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  #21  
Old 01-30-2018, 05:35 PM
vic syracuse vic syracuse is online now
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Try some Marvel mystery oil in the oil and in the fuel.

Vic
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  #22  
Old 01-30-2018, 06:18 PM
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Quote:
Originally Posted by vic syracuse View Post
Try some Marvel mystery oil in the oil and in the fuel.

Vic
I think what Vic meant to say was you should perform a valve wobble test to determine if you have a sticky valve
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  #23  
Old 01-30-2018, 07:37 PM
N23WL N23WL is offline
 
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Default TMX-360 Missing

The second solenoid was replaced today, bring the total to three since the aircraft was built. The solenoid was the problem and now, the low RPM missing has been resolved and confirmed with a lengthy ground and flight test.

This is the third solenoid on this aircraft and the second in a week to be replaced. One has to ask the question - how often do two solenoids fail? It is unusual, to say the least and brings about a question of whether there might be a culprit lurking in the electrical system, e.g., the alternator. Time will tell.

I hope that this experience might help others by encouraging ruling in/out a problem systematically (and with help) and NOT just replacing parts in an attempt to fix a symptom. Frustrating as it might be, investigate.

Thank all of you for all the help.
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  #24  
Old 01-30-2018, 07:52 PM
tim2542 tim2542 is offline
 
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What solenoid? You mean coil maybe?
I?m very curious to know how a solenoid could cause the engine to run rough....
Tim Andres
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  #25  
Old 01-30-2018, 08:28 PM
rv7charlie rv7charlie is offline
 
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He did say he has E-mags; IIRC the original version was dependent on ship's electrical power. So I'm guessing he's talking about the master solenoid.
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  #26  
Old 01-30-2018, 09:03 PM
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Quote:
Originally Posted by N23WL View Post
The second solenoid was replaced today, bring the total to three since the aircraft was built. The solenoid was the problem and now, the low RPM missing has been resolved and confirmed with a lengthy ground and flight test.

This is the third solenoid on this aircraft and the second in a week to be replaced. One has to ask the question - how often do two solenoids fail? It is unusual, to say the least and brings about a question of whether there might be a culprit lurking in the electrical system, e.g., the alternator. Time will tell.

I hope that this experience might help others by encouraging ruling in/out a problem systematically (and with help) and NOT just replacing parts in an attempt to fix a symptom. Frustrating as it might be, investigate.

Thank all of you for all the help.
Do you have the surge protection diodes on the solenoid? Van?s has them.

Surge protection diode for Master Switch
Part Number = ES DIODE MASTER
Price = $11.00

Bob
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  #27  
Old 01-30-2018, 09:52 PM
rv7charlie rv7charlie is offline
 
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FWIW, you can make either of those protection diodes with a couple of ring terminals and a 1N400x (substitute any number between 2 & 9 for the x). Available everywhere, from Radio Shack to the best electronic supplier. Total cost, under a buck, after you buy the shrink tubing to go over it.

To the OP:

I'm late to this party, but your answer was hiding in your 1st post. You should see minimal voltage drop through your various connections and switches and/or relays/contactors. Over 1 1/2 volts of drop from battery terminal to buss says something is wrong, unless you have isolation diodes in the mix somewhere. And always use the negative battery post (not the terminal; the actual post) as reference when you're doing voltage measurements.

Charlie
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  #28  
Old 01-31-2018, 03:18 AM
N23WL N23WL is offline
 
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Default TMX-36 Missing

Hello,

I will try to respond to some comments but only with my limited experience and learned knowledge on the subject.

I used he Van's Master solenoid and yes, it is protected and torqued to spec. I could NOT put the solenoid in with the recommended downward position because of space limitations. There is no space without a major rewire and new conduit through the firewall. That may affect the life of the solenoid.

Since I am using Van's parts and have encountered a failure on the second of three solenoids, I am watching to see if I encountered a fluke (solenoid failure) or do I need to look at other sources of possible spikes or down graded current.

Marvel mystery oil. Absolutely. I used t it now as both a fuel & oil additive.

E-mags? yes

Further testing? Scheduled for a high orbit f/ 1-2 hour flight today and if there is any mention of a miss, I'll report.

Thanks so much.
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  #29  
Old 01-31-2018, 05:36 AM
schaplerrh schaplerrh is offline
 
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Is the engine just "missing" or is there also "popping" or "backfire" sound when you throttle back?
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  #30  
Old 01-31-2018, 11:35 AM
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bret bret is offline
 
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These solenoids should last a long time unless.......you have a start relay in place of a hold relay-solenoid. one is for intermittent operation and one is designed to remain on continues duty......
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