05 RAM 4.7 Idle issues...going crazy, tried everything
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Registered User
Joined: May 2011
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It seems like the passenger side manifold seems to have issues more than the driver side for some reason. Look for signs of carbon around a port from a leak and for broken bolts/studs.
As for locating a vacuum leak, I use an unlit propane touch and go around the intake, throttlebody, to see if the idle changes. If so, you have found your leak.
I am guessing you gave unhooked the battery for awhile to reset the PCM so it can relearn driving habits? While it is unhooked, remove each of the plugs on the pcm under the hood ans look for any loose pins or corrosion.
As for locating a vacuum leak, I use an unlit propane touch and go around the intake, throttlebody, to see if the idle changes. If so, you have found your leak.
I am guessing you gave unhooked the battery for awhile to reset the PCM so it can relearn driving habits? While it is unhooked, remove each of the plugs on the pcm under the hood ans look for any loose pins or corrosion.
I have reset the battery in the past, but only for about ten mins. I just got home and sprayed the top of the throttle body really good with carb cleaner and it idled down a lot and got normal for a few seconds. But on top of the throttle body? Yes, the rubber hose is tight but that shouldnt matter with the MAF in the throttle body, right?
I appreciate the replies and Im going to test that spray in the spot again tommorow and for the exhuase leak
Thread Starter
|
Registered User
Joined: May 2011
Posts: 6
Likes: 0
It seems like the passenger side manifold seems to have issues more than the driver side for some reason. Look for signs of carbon around a port from a leak and for broken bolts/studs.
As for locating a vacuum leak, I use an unlit propane touch and go around the intake, throttlebody, to see if the idle changes. If so, you have found your leak.
I am guessing you gave unhooked the battery for awhile to reset the PCM so it can relearn driving habits? While it is unhooked, remove each of the plugs on the pcm under the hood ans look for any loose pins or corrosion.
As for locating a vacuum leak, I use an unlit propane touch and go around the intake, throttlebody, to see if the idle changes. If so, you have found your leak.
I am guessing you gave unhooked the battery for awhile to reset the PCM so it can relearn driving habits? While it is unhooked, remove each of the plugs on the pcm under the hood ans look for any loose pins or corrosion.
I have actually left the battery unhooked for 2 days recently and its always better until a few days later..so that does make me lean towards the PCM.
Would the idle go down or up when checking with carb cleaner or propane?
If I just swap the PCM for a new one, what will be the result? I am told by the dealer that I would have to have it flashed there with the mileage or it could not run or set the check engine light???
Veteran
Joined: Jun 2004
Posts: 332
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From: North Jersey
I also had idle problems and was fixed with a change of Throttle positioning sensor. Rock Auto has some good prices.
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Joined: May 2008
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From: Louisville, Ky
I have reset the battery in the past, but only for about ten mins. I just got home and sprayed the top of the throttle body really good with carb cleaner and it idled down a lot and got normal for a few seconds. But on top of the throttle body? Yes, the rubber hose is tight but that shouldnt matter with the MAF in the throttle body, right?
I appreciate the replies and Im going to test that spray in the spot again tommorow and for the exhuase leak
I appreciate the replies and Im going to test that spray in the spot again tommorow and for the exhuase leak
The idle will change with an unlit propane torch as well. It may go up or down, but if it changes at all, you have a vacuum leak.
It uses a MAP sensor not a MAF. It reads intake vacuum.
