idle problems
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Captain
Joined: Jan 2011
Posts: 703
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From: Northern Ontario
idle problems
Hello. I have a 1998 dodge ram 1500 5.2L that I am currently fixing. It's been a project truck and hasnt left the shop so I don't know how it runs when it's going down the road. Anyways, the truck will start and idle fine but after I rev the truck in park, the rpms will drop to roughly 300 (Truck doesnt have rpm guage) and then it will go back up to normal and idle fine. Doesn't have to be much of a rev. It shouldn't drop this low and then go back to normal like that. During this period, the truck almost stalls (hasn't yet) and the interior lights go dim because its just barely running. The truck doesn't have any codes coming up or any dash lights on. I'm thinking it may be the MAP sensor, TPS or 02 sensor.
What do you guys think?
What do you guys think?
Legend
Joined: Jul 2011
Posts: 8,259
Likes: 4
From: Austin, TX
Possibly IAC and/or TPS. Disconnect battery ground. Remove throttle body and then IAC and clean (do not twist pintle) and clean out IAC port. Reconnect battery and drive it for a bit ans see if that does it.
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Joined: May 2008
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From: NH
Thread Starter
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Captain
Joined: Jan 2011
Posts: 703
Likes: 0
From: Northern Ontario
Thanks guys. It turns out it was the IAC. I didnt change it but I disconnected the battery, took it out and cleaned it and inside the port then put it back together. Now when I rev it, the rpms don't drop below what they should. However, once I take my foot off the gas, there is a 1 second delay before it drops. Not sure what that is. I'm thinking that this problem may be tps related. But in the big picture of things, it's not really a big deal.
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
Glad you got her fixed.
On a side note, When you post a thread in the "tech" section , in the future, would you please make a better title. So that anyone searching for the same or similar issue as yours , will find it. I'm pretty sure no one will do a search for "Weird Issue. Please help."
I'm going to change your thread title to "idle problems" if that's ok with you.
On a side note, When you post a thread in the "tech" section , in the future, would you please make a better title. So that anyone searching for the same or similar issue as yours , will find it. I'm pretty sure no one will do a search for "Weird Issue. Please help."
I'm going to change your thread title to "idle problems" if that's ok with you.
