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2 Errors, running rough, no power on 4.7l 2006 Dodge Ram

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Old 08-09-2011, 06:33 PM
JayDee240 JayDee240 is offline
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Default 2 Errors, running rough, no power on 4.7l 2006 Dodge Ram

I just bought this truck. I took a gamble when I bought it. It was sold as-is,runs and drives, no further information. '06 4x4 quad cab long bed for $4800, I took my chances... Anyway, the engine (4.7L V8) sounds smooth, no knocking or tapping, maybe a slight miss, but really it sounds good. I put it in Drive, and can barely move on a flat surface. Speeds top out at about 5mph. The truck has no ***** at all. And I hear a very loud hissing sound when I try to accelerate, but I cannot visually see a vacuum leak anywhere. I get 2 Errors P0068(MAS and TPS sensor) and P0113(Intake Air Temperature Sensor). My scanner won't read the codes, it can't connect for some reason, I read these by the "triple key turn" technique. The truck was sitting for a few months before I bought it. It literally has only been in my driveway for 3 hours so I did not look it over completely yet. I just want to know if these 2 errors would cause the truck to run like this?

Also, In neutral, I can't rev the engine. It bounces between like 1500-2500RPM if I hold the gas all the way down. Is that maybe a safety feature or something? Other than this one, the newest truck I've ever owned was a '97 so I don't know the electronics on these newer ones yet.
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  #2  
Old 08-09-2011, 06:51 PM
Owensue Owensue is offline
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There is a rev limiter for P&N and each gear.

You can removeband try to clean the IAT it should be a bright blue color, be gentle with it and don't use anything too harsh to clean it. I used wd40 on mine, it cleaned up nice.

I would begin by removing the air box and remove and clean the throttle body ( again watch what you use) that will give you better visibility to see where a vacuum leak may be. You can clean the tps with the throttle body out also, you can also just try resetting the tps. Turn key to On( don't start it ) wit for all the dinging to stop press the gas pedal to the floor and then to rest position smoothly. Turn key to off. Try and start it and see if it's any better.
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Old 08-09-2011, 08:49 PM
JayDee240 JayDee240 is offline
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I cleaned the sensors and throttle body with WD40. Everything cleaned up very nice. I put everything back together and reset the TPS. No changes. The truck still idles very rough and will barely move. Still alot of hissing, and I checked everywhere that I could while the truck was running and I can't locate the hissing. I can hear it better from under the truck, I think it's on the backside of the engine, but it's dark now, it will have to wait until tomorrow.

I started it a few times, it seems that it likes to backfire when it first starts up, and it will run for 1-3 seconds after I turn the key off until it stumbles and stutters off. Is that another symptom of the engine codes that I'm getting?
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Old 08-09-2011, 10:39 PM
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Clean the TB and sensors with brake cleaner, not oil. Sounds like it has some tranny issues. The hissing may be coming from the evaporative emissions canister. Kinda sounds like the plug wires are out of place, but I believe there aren't any. Wonder if it's possible for the coil packs to be connected to the wrong cylinders?
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Old 08-10-2011, 01:04 AM
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I had tons of problems in gm a few years back, TPS sensor could be your problem, i hope its easier to replace in this truck than it was in my 1990 grand prix, it was on the back of the block, had to get way up in a tight spot to get it in w/ no view at all. (unless I could have pulled the engine)

Did you replace the throttle position sensor yet?
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Old 08-10-2011, 06:24 AM
JayDee240 JayDee240 is offline
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It's very possible that the coil packs are on the wrong cylinders, but wouldn't that give me a different engine code? I think I should have random misfires if they are messed up.

I checked the ohms on the TPS and they seemed fine but I'll try replacing it anyway since I have an extra one.

Another thought, my scanner can't connect to the PCM, any chance the PCM is bad and it's not reading the sensors at all?
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Old 08-10-2011, 09:26 AM
Owensue Owensue is offline
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Another thought, my scanner can't connect to the PCM, any chance the PCM is bad and it's not reading the sensors at all?

