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JerryM
Dodge Dakota
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6/11/2007
16:07:40
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 Subject: 2000 4.7 liter engine idle
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Message:
This morning while driving home, when coming to a stop the engine idle dipped to about 500 rpm. It almost seemed like the engine stalled, but it was still running ok.
Was wondering if that is normal, and what other owners 4.7 liter idle runs.
Thanks!
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Kowalski
GenIII
6/11/2007
16:27:09
| RE: 2000 4.7 liter engine idle
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Message:
Might be time to clean the IAC (idle air control). It shouldn't feel like it's going to die. Could also be a bad TPS (throttle position sensor).
Lead, follow, or get out of the way
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kj
Dodge Dakota
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6/12/2007
15:45:11
| RE: 2000 4.7 liter engine idle
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Message:
My 2000 has done that since new. I've never changed anything and I'm closing in on 95,000 miles.
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JerryM
Dodge Dakota
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6/12/2007
16:35:19
| RE: 2000 4.7 liter engine idle
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Message:
KJ,
So your truck at idle has been runnning 500 rpm since new?
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Kowalski
GenIII
6/12/2007
17:40:43
| RE: 2000 4.7 liter engine idle
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Message:
Some do idle pretty low, and the rpm from the stock tach can't be considered perfectly accurate - but it shouldn't normally feel like it's going to die, as you said.
Lead, follow, or get out of the way
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Dan C
Dodge Dakota
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6/13/2007
00:54:04
| RE: 2000 4.7 liter engine idle
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Message:
My 2000 4.7 also does this occasionally after stopping at a light. It dips to around 500rpm very quickly, then back up to a steady 625rpm. Has done this since I purchased it back in 2002 with 30,000 miles (now at 80,000 miles). I cleaned the throttle body and IAC solenoid, with no change.
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GraphiteDak
GenIII
6/13/2007
12:20:29
| RE: 2000 4.7 liter engine idle
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Message:
The engine does idle pretty slow. Mine always did but I never "feel" like it's going to die.
If it feels rough enough then the IAC may be sticky or the TPS worn like someone already said. If you are only noticing the low RPM's by looking at the tach and the sound of the exhaust then I wouldn't worry about it.
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CA quadman
Dodge Dakota
JOIN HERE
6/13/2007
12:32:30
| RE: 2000 4.7 liter engine idle
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Message:
It's the TPS. Had the exact same prob. $30 Napa. Easy to replace. 10min.
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JerryM
Dodge Dakota
JOIN HERE
6/13/2007
17:07:46
| RE: 2000 4.7 liter engine idle
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Message:
Maybe running at 500 rpms is OK, I am just not used to it dipping that low. The engine actually ran good but it quiet down, leading me to think it might have stalled.
Thanks for everyones input. For now I'll keep an eye on it unless it's causes problems
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dan
Dodge Dakota
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6/29/2007
11:02:51
| RE: 2000 4.7 liter engine idle
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Message:
I have a 2001 with almost the same problem. If i run the motor in park, the idle runs up and then runs back down. I started to notice the same problem down the highway. Any ideas?
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Kowalski
GenIII
7/10/2007
18:29:08
| RE: 2000 4.7 liter engine idle
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Message:
Could be bad TPS.
Lead, follow, or get out of the way
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dan
Dodge Dakota
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7/10/2007
18:59:18
| RE: 2000 4.7 liter engine idle
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Message:
I started to notice if i have the a/c on and cruise control also on, the throttle will go up and down. TPS?
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Kowalski
GenIII
7/11/2007
16:13:47
| RE: 2000 4.7 liter engine idle
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Message:
Quite possible, you could check for fluctuating output with a voltmeter if you want to be sure.
Lead, follow, or get out of the way
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Mr.Sleepy
Dodge Dakota
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7/11/2007
22:51:02
| RE: 2000 4.7 liter engine idle
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Message:
My 2002 4.7 with 105k miles on it has been doing this since about 40k miles. It's stalled out completely two times, but thats out of hundreds of times it dips to 500. Lots of times it stays there until I launch again, and seems to have no negative effect save for a slightly rougher idle.
If a $30 fix from NAPA can remedy it, I'd say it would be worth it. I'll try it and report back. But as of now, I can definitely say that you aren't the only one experiencing this problem.
BTW - Cleaned out the Throttle body completely, replaced it with a bored out one, cleaned all the sensors, and had a tune up, no effect on the low idle. So save your cash.
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jackie
Dodge Dakota
JOIN HERE
10/11/2015
12:23:33
| RE: 2000 4.7 liter engine idle
IP: Logged
Message:
truck was running fine when i got home got back in 2 min later starts ok but will not idle or rev up acts like it is starved for fuel
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