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visionman

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  1. May have found problem in bad connection between sensor plug and harness. Not sure but playing at this connection seems to help. Thanks for the info, any ideas on the air system problem on the other unit?
  2. boost pressure drop is intermittent, don't know why intake plumbing would affect pressure side of the turbo. The code that shows up is always the turbo speed sensor. All components were in fact changed out. We have tried a second govenor, maybe we should try a new purge valve on the AD9 drier. It will blow off steady going down the road or sitting still, then it will work properly for a day. Can't figure out why it doesn't do it all the time.
  3. Have two 04 visions with the 460 and are havingturbo issues. The one unit is dropping boost pressure to the engine. We have changed the turbo speed sensor twice and are still loosing boost. One mechanic sugested that the turbo shaft is "floating" and maybe the sensor can't pick up the signal. Is this possible or do we need to be looking at something else? The second unit has air system problems with the drier blowing off every 20 seconds. This happens on and off, good for half a day then does it for a day etc. We recently changed the compressor, drier and govenor and have had the problem ever since. We have installed a second govenor and changed some lines to it. Don't think there are any leaks to be concerned about. A mechanic is wondering if we are loosing air at the turbo somewhere that is triggering the govenor. No visible air pressure drop is seen on the gauges, yet the compressor still kicks in. Any ideas or info that may help would be great. Would like to make sure we are certain of a few things before we get to changing these expensive turbo's.
  4. Have two 04 visions that I am told have turbo issues. One is the turbo speed sensor keeps cutting the boost pressure. We have tried two new sensors and still have the same problem. One mechanic mentioned maybe the turbo shaft is "floating" and the sensor is loosing the signal. Is this possible? The other one has air system troubles. The dryer is blowing off every 20 seconds, this doesn't happen constantly, but will be fine for half a day then start doing it again. We changed the compressor, dryer and govenor recently and have had troubles since. One mechanic is wondering if we are loosing air at the turbo some how and this is triggering the govenor. There is no visible air pressure drop on the gauges before it pumps again. Any ideas or comments would be great. Don't want to spend $4500 on a turbo and still have the problems.
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