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wvu(at)ameritel.net
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 Posted: Sat Nov 04, 2006 4:36 pm Post subject: Engine trouble shoots/Update |
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Thanks to all who chimed in. Ran the engine (0SMOH D4A5) again today with the help of
a local mechanic. Below are updates, only item 3 is still problematic:
1. Fuel Pressure read 2.2psi at 1700rpm with boost pump off. 2.3psi
with the boost pump on. A little low don't you think?
Reprograming the EIS-6000 fixed it.
2. Mags check resulted in about 100rpm drop on both mags. Normal. Still the same
3. EGT on only #2 and #4 are high ~1500deg at 1700rpm. What up with this?
Same reading today. The mechanic confirmed CHT's on #2 &4 are also higher than the rest.
He felt for sure there's a small lint or something inside the #2 and #4 injector lines going
to the fuel distributor on top of the engine. He was surprised that I don't have a
gascolator. Anyone installed a gascolator? and where is a convenient place to put it that
gives access for draining. And what kind of filter is that that came with Van's fuel pump
(Fuel Flow Performance). i.e. do you need a gascolator on top of this filter?
4. When cycling the prop lever MAP does not decrease during the first
inch as I was pulling the lever back. Is this normal? No update.
5. Pulling the mixture to idle cutoff resulted in no increase in rpm
before the engine quits - engine runs lean. Richened the adjustment on
the fuel servo one full turn in the direction of the "R-->"caused the
engine to run rough and quit after a few seconds at 1700rpm. That was
pro'ly too aggressive an adjustment but did I turn it in the correct
direction?
Yesterday I though the engine ran lean. Today the mechanic thought my engine rans rich.
Minor leaning of the mixture resulted in a small 20rmp rise before the engine quits.
I couldn't hear the 20rpm difference but he did.
6. Electrical system read 11.7V and -4Amp as measure by GRT EIS.
Hall effect sensor is installed on battery side. Cycling ALT switch
didn't appear to make a difference. Will check wiring.
Loose plug on the back of the alternator. Didn't realize there's a locking tab on
top of the plug to prevent it from backing out. It read 14.5V/4Amp today.
Anh
#141
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coop85(at)bellsouth.net
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| Posted: Sun Nov 05, 2006 3:34 pm Post subject: Engine trouble shoots/Update |
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I’ve got some thoughts on two of your issues. The gascolator is no factor and I think very few (if any) are installing them on the -10. My DAR (a very experienced guy that runs an A&P university) said since our fuel sump drains are the absolute lowest point in the system then a gascolator wouldn’t be of any benefit. Mostly important for high wing airplanes.
On the prop control movement, I have a thought but it’s not based on anything scientific. I have the same response, although not quite a full inch before the prop responds. Since the prop is in high RPM and therefore full flat, it’s the throttle that’s increasing the RPM, since we stop it at whatever RPM you do your run-up at, then you are going to have to move the prop control back far enough to get to the point where it would finally command less RPM than you already have. Even at 2200 RPM you have to move it a ways before anything happens since it would happily be allowing 2500-2700 depending on the engine if there was enough power available. Hope that makes sense. If not, perhaps you can just rest well knowing that it’s all probably just fine. If you get the same response at a full power static run, then I would say something was amiss.
Marcus
40286 – rapidly approaching 100 hours TT
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of DejaVu
Sent: Saturday, November 04, 2006 7:33 PM
To: rv10-list(at)matronics.com
Subject: Re: Engine trouble shoots/Update
Thanks to all who chimed in. Ran the engine (0SMOH D4A5) again today with the help of
a local mechanic. Below are updates, only item 3 is still problematic:
1. Fuel Pressure read 2.2psi at 1700rpm with boost pump off. 2.3psi
with the boost pump on. A little low don't you think?
Reprograming the EIS-6000 fixed it.
2. Mags check resulted in about 100rpm drop on both mags. Normal. Still the same
3. EGT on only #2 and #4 are high ~1500deg at 1700rpm. What up with this?
Same reading today. The mechanic confirmed CHT's on #2 &4 are also higher than the rest.
He felt for sure there's a small lint or something inside the #2 and #4 injector lines going
to the fuel distributor on top of the engine. He was surprised that I don't have a
gascolator. [b]Anyone installed a gascolator? and where is a convenient place to put it that [/b]
[b]gives access for draining. And what kind of filter is that that came with Van's fuel pump[/b]
[b](Fuel Flow Performance). i.e. do you need a gascolator on top of this filter?[/b]
4. When cycling the prop lever MAP does not decrease during the first
inch as I was pulling the lever back. Is this normal? No update.
5. Pulling the mixture to idle cutoff resulted in no increase in rpm
before the engine quits - engine runs lean. Richened the adjustment on
the fuel servo one full turn in the direction of the "R-->"caused the
engine to run rough and quit after a few seconds at 1700rpm. That was
pro'ly too aggressive an adjustment but did I turn it in the correct
direction?
Yesterday I though the engine ran lean. Today the mechanic thought my engine rans rich.
Minor leaning of the mixture resulted in a small 20rmp rise before the engine quits.
I couldn't hear the 20rpm difference but he did.
6. Electrical system read 11.7V and -4Amp as measure by GRT EIS.
Hall effect sensor is installed on battery side. Cycling ALT switch
didn't appear to make a difference. Will check wiring.
Loose plug on the back of the alternator. Didn't realize there's a locking tab on
top of the plug to prevent it from backing out. It read 14.5V/4Amp today.
Anh
#141
[quote]
---
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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KiloPapa
Joined: 24 May 2006
Posts: 142
Location: Pearblossom, CA
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| Posted: Mon Nov 13, 2006 7:41 am Post subject: Engine trouble shoots/Update |
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Good job on the troubleshooting.
Kevin
40494
tail/empennage
do not archive
[quote][b]
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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_________________
Kevin
40494
do not archive |
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