Today's Message Index:
----------------------
1. 07:16 AM - Fuel Injector Questions for io-240 (FlyboyTR)
2. 10:22 AM - Re: Fuel Injector Questions for io-240 (FLYaDIVE)
3. 10:30 AM - Re: Fuel Injector Questions for io-240 (FlyboyTR)
4. 01:40 PM - Re: Re: Fuel Injector Questions for io-240 (FLYaDIVE)
5. 04:26 PM - Re: Fuel Injector Questions for io-240 (FlyboyTR)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Fuel Injector Questions for io-240 |
I have a question that has yet to be answered by any of our local A&P mechanics.
I fly behind an IO-240-B in my Experimental Skystar/Kitfox Vixen. My EGTs
no longer run really close to each other. They used to run within 25-30 degrees
of each other. Now the spread is upwards of 80-90 degrees at certain throttle
settings.
Two years ago I was having a rough idle. My A&P determined it was dirty injectors.
He removed them and cleaned them in an ultrasonic bath, blew them out and
returned them to service. The engine still idled rough. I ended up re-tuning
the fuel pressure setting and replaced the spark plugs. Idle issue solved!
However, I was puzzled that he did not keep the injectors in order (matched to
the cylinder).
I pulled these numbers from the TCM website for my engine. So I was sure they
must be flow matched to each intake tube/cylinder.
15A 632147-1178 NOZZLE TUNED CYL. # 1 4 I0240B4B 69_321
15B 632147-2178 NOZZLE TUNED CYL. # 2 4 I0240B4B 69_321
15C 632147-3178 NOZZLE TUNED CYL. # 3 1 I0240B4B 69_321
15D 632147-4178 NOZZLE TUNED CYL. # 4 1 I0240B4B 69_321
Yesterday I removed the four injectors only to find that all four are stamped 10J
(one, zero, Juliet). They are all the same! Are the 10J a one size fits all
injector for this engine? Why did my EGTs change after the injectors were
cleaned and returned to service?
The A&P says it doesnt matter. However, I usually run LOP at altitude. Now, once
I get the hottest cylinder LOPIve got one that really cool and get an occasional
lean burn misfire (a rough spot). BeforeI could lean the engine (at 75%)
all the way from peak to nothing (too lean to run) and my EGTs stayed really
close to each other.
I sure wish I had never allowed the A&P to remove the injectors in the first placewasnt
the original problem anyway!
Any insight into this mystery would be appreciated.
Travis
--------
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=291797#291797
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Fuel Injector Questions for io-240 |
Travis:
A parts cleaning fluid WILL NOT clean fuel injectors or primer injectors.
Go to a GUN SHOP and get a bottle of HOPPIE'S #9 gun cleaning fluid/solvent.
Remove the injectors and let them soak over night ... Do your primers
at the same time.
Matching the injector to the cylinder is NOT required.
They should ALL be the same size. If not WHY NOT!
When cylinders are flow-matched they are NOT run. Only air is used so
again injector size does not matter.
Barry
On Fri, Mar 26, 2010 at 10:16 AM, FlyboyTR <flyboytr@bellsouth.net> wrote:
>
> I have a question that has yet to be answered by any of our local A&P mechanics.
I fly behind an IO-240-B in my Experimental Skystar/Kitfox Vixen. My EGTs
no longer run really close to each other. They used to run within 25-30 degrees
of each other. Now the spread is upwards of 80-90 degrees at certain throttle
settings.
>
> Two years ago I was having a rough idle. My A&P determined it was dirty injectors.
He removed them and cleaned them in an ultrasonic bath, blew them out and
returned them to service. The engine still idled rough. I ended up re-tuning
the fuel pressure setting and replaced the spark plugs. Idle issue solved! However,
I was puzzled that he did not keep the injectors in order (matched to the
cylinder).
>
> I pulled these numbers from the TCM website for my engine. So I was sure they
must be flow matched to each intake tube/cylinder.
>
> 15A 632147-1178 NOZZLE TUNED CYL. # 1 4 I0240B4B 69_321
> 15B 632147-2178 NOZZLE TUNED CYL. # 2 4 I0240B4B 69_321
> 15C 632147-3178 NOZZLE TUNED CYL. # 3 1 I0240B4B 69_321
> 15D 632147-4178 NOZZLE TUNED CYL. # 4 1 I0240B4B 69_321
>
> Yesterday I removed the four injectors only to find that all four are stamped
10J (one, zero, Juliet). They are all the same! Are the 10J a one size fits all
injector for this engine? Why did my EGTs change after the injectors were cleaned
and returned to service?
>
> The A&P says it doesnt matter. However, I usually run LOP at altitude. Now, once
I get the hottest cylinder LOPIve got one that really cool and get an occasional
lean burn misfire (a rough spot). BeforeI could lean the engine (at 75%)
all the way from peak to nothing (too lean to run) and my EGTs stayed really
close to each other.
>
> I sure wish I had never allowed the A&P to remove the injectors in the first
placewasnt the original problem anyway!
>
> Any insight into this mystery would be appreciated.
>
> Travis
>
> --------
> Travis Rayner
> Mobile, AL
> Skystar Vixen, N-789DF
> Continental IO-240, Prince P-Tip Prop
> ADI-II Autopilot
> AnyWhereMap Navigation with weather
> www.enotam.net (My Flying Info Website)
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=291797#291797
>
>
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Fuel Injector Questions for io-240 |
Barry,
Thanks for the reply. I will try to find the fluid to mentioned. Sounds simple!
Do you have any idea why the TCM website would be showing four different injector
numbers for my engine...none of which are in mine?
Thanks again!
Travis :)
--------
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=291823#291823
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Fuel Injector Questions for io-240 |
Travis:
I'm not sure but here are a few passable reasons:
design change
change in material
sub-contractor specific part number
change in tracking system
change in fuel pressure due to a change in pumps
different size supply lines
a hidden AD
HP ... Maybe there is a HP increase with larger orifices
different orifice if the cylinders are over bored
These are just guesses. Give them a call.
Barry
On Fri, Mar 26, 2010 at 1:30 PM, FlyboyTR <flyboytr@bellsouth.net> wrote:
>
> Barry,
> Thanks for the reply. I will try to find the fluid to mentioned. Sounds simple!
>
> Do you have any idea why the TCM website would be showing four different injector
numbers for my engine...none of which are in mine?
>
> Thanks again!
>
> Travis :)
>
> --------
> Travis Rayner
> Mobile, AL
> Skystar Vixen, N-789DF
> Continental IO-240, Prince P-Tip Prop
> ADI-II Autopilot
> AnyWhereMap Navigation with weather
> www.enotam.net (My Flying Info Website)
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=291823#291823
>
>
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Fuel Injector Questions for io-240 |
Barry,
Excellent points. Thanks. I found the Hoppes #9. I'll give it a try and see
how it does! Thanks again!
Travis :D
--------
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=291880#291880
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|