Speedlow Error
08-02-2009 | 06:02 PM
#1
Thread Starter
Speedlow Error
Hey guys,
Didn't want to bother Eric on Sunday and I'm not at a rally or anyting so I thought I would post a question. On my Boomer XL, I've got a Rhino installed on it and I keep getting a "Speedlow" error at full throttle. This causes the ICS to shut down the turbine. I changed out the lead from the RPM sensor thinking it may be a bad lead. Nope, still does it. I re-trained the TX to the ICS and still get the problem. It runs for about a min or two and then flames out with the error.
Any ideas for me to check? This boomer has had Waaay to many flameouts. I'm starting to run on borrowed time.
Andy
Didn't want to bother Eric on Sunday and I'm not at a rally or anyting so I thought I would post a question. On my Boomer XL, I've got a Rhino installed on it and I keep getting a "Speedlow" error at full throttle. This causes the ICS to shut down the turbine. I changed out the lead from the RPM sensor thinking it may be a bad lead. Nope, still does it. I re-trained the TX to the ICS and still get the problem. It runs for about a min or two and then flames out with the error.
Any ideas for me to check? This boomer has had Waaay to many flameouts. I'm starting to run on borrowed time.
Andy
08-02-2009 | 06:29 PM
#3
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From: Daytona Beach
RE: Speedlow Error
Andy,
does it reach full power (max rpm) at full stick? Without my notes in front of me (been a long time since I have seen this error), I believe speed low means the fadec senses it is taking too long for the engine to reach full power or the RPM sensor is malfunctioning (meaning it is seeing lower RPM than minimum run reading, I think if it sees none it continues to run at a reduced max PW until the FADEC is powered off). Can you download the data an post the last run where it flamed out? Is this the recently repaired engine or a different one?
does it reach full power (max rpm) at full stick? Without my notes in front of me (been a long time since I have seen this error), I believe speed low means the fadec senses it is taking too long for the engine to reach full power or the RPM sensor is malfunctioning (meaning it is seeing lower RPM than minimum run reading, I think if it sees none it continues to run at a reduced max PW until the FADEC is powered off). Can you download the data an post the last run where it flamed out? Is this the recently repaired engine or a different one?
08-02-2009 | 06:47 PM
#4
Thread Starter
RE: Speedlow Error
its running full power. I tried another fadec and it does the same thing on the new fadec. I think its an RPM sensor. How do you DL the info? You mean like take a picture and post it?
08-02-2009 | 06:51 PM
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From: North Port,
FL
RE: Speedlow Error
Hello Andy:
Not bothering me on a Sunday is like not bothering me at all. I am here for you as well as any other customer.
Need to know the following. . .
1. PW and temp you receive with the speed low error message
2. Please check the connection to the ECU from the ROM sensor. . .make sure if you are using an extension for the RPM sensor, it is OK. Even new have been known to have an issue.
3. Speed low is directly related to temp, fuel pressure and RPM all must be within the parameters the processor is set to receive, diagnose and react accordingly.
4. Was there "smoke or no smoke" with the flame out
Last, you say you have had too many flame outs. Andy, you have all my numbers. . .I am perplexed as to why I have not heard of this prior to today.
If in doubt of the cause, you can send me the ECU, pump and turbine. I will bench run and if OK with you, fly as well. Let me know.
Best regards,
Eric
Not bothering me on a Sunday is like not bothering me at all. I am here for you as well as any other customer.
Need to know the following. . .
1. PW and temp you receive with the speed low error message
2. Please check the connection to the ECU from the ROM sensor. . .make sure if you are using an extension for the RPM sensor, it is OK. Even new have been known to have an issue.
3. Speed low is directly related to temp, fuel pressure and RPM all must be within the parameters the processor is set to receive, diagnose and react accordingly.
4. Was there "smoke or no smoke" with the flame out
Last, you say you have had too many flame outs. Andy, you have all my numbers. . .I am perplexed as to why I have not heard of this prior to today.
If in doubt of the cause, you can send me the ECU, pump and turbine. I will bench run and if OK with you, fly as well. Let me know.
Best regards,
Eric
08-02-2009 | 07:00 PM
#6
Thread Starter
RE: Speedlow Error
ORIGINAL: BluFox
Hello Andy:
Not bothering me on a Sunday is like not bothering me at all. I am here for you as well as any other customer.
Need to know the following. . .
1. PW and temp you receive with the speed low error message
PW was 432 Temp was 472C
2. Please check the connection to the ECU from the ROM sensor. . .make sure if you are using an extension for the RPM sensor, it is OK. Even new have been known to have an issue.
Was using extension. Changed out with new. New one does it. I tried another ECU and it did the same with the new ECU.
3. Speed low is directly related to temp, fuel pressure and RPM all must be within the parameters the processor is set to receive, diagnose and react accordingly.
no smoke on flameout
4. Was there ''smoke or no smoke'' with the flame out
Last, you say you have had too many flame outs. Andy, you have all my numbers. . .I am perplexed as to why I have not heard of this prior to today.
Thats b/c I haven't called. I was trying to diagnose myself. At MS afterburner I had several flamouts. I re-trained the TX and after that I had none.
If in doubt of the cause, you can send me the ECU, pump and turbine. I will bench run and if OK with you, fly as well. Let me know.
Best regards,
Eric
Hello Andy:
Not bothering me on a Sunday is like not bothering me at all. I am here for you as well as any other customer.
Need to know the following. . .
1. PW and temp you receive with the speed low error message
PW was 432 Temp was 472C
2. Please check the connection to the ECU from the ROM sensor. . .make sure if you are using an extension for the RPM sensor, it is OK. Even new have been known to have an issue.
Was using extension. Changed out with new. New one does it. I tried another ECU and it did the same with the new ECU.
3. Speed low is directly related to temp, fuel pressure and RPM all must be within the parameters the processor is set to receive, diagnose and react accordingly.
no smoke on flameout
4. Was there ''smoke or no smoke'' with the flame out
Last, you say you have had too many flame outs. Andy, you have all my numbers. . .I am perplexed as to why I have not heard of this prior to today.
Thats b/c I haven't called. I was trying to diagnose myself. At MS afterburner I had several flamouts. I re-trained the TX and after that I had none.
If in doubt of the cause, you can send me the ECU, pump and turbine. I will bench run and if OK with you, fly as well. Let me know.
Best regards,
Eric
09-02-2009 | 09:04 AM
#7
Thread Starter
RE: Speedlow Error
After completely going through all of the probable causes of the speedlow error it turns out that I was getting air in the fuel from the UAT causing a flamout. I noticed a hairline crack on the top of the plastic cap on the UAT that had not been discovered before. Once the turbine was at full throttle the increased pressure sucked air through that crack.
Replaced the UAT, 5 perfect flights later with no problems. Jet Central was willing to send me a RPM Sensor, but their engineering came back and asked me to recheck the fuel system one more time before sending it because their experience on the problem I was having was fuel related. Turns out they were right.
Thanks guys for your help resolving this issue.
Andy
Replaced the UAT, 5 perfect flights later with no problems. Jet Central was willing to send me a RPM Sensor, but their engineering came back and asked me to recheck the fuel system one more time before sending it because their experience on the problem I was having was fuel related. Turns out they were right.
Thanks guys for your help resolving this issue.
Andy
