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750 ie running/starting issue

Started by StrifeX, April 20, 2013, 06:27:20 AM

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StrifeX

April 20, 2013, 06:27:20 AM Last Edit: April 20, 2013, 07:27:37 AM by StrifeX
Hello everyone. I've run into a problem and I hope someone might be able to help me out. I recently purchased a pretty worn 2002 monster 750s ie. It ran but was beat up. I changed brakes, tires and rode it for a while. I then noticed a click in the throttle. When this click happened, the bike would either feel like it lost power or like it got it back. So I tried to find a fix. I read a lot about the fuel filter, so I opened the tank and cleaned it out the best I could (It was pretty terrible). I replaced the fuel filter with one from nappa.

After reassembling everything, the bike now wont stay on. After messing with the spark plugs, I took apart the tank again and made sure fuel was pumped into the filter, out of the filter, and out of the tank (it only pumped out of one hole, which I thought was strange) I reassembled once more, and this time the bike stayed on longer (about 10 sec) but it still wont stay on, and if I touch the throttle at all, the bike dies.

Also, after I start it then it dies, I check the plugs. The lower one usually has black residue (often wet) and the upper had some dry residue, but the upper one is usually not that bad. After I clean them, it will start for a few seconds again and die. Any help would be greatly appreciated. Thanks.

ducpainter

#1
April 20, 2013, 07:06:46 AM
What did you use to clean out the tank?

I'd try a new set of plugs.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


DarkMonster620

#2
April 20, 2013, 08:01:51 AM
how did the hoses inside the tank looked? also +2 on new plugs

do you have a diagnostic tool? can get a friend who has one? why, check TPS angle and mV settings . . .
Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 08:34:34 AMDucati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."

StrifeX

#3
April 20, 2013, 03:15:00 PM Last Edit: April 20, 2013, 03:44:04 PM by StrifeX
I have already changed the plugs a second time. The hoses in the tank were fine, and I dont have access to a diagnostic tool. Maybe the injectors are dirty? I turned the bike with the air box open and felt puffs of air coming up. I also changed the battery.

update: It will sometimes start better now if I mess with the throttle. Still stays on for a maximum of maybe 10 secs, idle drops and dies.

ducpainter

#4
April 20, 2013, 03:46:49 PM
Did you install the filter with the arrow pointing in the direction of flow?

You said you cleaned out the tank. How?

Did you check the screen on the pump for blockage?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


StrifeX

#5
April 20, 2013, 04:30:22 PM
The nappa filter has an "in" side marked. The line coming from the pump in going in that side. I just emptied the tank, scrubbed what I could (there was a rag in there!), took out all the parts an cleaned them (filter, pump). I got the bike to stay on for about 5 minutes now, but it runs terribly. And if I use the throttle, it bogs down. After a few runs, I took the plugs out and they were both very black and dry.

StrifeX

#6
April 21, 2013, 02:12:32 AM
Now its back to not starting at all again. Please Help.

StrifeX

#7
April 21, 2013, 04:45:27 AM
This post (http://www.ducatimonsterforum.org/index.php?topic=12274.0) says that when you turn the key you hear the pump, and once its pressurized I shouldn't hear it anymore, but I hear it every time I turn the key and when I'm pushing the ignition button. Clue?

ducpainter

#8
April 21, 2013, 06:05:26 AM
Quote from: StrifeX on April 21, 2013, 04:45:27 AM
This post (http://www.ducatimonsterforum.org/index.php?topic=12274.0) says that when you turn the key you hear the pump, and once its pressurized I shouldn't hear it anymore, but I hear it every time I turn the key and when I'm pushing the ignition button. Clue?
If the pump doesn't reach pressure and turn off there is either a leak inside the tank, bad hose or connection, or the pressure regulator is faulty. I suppose a faulty pump is possible, but not likely.

The regulator is on the throttle bodies and connects to the fuel return back to the tank. You could try clamping off the return to see if the pump stops running
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


StrifeX

#9
April 22, 2013, 04:57:47 PM
Alright, I got her running again, but still very rough. As I drive, there are these click, which cause the bike bog. I can feel the click in the throttle and its like i hit the brake. Then power will come back. It can do this many times, sometime very violently. I wonder if it is timing. I still need to replace the belts and have the valves adjusted. Would these cause this issue? Thank you for all the help up to now.

ducpainter

#10
April 22, 2013, 05:04:59 PM
It sounds like it's backfiring through the intake.

That could be a very tight valve, or it could be a lean condition.

Does your pump shut off?

If it doesn't your issue could be low fuel pressure causing it to run lean, or not creating a good spray pattern through the injectors.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


DarkMonster620

#11
April 22, 2013, 05:16:25 PM
Check for the vacuum hose connecting to the fuel pressure regulator, it could be that when you create a "0" pressure environment, the regulator 'stops' working and then 'catches' up [am I making sense?], but, if these 'clicks' are present when idling, it could be a bad injector, is the only thing that I can think of that makes 'clickclickclickclickclickclick'[opening and closing of injector, noise]

Remember, these ideas were born in Spanish and translated to English as I write . . .

Now, if this all continues, you will have to have looked at by someone who can diagnose it with a diagnostic tool.
Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 08:34:34 AMDucati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."

ducpainter

#12
April 22, 2013, 05:21:14 PM
I don't think the Monster uses a vacuum line to the pressure regulator.

It just vents to atmosphere.

The system is pretty basic.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


DarkMonster620

#13
April 22, 2013, 05:22:39 PM
Quote from: ducpainter on April 22, 2013, 05:21:14 PM
I don't think the Monster uses a vacuum line to the pressure regulator.

It just vents to atmosphere.

The system is pretty basic.

not to threadjack, it's raining real hard, so, when it stops, I'll go look . . . just to be sure, automobile mechanics kicking it dp . .
Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 08:34:34 AMDucati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."

Howie

#14
April 23, 2013, 12:09:56 AM
Don't look.  Vented to atmosphere.
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