California Chapter |
jordan-how did you come to the conclusion that your O2 sensor was bad? Was it a certain reading via a scanner or tuner(Superchips/Diablo)? Or,just testing the lines?
04 Atlantic Blue RC/SB-1500/2wd -4.10's/lsd/17's,Superchips,PSC-001,Ramhammer,Airram scoop,JBA headers,custom y-pipe, Magnaflow muffler(SI/DO)dumped, Comp 260 cam,6.1 springs,6.1 pushrods,180 t-stat,NGK 4306's,Taylor shorty's,Western Chassis 2/4 drop,and a few things not yet installed...... |
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"Ken" Secretary California Chapter |
...back to the thread topic-I agree with trying to clean the throttle body and replacing your pcv valve as helpful items.
04 Atlantic Blue RC/SB-1500/2wd -4.10's/lsd/17's,Superchips,PSC-001,Ramhammer,Airram scoop,JBA headers,custom y-pipe, Magnaflow muffler(SI/DO)dumped, Comp 260 cam,6.1 springs,6.1 pushrods,180 t-stat,NGK 4306's,Taylor shorty's,Western Chassis 2/4 drop,and a few things not yet installed...... |
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Does it do that on just after a cold startup? My 04 would start fine and stall when I got to the first traffic signal. It would re-fire and run fine after that. Coincidentally it was after I had the dealer change the trans fluid. I checked it and it wasn't registering on the dipstick after a 15 mile drive while idling in neutral like the dipstick said. I took it back in and they claimed it was a pint low (yeah, one pint...right). Check your trans fluid level.
2009 Dodge Ram 1500 QC sunburst Orange 2005 Ford Mustang convertible red w/black top (wife's ride) 1998 Chevy Cavallier Black fading into primer (the winter ride) 3 Siberian Huskies 1.5 - 3.5 years old and a good ole dogsled. Much more fun than any vehicle!  |
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All good advice. I'm going to start with the throttle body clean, PCV valve and check tranny fluid. Thanks!
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"Jordan" |
I've dealt with faulty sensors in the past and just had a hunch that that's what it might be. I also had a pretty bad exhaust leak near one of the sensors so it was easy to narrow it down. It ran exactly like an old Chevy small block with a vacuum leak, is the best way to describe it. If I remember, those tuners allow you to check O2 sensor voltage and I'm sure that would help you pinpoint the problem, but I'm using SCT now so can't help there.  _____________ 2004 QC 2WD Comp 268 cam, 6.1L valvesprings/pushrods, Pacesetter Jet-Hot coated LT's/ORY, K&N intake, Taylor shorties, Borla XR1 dumped, 3.92/posi rear, SCT tune by Hemifever, short belt for the track, 15% tint, 2" drop shackles, debadged except fenders |
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i know the throttle body is clean cause i cleaned it not to long ago but maybe it is the o2 sensor it does have 82,000 on it. i guess i will use the predator and check the o2 like you said to do
04 QC 2x4 exterior-blacked out, stock 20's painted black, halo projector headlights, street scene front bumper, limo tint all the way around, DJM 2/4 drop interior- custom painted red interior, pioneer flip up dvd player, 1200 watt kenwood amp, 2 12" rockford fosgate P2's under back seat, mods- K&N intake, throttle body spacer, black magic e-fan, custom exhaust system with flowmaster super-44 with custom made dual 3" black exhaust tips, nirtous system 125 shot, diablo programmer |
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..tranny pcm has more influence on the pcm then we give it credit for. double check fluid level (while warmed up and in neutral)
...FREDDIE... Stu's Spartan cam-Stu's Big valve heads-4.10 gears-efan-pacesetter LT's-shift kit- RamHammer CAI-true dual exhaust-Magnaflow dumped-dual DMH e-cutouts- DS Predator with custom tune-180 t-stat-Caltracs best 60ft - 1.797, 1/8th -8.26@79.65, 1/4 - 13.08@102.17        |
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ok i will check the tranny fluid first then go from there
04 QC 2x4 exterior-blacked out, stock 20's painted black, halo projector headlights, street scene front bumper, limo tint all the way around, DJM 2/4 drop interior- custom painted red interior, pioneer flip up dvd player, 1200 watt kenwood amp, 2 12" rockford fosgate P2's under back seat, mods- K&N intake, throttle body spacer, black magic e-fan, custom exhaust system with flowmaster super-44 with custom made dual 3" black exhaust tips, nirtous system 125 shot, diablo programmer |
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 HTC.com Audio Consultant  |
mine used to do that and stall to but after Superchips lowered the part throttle 1-2 shifting the idle went to 680RPM and now it idles very smooth and steady, i don't know what else they did but it fixed it
 Black 2004 Qc 4X4, Superchips,comp 260 cam,home ported & milled heads,6.1 spring and pushrods, PSC1, Taylor Thundevolt 50, Edelbrock TES headers, true duals with Magnaflow, K&N C.A.I., Innovate LC1, MarkVIII E Fan, 180* t stat,Hellwig RSB, 6 X HID,sport running boards and bed accents,lund rool pan, Kenwood KNX7100 nav., R camera, 80G hard drive, 9" flip down monitor, Phoenix gold Tantrum 600.4 for Diamond Audio 4.5" dash and R.F. 5" R doors, Orion Extreme 500.4 for HCCA 6S comps front door, Precision Power DCX 1500.1 for 2 X 10" RE Audio SE, Oxygen Audio 20 Farad cap, Rammat sound deadner, tons of wires |
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