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[mystic2494]

Hey Guys has anyone run into this problem? I had a  local bike shop install new cams, quick start 585's I think. V&H true duals, python mufflers and a power commander 5.  They left the O2 sensors disconnected per dynojet tech. Now bike wont start!  Bike shop says they will change the cams and that should fix it.  I don't know what to think?  Bike is a 2010 CVO with a 110 engine. Any insight would be appreciated!

[Twolanerider]

Have they done the obvious and simplest thing first of trying to start the bike without the Power Commander in the loop?  And why in hell would they think changing cams would somehow help the bike start? 

Did they use adjustable pushrods?  If not are the pushrods in use too long?  If adjustables are they misadjusted?  Is everything (injectors, etc) electrically plugged back in?  If they had the tank off did they accidentally leave the fuel pump disconnected?  Did... well, you get it.  There are many simple mistakes or oversights worth looking in to before ripping the engine back apart.

[mystic2494]

yea they used adjustable pushrods and disconnected pcv. that's why im shaking my head.

[sadunbar]

yea they used adjustable pushrods and disconnected pcv. that's why im shaking my head.

As Twolane suggests - there's a long list of simple mistakes or simple oversight that can cause your bike to not start after work has been performed.  Check the simple things first - and there is absolutely no logic to replacing the cams to make your bike start.

The absolute basics - It takes compression, gas and spark to start the motor.  Check the compression (with the ACR's disabled).  If you have compression, you know the valves are fully closing.  If you are using "easy start" S&S cams, S&S can tell you how much compression you should expect to see on a gage.  Check your fuel connections.  Especially the connection of the fuel line to the gas tank.  It's not uncommon to have this connection not seat properly, which prevents fuel from reaching your injectors. One end of this fuel line connects to the gas tank and the other end of the fuel line connects to the fuel rail.  It's the connection to the gas tank that can be problematic.  Check for spark at the plugs.  And as Don suggests, make sure all the connections to the throttle body are properly plugged in and connected.  When you run a Power Commander without 02 sensors, you have to plug in "O2 sensor eliminators" into your O2 sensor wiring loom.  Can you verify O2 Eliminators have been installed into the sensor circuit?  I am sure you are going find a very simple explanation as to why your bike is not starting.  However, replacing cams should not even be on the list of things to troubleshoot...

Here is a link to O2 sensor eliminators...

http://www.power-commander-shop.com/090/Power-Commander-Accessoires-O2-Sensor-Eliminator.htm

good luck...

[mystic2494]

Thanks guys.   Ill let you know what happens. thanks for the link.  For the 2010 street glide pc said it didn't have eliminators.

[sadunbar]

Thanks guys.   Ill let you know what happens. thanks for the link.  For the 2010 street glide pc said it didn't have eliminators.

I'm under the impression anytime the O2 sensors are not utilized with the Power Commander, O2 eliminators must be used.  Perhaps one of the tuning guru's on the site knows for certain...

[grc]

Why would a supposedly knowledgeable shop install EZ-Start cams in a bike that already has compression releases? 

Jerry

[Steve Cole]

Have them disconnect the PC and then disconnect the ACR's. The late model HD engine will NOT start if there is not enough compression and the combination of the easy start cams and ACR's is most likely your problem. It's easy to check before you tear anything else apart.

[mystic2494]

Hey jerry, bike doesn't have CRV'S.  Thanks Steve I will call them this morning and see if they took it apart yet.   Yea the O2 eliminators that came in the box didn't fit CVO.  So they called PC and dynojet techs who told them to run the bike without the sensors connected. I don't know how that works. I would think the tuner and bike computer would be fighting eachother if the sensors aren't eliminated, unless its just running on the map from the PC.  Ive had a couple of street glides with PC tuners and they worked well with no problems. Guess Im going to school lol
Paul

[Steve Cole]

The bike will start and run with the stock ECM, while it may/will not be the proper tune it will still run. All CVO's that I know of in 2010 came with ACR's stock from the factory. So a simple compression test will let you see if you have enough to get the engine running. A HD big twin needs about 110 psi minimum. If they do not have that with the ACR's unhooked it's never going to run.

[sadunbar]

The bike will start and run with the stock ECM, while it may/will not be the proper tune it will still run. All CVO's that I know of in 2010 came with ACR's stock from the factory. So a simple compression test will let you see if you have enough to get the engine running. A HD big twin needs about 110 psi minimum. If they do not have that with the ACR's unhooked it's never going to run.

 

[grc]

Hey jerry, bike doesn't have CRV'S.  Thanks Steve I will call them this morning and see if they took it apart yet.   Yea the O2 eliminators that came in the box didn't fit CVO.  So they called PC and dynojet techs who told them to run the bike without the sensors connected. I don't know how that works. I would think the tuner and bike computer would be fighting eachother if the sensors aren't eliminated, unless its just running on the map from the PC.  Ive had a couple of street glides with PC tuners and they worked well with no problems. Guess Im going to school lol
Paul

ALL CVO110's came stock with automatic compression releases Paul.  So unless you removed yours, and you didn't mention doing so, then yes you should have ACR's.

Btw, the installation instructions from DynoJet for the PC-V indicate the O₂ sensor eliminators are only required on models prior to 2010 model year.  The instruction say for 2010 and later to just disconnect  the wires from the sensors, no eliminators (Optimizers in PC speak) are used.

Jerry

[mystic2494]

Jerry, where are the ACR'S?? Internal?? I had a custom that had CRV you pushed down when starting. Theres nothing like that on this bike.  I bought it used so maybe they were removed..  Thanks Jerry

[Jswerve]

Jerry, where are the ACR'S?? Internal?? I had a custom that had CRV you pushed down when starting. Theres nothing like that on this bike.  I bought it used so maybe they were removed..  Thanks Jerry

They are internal.

[grc]

Jerry, where are the ACR'S?? Internal?? I had a custom that had CRV you pushed down when starting. Theres nothing like that on this bike.  I bought it used so maybe they were removed..  Thanks Jerry

They are mounted where you can't see them easily with the rocker box and cover installed, and they are electrically operated by the ECM.  The kind you had on the custom were the manual style and were out where you could see and operate them.

Jerry