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Reload this Page Low CHT and low EGT on cylinder #1
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Old 07-24-2013, 06:17 PM
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celstar celstar is offline
 
Join Date: Aug 2007
Location: Two Rivers, WI
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Default Low CHT and low EGT on cylinder #1
Ok, just out of a very good and no problem annual. After the annual done by a A&P I have been flying a bit and thinking that I have some backfire on deceleration coming in from flying around. More then I remember and has been to the point of being able to feel the plane miss or hesitate a bit but only at low rpm flying. So we changed my plugs out both top and bottom, top EI Lightspeed 3 and bottom mag. Took it back up and seemed to be back to normal and great. Put another 1 hour or more on it now and seems to have come back, I then started looking at CHT and EGT and noticed in cruise my number #1 cylinder's EGT and CHT are 100 degrees or more lower then the rest. Any ideas?
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David Herrmann
RV-7 N174DH built and sold
RV-8A N369DP purchased and flying/ Sold
RV-8 N3170L purchased and flying/ Sold
RV-3B N313RV purchased and flying Sold
RV-4 N488TW Flying Sold
1946 J3Cub all stock and original flying Sold
1943 Meyers OTW-160 sold
1997 RV-4.5 N221TM wow, sold ��
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  #2  
Old 07-24-2013, 07:28 PM
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Mike S Mike S is offline
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Carb or F.I.??
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #3  
Old 07-24-2013, 07:31 PM
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celstar celstar is offline
 
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Posts: 278
Default Carb
Sorry, carb.


Quote:
Originally Posted by Mike S View Post
Carb or F.I.??
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David Herrmann
RV-7 N174DH built and sold
RV-8A N369DP purchased and flying/ Sold
RV-8 N3170L purchased and flying/ Sold
RV-3B N313RV purchased and flying Sold
RV-4 N488TW Flying Sold
1946 J3Cub all stock and original flying Sold
1943 Meyers OTW-160 sold
1997 RV-4.5 N221TM wow, sold ��
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  #4  
Old 07-25-2013, 07:43 AM
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airguy airguy is offline
 
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Check for an induction leak - if that cylinder is running very lean it would explain both the low temps and the backfiring.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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  #5  
Old 07-25-2013, 08:17 AM
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celstar celstar is offline
 
Join Date: Aug 2007
Location: Two Rivers, WI
Posts: 278
Default Low CHT and EGT
I thought that if it was a induction leak I would have low CHT but higher EGT?


Quote:
Originally Posted by airguy View Post
Check for an induction leak - if that cylinder is running very lean it would explain both the low temps and the backfiring.
__________________
David Herrmann
RV-7 N174DH built and sold
RV-8A N369DP purchased and flying/ Sold
RV-8 N3170L purchased and flying/ Sold
RV-3B N313RV purchased and flying Sold
RV-4 N488TW Flying Sold
1946 J3Cub all stock and original flying Sold
1943 Meyers OTW-160 sold
1997 RV-4.5 N221TM wow, sold ��
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  #6  
Old 07-25-2013, 08:26 AM
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Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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All depends on how bad the leak is.

Get enough air in there, and it will not fire at all.
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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