You probably need an adapter cable for your scanner, dodge did not follow the wiring standard.
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Old 08-10-2011, 10:11 AM
SeanW727 SeanW727 is offline
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Coil packs can go on any cylinder. And the wires that connect to them should be labled and positioned to each cylinder. 1357 2468 etc. You would be getting a misfire code if one of these wasnt working properly (most of the time)
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Old 08-10-2011, 05:58 PM
SeanW727 SeanW727 is offline
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Another thing to check.... Did you check to make sure the transmission has fluid in it? I've seen vehicles with next to no transmission fluid that would rev up, and when the torque convertor finally caught, the vehicle would move for a split second at about 5 mph.
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Old 08-10-2011, 06:49 PM
JayDee240 JayDee240 is offline
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Tranny fluid is at the right level, although there is a delay before it goes into gear, maybe the filter needs changed? TPS has weird resistance between the 2 outer pins, one is ground, on a new pin its like 7 ohms, old one is 2 ohms. I drove it in my yard and got a new error of P0123 (Throttle Position Sensor High Voltage). I put a new TPS in and now it no longer idles rough, but still not a drop of power. I have the battery disconnected now, hopefully that will clear my codes and maybe give me a new one to work with.
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Old 08-10-2011, 07:59 PM
JayDee240 JayDee240 is offline
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Update: After resetting the computer, my scanner now works, I'm only getting 1 Error (P0300: Random cylinder misfire), and I still have no power. In fact, my yard is sloped, and I cannot make it to the top of my yard, the truck backfires and sputters then comes to a dead stop. But now at idle I can rev it to 4500rpm before the rev limiter kicks in. Also Idles smooth since replacing the TPS. Maybe warped or cracked heads? Is there any way to test that with my scanner?
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Old 08-10-2011, 11:10 PM
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Check your oil for water contamination or your exhaust for coolant burn.
You can do a compression test on each cylinder and depending on the extent you should see one or more significantly off from the rest.

Pull each plug one by one look for discoloration or other tell tail signs of a problem.

If the truck had been sitting for a while is there any chance the parking brake is seized?
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Old 08-11-2011, 06:06 AM
JayDee240 JayDee240 is offline
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Oil is clean, plugs are clean, compression is good. Parking brake works fine, I can coast down hill freely. I don't want to accept it but it's really starting to sound like the transmission is shot... I thought I would have gotten an error if the transmission was acting up but I suppose that's not always true. I'm going to try removing the catalytic converter tonight, If that doesn't change anything, it's going to the garage for a tranny rebuild.
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Old 08-11-2011, 07:07 AM
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Sounds to me like that '06 never got a lick of maintenance. The 545rfe is a pretty solid tranny, but of course if it was ragged on or still has the original fluid it could be bad.

I'd look more at the solenoids first.

The 4.7 doesn't rebound well from an overheat, so the oil being free of coolant and compression sounds promising...
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Old 08-11-2011, 06:23 PM
JayDee240 JayDee240 is offline
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This is the first time I've ever tried this, but I lifted the rear of the truck up and put it in drive, then gave it some gas. It runs smooth, rear wheel speed responds to RPMs. I put it back on the ground, and it barely moves. When I have it in drive and I'm not moving, when I turn the wheel, the pumps squeaks insanely loud. But once I step the pedal down it stops squeaking. The truck is 700RPM in drive at dead stop. When gas is completely floored, it will reach almost 1500RPM Also, brake fluid is good, brake lines are bled.. however, very weak brakes. I have to floor them, It's like the power booster isn't even working. I found a vaccuum leak back behind the throttle body, I could only reach it from under the truck and I couldn't see it at all. It seems like the brakes and steering squeaking got much worse after I reconnected the 1" hose. Is this related to the no power problem?
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Old 08-11-2011, 07:47 PM
JayDee240 JayDee240 is offline
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I put the plates on the truck and drove it down the road, and it actually got up to speed, It seemed to shift like it should. The only problem that I notice is that it shifts from 1st to 2nd, then back to first again. But I have the pedal to the floor and it shifts to 2nd at about 25MPH or 3000RPMs, so I imagine it's just kicking back down to give me some RPMs. Then it goes to 3rd and 4th no problem (it shakes and rattles like hell), I only took it up to 55MPH on a back road. And my brakes work once I start driving! I still have no idea whats wrong but now I am assuming the tranny is fine. I'm going to get a new Mass Air Flow Sensor tomorrow. My garage told me that is most likely the problem, but they don't do much work on newer cars so it's more like an educated guess.
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Old 08-11-2011, 09:21 PM
Owensue Owensue is offline
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After replacing the TPS did you do the sensor reset as I described earlier?
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Old 08-11-2011, 10:02 PM
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Sounds like a clogged converter with the hissing and no vacuum to the brakes. You could pull the upstream o2's (before the cat) and see if that helps.It will give the exhaust somewhere to get out if the cats are clogged. Course it won't run the best for long without a reading from them(o2 sensors) but I should help see if they are clogged. If it doesn't at least the exhaust isn't hacked.
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Old 08-12-2011, 06:28 AM
JayDee240 JayDee240 is offline
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I Did reset the TPS sensor.

My thought on exhaust was, shouldn't it bog down when I rev quickly in neutral if the cats were blocked? I was going to pull the O2 sensors, then I decided it was just a waste of time since the truck idles perfectly fine. But at this point I suppose it's worth a try.
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Old 08-12-2011, 06:44 AM
fritzie001 fritzie001 is offline
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Sounds like your O2 sensor. Or a plugged cat converter to me.
It will idle smooth then get very rough and lacks power and also will sound like a miss and a hissing sound. I had a dodge that did that years back and I took out the O2 sensor and cleaned it in gas. Ran for awhile until i could get a new sensor.
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Old 08-12-2011, 06:44 AM
 
 
 
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