Where's the beep?
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Mountain Pass
Joined: Jan 2005
Posts: 109
Likes: 3
Where's the beep?
I have an '03 Screw which I've noticed now has an intermittent muted beep coming from somewhere in the interior of the vehicle. I've had the truck for 9 years, and this is the first time I've noticed it. It seems to come randomly but no more frequent than 2-3 minutes apart. As I am typically driving the vehicle, I cannot stop to locate the source. It reminds me of the low battery beep on my Blackberry, but like it's tucked away in the console or glove box (I checked - it's not the BB...).
I have a recurring SES light which is attributed to cylinders 1&4 misfire (discussed at length in a different thread), but I don't know what would cause this beep. I have read about the 5x5 "airbag light" beep, but this doesn't seem consistent with that. It does not seem like a repeating pattern - just a single beep, which sometimes varies slightly in length but is consistent in pitch and volume.
Anyone here ever experience something like this? It's another thing in the growing list of gripes that are pushing me toward selling it. Just afraid of something big coming along unexpectedly... trying to manage the little things so they don't turn into that big one.
Thanks in advance...
I have a recurring SES light which is attributed to cylinders 1&4 misfire (discussed at length in a different thread), but I don't know what would cause this beep. I have read about the 5x5 "airbag light" beep, but this doesn't seem consistent with that. It does not seem like a repeating pattern - just a single beep, which sometimes varies slightly in length but is consistent in pitch and volume.
Anyone here ever experience something like this? It's another thing in the growing list of gripes that are pushing me toward selling it. Just afraid of something big coming along unexpectedly... trying to manage the little things so they don't turn into that big one.
Thanks in advance...
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Mountain Pass
Joined: Jan 2005
Posts: 109
Likes: 3
Maybe it's a squeak...
The sound may actually better be described as a subtle, short squeak - similar to the sound a vacuum motor might make when actuating.
I have been able to detect a correlation between the sound I'm hearing and driving behavior. After driving with moderate acceleration, then letting up on the gas, I can somewhat repeatably cause the sound to occur. In light of the fact that the sound reminds me of a vacuum motor squeak, and the times I hear it would be during a high vacuum on the manifold, I am wondering if it's a problem of vacuum leaking from the accumulator. I haven't noticed air dampers moving to their "no vacuum" state, so I don't think it's a severe leak, but one which allows a slight movement on one of the vacuum actuators.
I haven't done any inspection of the vacuum lines, but wondered if anyone here has had experience chasing vacuum leaks in the cab.
I have been able to detect a correlation between the sound I'm hearing and driving behavior. After driving with moderate acceleration, then letting up on the gas, I can somewhat repeatably cause the sound to occur. In light of the fact that the sound reminds me of a vacuum motor squeak, and the times I hear it would be during a high vacuum on the manifold, I am wondering if it's a problem of vacuum leaking from the accumulator. I haven't noticed air dampers moving to their "no vacuum" state, so I don't think it's a severe leak, but one which allows a slight movement on one of the vacuum actuators.
I haven't done any inspection of the vacuum lines, but wondered if anyone here has had experience chasing vacuum leaks in the cab.
Last edited by wbnethery3; Jan 9, 2014 at 09:38 AM. Reason: typo
Cross-Country
Joined: Oct 2005
Posts: 82
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I once dropped a digital pocket watch down the dash of a Peterbilt. As luck would have it everyday at 11am the alarm would sound off on that watch lol. Took 5 years for the battery to finally die.
Could a kid have dropped a toy some where?
Could a kid have dropped a toy some where?
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Mountain Pass
Joined: Jan 2005
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I've resigned myself to this being a vacuum motor which just has a little squeak in it... even when I'm not switching the dampers, it apparently has enough play in it that it moves slightly as I let up on the throttle and vacuum increases. I disconnected the vacuum line from the accumulator after the truck was off and sitting for quite a while, and there was still plenty of vacuum, so I don't think it's a leak. I think this is one I'm not going to win... when I sell it, I'll just need to make sure the radio's on... or act like it's my Blackberry with a low battery.
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Mountain Pass
Joined: Jan 2005
Posts: 109
Likes: 3
It's gone - odd coincidence or did Bar's Leak fix it?
I recently used Bar's Leak to correct a known head gasket leak, and it seems to have cleared up this little squeaking problem as well... is it possible that the Bar's Leak stopped a vacuum leak around the intake manifold as well? Is there any way for an intake leak to happen at the same time as a head gasket leak, or possibly get exhaust gas back into the intake and result in this weird behavior?
I had it at the dealer to investigate a misfire, which is how I learned that I had a head gasket leak. I suppose it's also possible they did something that remedied this funny noise... anyway, it's gone... for now at least.
I had it at the dealer to investigate a misfire, which is how I learned that I had a head gasket leak. I suppose it's also possible they did something that remedied this funny noise... anyway, it's gone... for now at least.
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