Idleing Noise
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Idleing Noise
I have a 1996 Ford F-250 PSD.
My truck idles at about 600 RPM. Every once in a while, at random times, it drops to about 500 RPM and makes a grinding noise. The whole truck shakes and it feels like everything is about to fall off. It only makes the grinding noise for about 5 - 10 seconds tops then goes back to its normal RPM's. It never stalls but it sure sounds like its going to. Like I said, it does it whenever it wants. It doesnt matter if I put it in neutral coasting down a street or its just idleing in the driveway. Thanks in advance for all feedback
My truck idles at about 600 RPM. Every once in a while, at random times, it drops to about 500 RPM and makes a grinding noise. The whole truck shakes and it feels like everything is about to fall off. It only makes the grinding noise for about 5 - 10 seconds tops then goes back to its normal RPM's. It never stalls but it sure sounds like its going to. Like I said, it does it whenever it wants. It doesnt matter if I put it in neutral coasting down a street or its just idleing in the driveway. Thanks in advance for all feedback
Logistics Pro
Joined: Jul 2001
Posts: 4,137
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From: Marble Falls, Texas
I would look at the A/C compressor. Turn the A/C on and get out and watch it engauge and disengauge. That's the only thing I can think of that would be intermittant like that.
RubberDuck
RubberDuck
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Originally Posted by RubberDuck
I would look at the A/C compressor. Turn the A/C on and get out and watch it engauge and disengauge. That's the only thing I can think of that would be intermittant like that.
RubberDuck
RubberDuck
Logistics Pro
Joined: Jul 2001
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From: Marble Falls, Texas
If you are standing at the grill, it is the upper right. The highest thing on the right with a pulley on it. With your A/C on, but not on Max A/C it should cycle on and off. Just stand out there and watch it. If it cycles on and off and you don't hear anything, I don't know where to go next.
RubberDuck
RubberDuck
Tuned
Joined: May 2004
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From: Mississippi
Originally Posted by Greatsaves28
I have a 1996 Ford F-250 PSD.
My truck idles at about 600 RPM. Every once in a while, at random times, it drops to about 500 RPM and makes a grinding noise. The whole truck shakes and it feels like everything is about to fall off. It only makes the grinding noise for about 5 - 10 seconds tops then goes back to its normal RPM's. It never stalls but it sure sounds like its going to. Like I said, it does it whenever it wants. It doesnt matter if I put it in neutral coasting down a street or its just idleing in the driveway. Thanks in advance for all feedback
My truck idles at about 600 RPM. Every once in a while, at random times, it drops to about 500 RPM and makes a grinding noise. The whole truck shakes and it feels like everything is about to fall off. It only makes the grinding noise for about 5 - 10 seconds tops then goes back to its normal RPM's. It never stalls but it sure sounds like its going to. Like I said, it does it whenever it wants. It doesnt matter if I put it in neutral coasting down a street or its just idleing in the driveway. Thanks in advance for all feedback
Sounds like the noise could be the dual mass flywheel going bad if you still have it. They will shake and make an awful noise. Check the rotational slack in it, it should be no more than 5/8".
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Originally Posted by 01stroker
Sounds like the noise could be the dual mass flywheel going bad if you still have it. They will shake and make an awful noise. Check the rotational slack in it, it should be no more than 5/8".
Tuned
Joined: May 2004
Posts: 250
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From: Mississippi
Originally Posted by Greatsaves28
How do I go about checking that? And thanks for all the replys so far!
Maybe this will help.
Good Luck!
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Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
I vote for the AC pump going out too. It's the only thing that will cycle on and off plus make enough drag to slow down the engine.
Note: Even in the wintertime and you are using defrost the AC will turn on. It's done that way by design because it's great for extracting moisture out of the air. It clears a foggy windshield much faster that way.
Note: Even in the wintertime and you are using defrost the AC will turn on. It's done that way by design because it's great for extracting moisture out of the air. It clears a foggy windshield much faster that way.
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Tuned
Joined: May 2004
Posts: 250
Likes: 1
From: Mississippi
Originally Posted by Kwikkordead
I vote for the AC pump going out too. It's the only thing that will cycle on and off plus make enough drag to slow down the engine.
Note: Even in the wintertime and you are using defrost the AC will turn on. It's done that way by design because it's great for extracting moisture out of the air. It clears a foggy windshield much faster that way.
Note: Even in the wintertime and you are using defrost the AC will turn on. It's done that way by design because it's great for extracting moisture out of the air. It clears a foggy windshield much faster that way.