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04 RAM 1500 Hemi rough idle??? #1668021 09/06/14 11:04 AM 09/06/14 11:04 AM
Joined: Dec 2008 Posts: 380 S.W.Conn. 1968beepbeep OP enthusiast
1968beepbeep OP enthusiast Joined: Dec 2008 Posts: 380 S.W.Conn.	My 04 ram has a really rough idle and its making me crazy. Bought it new and its been a good truck till now. It does have 160k on it but well maintained. I put new plugs, new wires, new coil packs and a new map sensor, and one new injector. Codes are -cylinder misfire #4 ??? Please help, any idea's???

Re: 04 RAM 1500 Hemi rough idle??? [Re: 1968beepbeep] #1668022 09/06/14 11:19 AM 09/06/14 11:19 AM
Joined: Jan 2003 Posts: 8,163 Plymouth, MI Blusmbl master
Blusmbl master Joined: Jan 2003 Posts: 8,163 Plymouth, MI	I'd check compression on #4. I've heard the hemis occasionally break valvesprings on higher milage engines. '18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118

Re: 04 RAM 1500 Hemi rough idle??? [Re: Blusmbl] #1668023 09/06/14 12:39 PM 09/06/14 12:39 PM
Joined: Dec 2009 Posts: 20,631 in a cattle trailer down by th... G Guitar Jones Paddle faster! I hear banjo music!
Guitar Jones Paddle faster! I hear banjo music! G Joined: Dec 2009 Posts: 20,631 in a cattle trailer down by th...	Yep, probably a broken valve spring, at least that's an easy hole to get to. "Follow me the wise man said, but he walked behind" '92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.

Re: 04 RAM 1500 Hemi rough idle??? [Re: 1968beepbeep] #1668024 09/06/14 03:07 PM 09/06/14 03:07 PM
Joined: Jun 2011 Posts: 129 London Ontario Canada Eh D Dono member
Dono member D Joined: Jun 2011 Posts: 129 London Ontario Canada Eh	Been down this road before. It really is an easy fix. You need to pull and clean the injectors. There is iron filings from the fuel pump stuck to the magnets in the injector leaning the fuel flow out. Pull them out one at a time and shoot them with high pressure air. Grease the O ring and slip it back in. These iron filings are super fine. The fuel filter is in the tank before the pump. As the pump wears the iron will end up in the injectors and the fuel pressure and flow will not break the magnetic bond. Cheers Don.

Re: 04 RAM 1500 Hemi rough idle??? [Re: 1968beepbeep] #1668025 09/23/14 10:40 PM 09/23/14 10:40 PM
Joined: Dec 2008 Posts: 380 S.W.Conn. 1968beepbeep OP enthusiast
1968beepbeep OP enthusiast Joined: Dec 2008 Posts: 380 S.W.Conn.	Thanks guy's, did a compression test, 105 on #4 cylinder intake valve spring was weak, replaced both intake and exhaust valves, compression after was 180. Truck runs great! Thanks!

Re: 04 RAM 1500 Hemi rough idle??? [Re: 1968beepbeep] #1668026 09/24/14 01:02 AM 09/24/14 01:02 AM
Joined: Jan 2003 Posts: 8,163 Plymouth, MI Blusmbl master
Blusmbl master Joined: Jan 2003 Posts: 8,163 Plymouth, MI	Cool, glad it's fixed. I have an 05 with 109k, I'm waiting for mine to act up too. '18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118

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