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Will not start 6 years 6 months ago #20005

  • Big Daddy
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Hi there. So I am giving this one last try. I do not have any special testing equipment however this is what is going on. i was thinking i had a flooding issue as the bike will not start when cold. its almost like you have to get the engine warm to start it. I burnt up one starter already (Lesson learned) I am thinking now i am not getting fuel so i removed the tank and sprayed gass directly into the air intake. it will belch fire back out the injectors(still will not start). . Someone was telling me that these bikes have hydraulic lifters could it be the lifters do not have any oil pressure to open the valves? I am at a loss.

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Will not start 6 years 6 months ago #20006

  • Kawboy
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To answer your question, no hydraullic lifters.
I had to go back into your previous posts to find some history on your issue. Your bike is an 84 with DFI.

When you turn the key on does the fuel pump hum?
Have you tried pulling the injectors out of the throttle bodies and placing the injectors in a set of cups, then try to flip the bike over and witness the injectors spraying?

Have you done a compression check to see if you have bent valves? Backfiring is not good. If the cam drive chain was loose, you may have jumpped a tooth and the cams are out of time.

In a prevous post it was suggested that you have the injectors professionally cleaned and tested. Did you do that or what did you do?

It's almost impossible to flood a DFI unless the injectors are bleeding down after shutdown, If a DFI doesn't fire within a couple of turns of the crankshaft, there is something really wrong. Most DFI systems when you turn on the key will run up the fuel pump and pressurize the system then the pressure control valve opens and dumps excess pressure back to the tank. If the injectors are leaking, then the injectors will be spraying when the key is on and the engine is not being cranked. Sure sign of dirty injectors and underr this condition, flooding will occur.

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Will not start 6 years 6 months ago #20007

  • Big Daddy
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The fuel Pump comes on for sure.. i know I am getting fuel through the DFI because i can see it and smell it with the air box removed. I am going to do a compression test tonight and i will let you know. to be honest what i did was shove it in the shop and bought a VTX 1800. The Bike is too nice to just sit there so i am going to pull it out and try again. with the gas tank off the return line will pump out gas into a cup. so i know the system is charging(unless all the gas is bypassing back to the tank??). I Am thinking if i spray gas down the air intakes there should be a response ? but there is none. I am thinking its compression (Head gasket ) funny thing is when it does decide to start its a freight train!! I am not a specialist in this sort of thing and NOBODY around my area would even consider working on it.

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