2001 Ram 5.2 Engine Stumbling / Bad Miss
New Member
Joined: Nov 2011
Posts: 1
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Stumbling...
I am having a major problem with my 2001 Ram with a 5.2. I have seen this issue in a few posts but I have not seen a fix for it yet. Heres what the symptoms are
The engine will start up fine and idle fine. After about five minutes of idleing the engne will start to stumble and miss. It gets progressivly worse and almost stalls. If I hit the gas it revs right up with out any problems. Then it will go back to stumbling again. When driving, it hapens when the truck goes into overdrive and the RPMs lower down to 1500 RPM. Then the engine will cut out, back fire, spit and sputter. If I floor it it will take right off and go. It only seems to happen at low rpms when driving.
Heres what I have done so far....
Cap,rotor, wires, plugs. I have OHMED out the coil, it was fine, i checked the Pick Up coil or Cam Postion Sensor and it was fine. I checked the fuel pressure at the rail and it was fine, it was about 50 psi, although it did seem to flutter when the engine was stumbling / Missing but it never dropped below 40 psi.
I am stumped. From some of the other posts I have seen I am thinking it maybe the fuel pump. Although it really seems like it is somthing with the Ignition / Spark. The exhuast seems to be flowing fine so I wouldnt think that it is the CAT.
Any Suggestions you have will be greatly appreciated.
The engine will start up fine and idle fine. After about five minutes of idleing the engne will start to stumble and miss. It gets progressivly worse and almost stalls. If I hit the gas it revs right up with out any problems. Then it will go back to stumbling again. When driving, it hapens when the truck goes into overdrive and the RPMs lower down to 1500 RPM. Then the engine will cut out, back fire, spit and sputter. If I floor it it will take right off and go. It only seems to happen at low rpms when driving.
Heres what I have done so far....
Cap,rotor, wires, plugs. I have OHMED out the coil, it was fine, i checked the Pick Up coil or Cam Postion Sensor and it was fine. I checked the fuel pressure at the rail and it was fine, it was about 50 psi, although it did seem to flutter when the engine was stumbling / Missing but it never dropped below 40 psi.
I am stumped. From some of the other posts I have seen I am thinking it maybe the fuel pump. Although it really seems like it is somthing with the Ignition / Spark. The exhuast seems to be flowing fine so I wouldnt think that it is the CAT.
Any Suggestions you have will be greatly appreciated.
Veteran
Joined: Mar 2010
Posts: 430
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From: Mississippi
What if he unplugged the front 02 sensor and drove it? Would / should it just run in open loop and drive good enough to verify that it is the 02 sensor that is at fault? Do not know if that would work or not, but sort of does sound like a bad 02.
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From: Clayton MI
Grand Champion
Joined: Apr 2010
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From: Meeker, CO
I don't know who came up with it originally, but I'd recommend it and I'm no redneck. I married one once, but, ya know, a leggy blonde fashion model is a leggy blonde fashion model even if she does have a soft spot for cousins once she gets a little too much Strawberry Hill into her.
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Joined: Jul 2013
Posts: 19
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From: Barbados
Glad to see you fixed the 2001 dodge ram . I also have a 2001 5.2L and the last part that I replaced is the harmonic balancer, because I learned that a bad one can cause misfire and damage the transmission over time. If the rubber is cracked like mine was I would replace rather than wait for it to fall apart when driving. Frank
