PCV's ruining the ECM's? Whats wrong with my bike?
#11
08-04-2011, 10:38 PM
#12
08-04-2011, 10:45 PM
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#13
08-04-2011, 10:49 PM
I'd have to agree with this..
Looks like the information goes from the ECM to the PC to the bike.
If it was sending info into the ECM I could see the claim that the PC messed up the ECM.
I did have a service tech at my dealer tell me that the PC uses the ECM as a ground though and any electrical glitches in the PC system could fry the ECM.
I have no idea if that's true, just relaying what I was told.
Looks like the information goes from the ECM to the PC to the bike.
If it was sending info into the ECM I could see the claim that the PC messed up the ECM.
I did have a service tech at my dealer tell me that the PC uses the ECM as a ground though and any electrical glitches in the PC system could fry the ECM.
I have no idea if that's true, just relaying what I was told.
But.. the same tech said that if I put the PC on my bike, my warranty was instantly voided. Really doubt that is true.
#14
08-05-2011, 12:27 AM
Someone in an earlier thread said he emailed DynoJet and was told this could not happen and Jamie at FM has already stated that he's never seen a verifiable case where this has occurred. I believe their statements since I've seen no evidence that would prompt me to believe otherwise.
Well, that tells me something about the tech right there. Ask him to put that in writing, as such a policy would violate the Magnuson-Moss Warranty Act. Ask him about using synthetic oil in your engine and he'll probably warn you that it will make your bearings skate and destroy your engine.
Well, that tells me something about the tech right there. Ask him to put that in writing, as such a policy would violate the Magnuson-Moss Warranty Act. Ask him about using synthetic oil in your engine and he'll probably warn you that it will make your bearings skate and destroy your engine.
#16
08-05-2011, 06:50 AM
Road Master
#17
08-05-2011, 06:52 AM
Road Warrior
First off, I have no data or supporting evidence to support my following claim. Having run a PC on my last 2 bikes (PC III and PCV) for over 100K, I had water problems in the PC III connector (was able to finally wrap in plastic and keep it dry) and then I had cutting out problems with the PCV. Also the PCV would not allow my tach to respond beyond 5,000 RPM. I decided on this new bike not to have a piggyback system on the ECM and went with a SEPST, along with a Dynotune. Now after 6K with the SEPST I have had none of the above problems and I just rode 300 miles yesterday with speeds between 45-70 and got 49.6 mpg. I am happy with the SEPST and (knocking on wood) hope to have no issues going forward. This bike is the smoothest running Harley I have ever owned. Again I can't explain why, because to be honest I am not schooled on how to tune these new electronic tuners, just my experience.
#18
08-05-2011, 06:58 AM
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#19
08-05-2011, 07:29 AM
Road Warrior
I can not say that I have seen a pc damage the ECM...But I have had bikes towed to the shop that would not crank and have multiple eng. codes...I would disconect the power commander crank the bike and the codes would disappear...I am not saying it is a bad product...But I have seen my share of failures with them...We have to remember that any electronic product on a motorcycle is in a hostile environment... The heat ...vibration....the moisture...Plus after seeing some of the rats nest of wires that have been added under the seat of some of these bikes by adding glo lights and any electricle gadget that can be added...I can't believe that they haven't had a total melt down.
