various questions on my new to me 05 SEEG
1. The idle at start up has just dropped down to around 7-800 and the bike will not stay running without some throttle increase. The RPMs seemed to level out at 1000 once the bike is warmed up. Starting also requires a twist of the throttle. It didn't do this at first. I changed the plugs and cleaned the air filter which didn't make a difference. Any thoughts?
2. If I change to hydraulic tensioners is there any reason to change anything else (cams or bearings) if I'm happy with how the bike runs now?
3. The bike came with a SERT. Is that still a good program? Is that something I can utilize on my own? The bike was just dynoed at 103 hp and averages 32mpg on the interstate and 35mpg at 55mph. I like the power but would like better mpg.
4. The changes on the bike that I know about are rhinehart duals and a K&N air filter. The check engine light comes on with codes 134 & 154 saying the o2 sensers are open or not responding. The rhinehart's do not have o2 sensers. Arn't o2 sensers nessasary for optimum performance with EFI?
This forum is a great tool for a newbie. I've already picked up a lot of great info and funny stuff, too. We've got a limited time for riding here in Iowa and I'm making the most of it. Thanks in advance.
4. The changes on the bike that I know about are rhinehart duals and a K&N air filter. The check engine light comes on with codes 134 & 154 saying the o2 sensers are open or not responding. The rhinehart's do not have o2 sensers. Arn't o2 sensers nessasary for optimum performance with EFI?
Also, the idle somehow got better on its own. It got worse first and the bike would kill if I let it come to idle at stops. I kept having to goose the throttle. I took the air cleaner off to look at the pintle in the IAC, put it back together without changing anything, and the next morning it was working fine and continues to do so. Go figure.
When I bought it 4 years ago, it had Rip Saw drag pipes on it and it got 42 mpg.
A couple of years later I switched to a 2 into 1, Fat Cat exhaust and it still gets 42 mpg. Your windshield might cost you a few miles per gallon, because of wind drag.
The Fat Boy, being a Softail, comes with the balanced engine, which I think would get a bit less fuel mileage then your engine.
My guess is you should be getting at least 45 mpg doing a steady 55.
Tom
Last edited by tmitchellof PG; Oct 13, 2010 at 10:46 PM.
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Also, the idle somehow got better on its own. It got worse first and the bike would kill if I let it come to idle at stops. I kept having to goose the throttle. I took the air cleaner off to look at the pintle in the IAC, put it back together without changing anything, and the next morning it was working fine and continues to do so. Go figure.
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I was told that mine was stock except for the Stage 1 download, SE breather, and SE slip ons. It runs very well, and is very strong. I doubt it will ever see a dyno but it is much stouter than the '07 FLHTC I had previously (TC96).
Can't really help with the hard starting and low idle, sounds almost like you may have an air leak at the intake manifold? You can spray starting fluid on the manifold where it joins the heads and fuel injection, with the engine running. If there is a difference in rpm when you hit it with the starting fluid that is an indication of an air leak.
Your bike did not have O2 sensors from the factory, they came along in '07 ('06 on Dynas).
If you change to hydraulic tensioners, you will have to change cams, at least with the Andrews kit. Not sure about the HD kit, but I would not use it as it does not change the inner chain to a roller type chain like the newer bikes have.
You might also want to visit the CVO forum.www.cvoharley.com






