New to the forum. Limp mode problem

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Rumblebee

Junior Member
Joined
May 28, 2015
Posts
14
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Ram Year
2004
Engine
5.7 Hemi
I have a 04 Rumble Bee 4X4. I have a CAI and no cats. No other mods except a emissions delete tune that allowed me to remove the cats and EGR without any codes.
The first time it did this was before I did anything to it and it had all the factory parts/tune. I was driving through about a foot of water to get to a flooded parking lot. I was driving extremely slow and never went deeper that the center of the wheel hubs. It flashed the throttle control light and only had second gear. I killed the truck and restarted it and all was well.
The second time it did it, I drove through a very small puddle and turned onto a busy street. I tried to get on it then the lightning bolt started flashing again. Once again, killed it, restarted, good to go.
Third time had no water involved. I simply pulled out on a busy street after sitting in a drive thru and it did it again. I was able to put it in neutral and restart it while driving and had no issue.
The occurences are getting closer together so I'm thinking I have a problem. I never have any codes pop up, but It doesn't run right. I can take off half throttle sometimes and it feel like my old Z28 Camaro. Other times I feel like it's struggling to get going and the tranny is shifting late like it's in passing gear mode but it's not accelerating like it should. It's like you keep giving it gas and it just stays at a steady speed until you get to the floor. Then it tries to snap your neck. It has a weird shake too when it comes to a stop after warming up. It seems to idle at 500rpm when it shakes. If you touch the gas when you're sitting still in gear, it idles up to 600rpm and the shake goes away. That might be a spark plug issue as the wires look like their old as hell and probably weren't replaced when the previous owner replaced the engine a few months before selling it to me.
It doesn't run bad most of the time. It gets 17-19 mpg driving easy and keeping it under 75, it's just getting annoying and Ii haven't been able to find anyone who knows what the problem is.
 

cgreenwood76

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May 18, 2015
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Location
Arkansas
Ram Year
2012 Lone Star
Engine
Hemi 5.7
I'd start testing sensors first, starting with the tps. Also may as well change plugs and wires since you mentioned the wires look old.
 
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Rumblebee

Junior Member
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May 28, 2015
Posts
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Ram Year
2004
Engine
5.7 Hemi
I figured the TPS could be bad without flashing a code. Certainly sounds possible. I'm just used to my Chevy that gives me a code if a strong gust of wind blows through the MAF sensor. I'm not too terribly familiar with this Chrysler products lol.
 
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Rumblebee

Junior Member
Joined
May 28, 2015
Posts
14
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Ram Year
2004
Engine
5.7 Hemi
Well crap. TPS is reading 85.6% with foot to the floor. The reverse TPS reading isn't even registering at all
 

Arians

Junior Member
Joined
Jun 8, 2015
Posts
19
Reaction score
0
Ram Year
2002
Engine
5.9
I had this problem with my 02 ram 1500 5.9 turned out to be a bad PCM i was just lucky the dealer paid to fix it because it took 2 different PCM's to get the problem fix. My symptoms were acting like your starting out in 2nd gear and not going into overdrive ( staying in passing gear)
 
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