one more pcv question...
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Road Master
Joined: May 2009
Posts: 1,180
Likes: 3
From: utah
one more pcv question...
So I have the pc v installed and the bike is running much better. Looking a little closer, those of you that suspected an exhaust leak may be right. So I took it into the dealer to have them take a look. Of course no service people on today. I was talking with their parts guy and told him I put the pc v on. He said to be careful with the pc v because it bypasses the o2 sensors and that could do some damage. Any truth to that?
Seasoned HDF Member
Joined: Oct 2007
Posts: 56,052
Likes: 89,226
From: Western South Dakota
Just don't have your o2 sensors hooked up.
You'll be fine.
Been runnin' mine for 3.5 years.
No issues.
Do not listen to your dealer's BS about the PC-V.
They hate them, because they cannot compete w/them.
You'll be fine.
Been runnin' mine for 3.5 years.
No issues.
Do not listen to your dealer's BS about the PC-V.
They hate them, because they cannot compete w/them.
Thread Starter
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Road Master
Joined: May 2009
Posts: 1,180
Likes: 3
From: utah
Kind of what I figured. It seems like many of you swear by the pcs. I stopped by because they installed my pipes so if they're leaking they're supposed to be repaired under warranty.
Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
Many of the aftermarket tuners no longer use the signal from the oxygen sensors, and operate in "open loop" all the time instead. Personally, I don't know if losing the ability to cruise in closed loop, using the feedback from the oxygen sensors, is something I'd want to give up.
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Road Master
Joined: May 2009
Posts: 1,180
Likes: 3
From: utah
So some interesting insight at the dealer today. The exhaust leak is fixed and on another 95 degree day I didn't notice it pop once! Running the best it ever has.
The flipside. My check engine light is on. Take it back and it turns out one of the o2 sensors is screwy! Yay, another trip to the dealer because they didn't have an o2 sensor in stock. So my next question is if the pc v bypasses the o2 sensor would a faulty o2 sensor still throw a code? Or was the other mechanic I spoke to mistaken?
one other tidbit of info that sways me on one of the debates around here. I spoke to one of our mechanics at my workplace about lean running engines. He says running an engine too lean will absolutely damage an engine. I guess a lot of the heat you're feeling is not only the lean combustion but also from undue friction because the piston chamber isn't getting properly lubricated. That's going to damage the piston heads, walls, gaskets, etc. He admitted he doesn't have a lot of experience with motorcycle engines but if the engine is backfiring consistently and the spark plugs look bad those are signs of an engine running too lean. If this is true of liquid cooled engines it has to be much worse for air cooled!
My dealer says they are talking to hd about how the new 103s are running from harley. They encourage anyone with issues from their 103s to call harley directly. The number is 414-343-4056. They say that typically customers get a much better response than the dealers do.
The flipside. My check engine light is on. Take it back and it turns out one of the o2 sensors is screwy! Yay, another trip to the dealer because they didn't have an o2 sensor in stock. So my next question is if the pc v bypasses the o2 sensor would a faulty o2 sensor still throw a code? Or was the other mechanic I spoke to mistaken?
one other tidbit of info that sways me on one of the debates around here. I spoke to one of our mechanics at my workplace about lean running engines. He says running an engine too lean will absolutely damage an engine. I guess a lot of the heat you're feeling is not only the lean combustion but also from undue friction because the piston chamber isn't getting properly lubricated. That's going to damage the piston heads, walls, gaskets, etc. He admitted he doesn't have a lot of experience with motorcycle engines but if the engine is backfiring consistently and the spark plugs look bad those are signs of an engine running too lean. If this is true of liquid cooled engines it has to be much worse for air cooled!
My dealer says they are talking to hd about how the new 103s are running from harley. They encourage anyone with issues from their 103s to call harley directly. The number is 414-343-4056. They say that typically customers get a much better response than the dealers do.
Club Member
Joined: Feb 2007
Posts: 2,404
Likes: 12
From: Haymarket, VA
I'm assuming you installed the Dynojet O2 sensor eliminators?
Had mine for 3 years, runs great, no problems whatsoever.
Had mine for 3 years, runs great, no problems whatsoever.
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Road Master
Joined: May 2009
Posts: 1,180
Likes: 3
From: utah
Ha ha! That part of my instructions didn't make it with the pc v. I kept asking myself, wtf are these guys talking about! Glad I looked up the instructions on line. Those aren't just some type of adapter.
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