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  #1  
Old 02-07-2008, 03:55 PM
Black8's Avatar
Black8 Black8 is offline
 
Join Date: Mar 2006
Location: Birmingham,Alabama
Posts: 62
Default Van's MP gauge

I am seeing some strange things on my Van's MP gauge. With engine not running and current baro at 30" or below my MP Gauge shows 31" or slightly higher. Also in flight if I pull the throttle to idle my MP reads zero! that is untill I've slowed down and bring up the power. Anyone out there having the same things happen? thanx, Joel McMillian
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  #2  
Old 02-18-2008, 05:04 PM
billy d billy d is offline
 
Join Date: Jan 2005
Posts: 43
Default MP Gauge

Mine goes toward zero when I key my comm. radio...I've learned to ignore it.
billy d
RV-6A, N86WD, Phase I nearly finished
Ocala, Fl FD04
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  #3  
Old 02-19-2008, 06:36 PM
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gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 4,285
Default nonchalant

Not uncommon but good? no. The RFI deal, when you key the mic, is common. People have overcome it (sometimes) with some fiddling, re-routing wires, separating wires and twisting of pairs (from transducer). The gauge it self might be picking up the radio signals as well. Try moving and twisting the transducer wires.

If you search these forums or others you will see dozens of post about this. I recall Van said something like the needle being pegged did not hurt it and is nonchalant about it, ie ignore it. I think the amp meter also has this tendency, to peg the needle when transmitting.

As far as accuracy the baro is corrected for temp and humidity so the MAP will be off slightly, but a full inch is a bit much.

Going to zero with idle throttle? That is not great either, sorry don't know what to tell you, but I am not surprised. I also recall from my reading the transducers and even the gauge displays often have a short life and get replaced. One guy went thru a few transducers.

Not bashing Van or his gauges but its just not uncommon with this product. To be fair there are lots of these MAP gauges out there and many don't seem to have issues or they are not complaining. Consider sending both the gauge and transducer back to to Van's to be checked. To Van's credit they are pretty good about taking care of problems like this. It's possible you just got a bad one (trans or gauge). The RFI deal however is acceptable to Van I recall.
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Last edited by gmcjetpilot : 02-19-2008 at 06:49 PM.
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  #4  
Old 02-21-2008, 05:56 PM
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Black8 Black8 is offline
 
Join Date: Mar 2006
Location: Birmingham,Alabama
Posts: 62
Default

Thanks for the replies. I'm not having any trouble with the gauge while transmitting. I used some huge sheilding around the wiring and have no problems. Thanks again.
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