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mrman
Dodge Dakota
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11/30/2004
10:39:10
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 Subject: 4.7L. struggles to get to 5K rpm
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2000 4.7L V8. It can barely make it to 5k rpm with the gas mashed to the floor in D. In N it barely makes it to 5500. What gives? bad cat? any ideas??
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daffydak
GenIII
11/30/2004
11:39:17
|  RE: 4.7L. struggles to get to 5K rpm
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sounds like maybe a plugged cat. does it make a rattling sound as well? I heard that the cat can make a rattling sound when it goes bad, or it can just plain plug up. if you have less than 80K on the truck, I think there is a federal emissions warranty that will cover replacing your converter.
just my .02
00 CC Sport Plus 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
Dan
MOPAR=More Power!!
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eddy
Dodge Dakota
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11/30/2004
11:47:22
| RE: 4.7L. struggles to get to 5K rpm
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Damn, definitely a problem of some sort. Fuel delivery problem maybe? My 4.7 jumps to 6 thousand rpm in a heart beat when I floor it.
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mrman
Dodge Dakota
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11/30/2004
12:12:37
| RE: 4.7L. struggles to get to 5K rpm
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The cat use to rattle, but that was quite a while ago.
I'd like to go to the dealer but I guarantee they'll say my mods caused the cat to fail.
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daffydak
GenIII
11/30/2004
14:06:11
| RE: 4.7L. struggles to get to 5K rpm
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ditto eddy. My truck screams to 6200 and smacks the rev limiter if I manually hold a gear :-)
The dealer would probably have a COW beause of your mods.. it may also be a fuel delivery problem, but I would check the CAT first. how many miles do you have on your truck? If you suspect the cat you can just hack it out for a day, and put a pipe in it's place (keep it like that long enough to see if that helps the problem) and if that helps, you can buy a high flow cat.... since you said the cat rattled a while ago, that it most likely what is causing the problem..
Hope I helped.
00 CC Sport Plus 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
Dan
MOPAR=More Power!!
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GraphiteDak
GenIII
11/30/2004
23:49:25
| RE: 4.7L. struggles to get to 5K rpm
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Mine has a lower rev limiter in park, like a little over 3k. It sucks.
Other than that it too hits the 6k rev limiter all the time when I hold it in gear.
Maybe you got just a tank of bad gas???
That CAN happen. It would be great if that is all it is.
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huh- oh
Dodge Dakota
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12/01/2004
16:20:46
|  RE: 4.7L. struggles to get to 5K rpm
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your tranny has a park?
I'm still looking for it, is it by the clutch pedal, where?
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mrman
Dodge Dakota
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12/03/2004
13:53:50
| RE: 4.7L. struggles to get to 5K rpm
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It was the cat. Got a new one today. Not a high flow unit but way better than the stock POS. That deep rumble is back and the motor screams to the rev limiter. Kick-ass!!!
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daffydak
GenIII
12/03/2004
14:17:54
|  RE: 4.7L. struggles to get to 5K rpm
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Glad to hear the 4.7 is screaming again :-)
Keep truckin!!
Dan
MOPAR=More Power!!
00 CC Sport Plus 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
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GraphiteDak
GenIII
12/04/2004
01:00:45
| RE: 4.7L. struggles to get to 5K rpm
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I'm curious.
How many miles did you have before your cat plugged like that?
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mrman
Dodge Dakota
JOIN HERE
12/04/2004
10:18:14
| RE: 4.7L. struggles to get to 5K rpm
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I've got 57k miles on my Dak.
Damn it sounds sooooo good now.
'00 4x4 Intense Blue CC
4.7L auto 3.55s
IntensePerformance Z-tube
Fastman 68
Autolite 3923s
KenneBell Optimizer II
Gibson Shorty headers/sweptside catback
PowerTrax no-slip
TPS .74v
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