Question About ECM
Banned
Joined: Sep 2009
Posts: 7,580
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From: The Internet (& Dyer, Indiana)
He had spent 200.00 getting it checked out and they told him it was the fuel pump, he takes it back home and puts fuel pump on and it stills just bearley idles. ck the pressure and it is around 45 ( we think it is suppost to be around 65).
sorry about not saying he had taken it in before
he is on fix income not much money, like most people trying to get by as little as possible.
Thanks all
sorry about not saying he had taken it in before
he is on fix income not much money, like most people trying to get by as little as possible.
Thanks all
"On the fuel rail there is a pressure regulator that limits the fuel pressure to 39-45 PSI and maintains a constant pressure."
http://www.nightrider.com/biketech/m...efi_basics.htm
The fuel line pin-hole thing is also worth exploring, it does happen often enough.
But if it were me, I'd do the ecm thing first, just to eliminate that from the picture.
If it were bad, (with no warranty), I'd be looking at one of the aftermarket self-tune jobbo's.
Last edited by Faast Ed; Nov 15, 2009 at 01:44 PM.
3rd Gear
Joined: Oct 2009
Posts: 7
Likes: 0
From: Oregon
You can test the output of the ECM to see if it's signal is within spec. Its reference output to the sensors is 5VDC. Check it at the TPS for starters. If it's less start checking the circuit backwards looking for the point of voltage drop. If you own a tester already it's a freebie for your buddy.
Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
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From: Leander Texas
Hi All, a friend of mine , his bike won't run right just bearley idles, and throws no codes , he wants to put my computer in his bike to see if it will run, will it hert my computer or would it be ok, for him to try it the bikes are both 06, his is a custom softail and mine is a deluxe.
Thanks for all the help
Bob
Thanks for all the help
Bob
May our Moderator Rest in Peace
Joined: Sep 2006
Posts: 11,386
Likes: 35
From: Rochester, NY
Just because the bike is only 3 or 4 years old I wouldn't discount the idea that one or both of the injectors might be at least partially clogged up with some kind of gunk or dirt.
The tiny holes in an injector can get clogged up fairly easily from dirt and or bad fuel. It can also happen when the bike is allowed to sit too long (long cold winter?) without some kind of stabilizer being added to the fuel.
The tiny holes in an injector can get clogged up fairly easily from dirt and or bad fuel. It can also happen when the bike is allowed to sit too long (long cold winter?) without some kind of stabilizer being added to the fuel.
Banned
Joined: Sep 2009
Posts: 7,580
Likes: 7
From: The Internet (& Dyer, Indiana)
Yes. It says so on the can at least.
But it is also great for cleaning carbon and other deposits. Can't hurt to spray it in your spark plug holes before storage. Makes that carbon nice and soft in the spring time. (They have a spray version and a liquid version)
Few oz's in your gas tank every third tankful will keep your injectors clean.
Once per year I fog my motor with it. I spray it into the intake til I just about choke the motor out, then shoot a lil in the spark plug holes.
After a half hour or so I will run the motor and spray a fine mist of water down the throttle body while the motor is running..
The theory behind it is the Seafoam softens the carbon, then the water mist acts like a sandblaster on the softened carbon.
Many do the water mist alone to clean carbon (with success). It has to be a fine mist, like from a windex bottle.
Warning: Have good ventilation when you start your bike, because the Seafaom will smoke up the area. (Bigtime). LOL
But it is also great for cleaning carbon and other deposits. Can't hurt to spray it in your spark plug holes before storage. Makes that carbon nice and soft in the spring time. (They have a spray version and a liquid version)
Few oz's in your gas tank every third tankful will keep your injectors clean.
Once per year I fog my motor with it. I spray it into the intake til I just about choke the motor out, then shoot a lil in the spark plug holes.
After a half hour or so I will run the motor and spray a fine mist of water down the throttle body while the motor is running..
The theory behind it is the Seafoam softens the carbon, then the water mist acts like a sandblaster on the softened carbon.
Many do the water mist alone to clean carbon (with success). It has to be a fine mist, like from a windex bottle.
Warning: Have good ventilation when you start your bike, because the Seafaom will smoke up the area. (Bigtime). LOL
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Stellar HDF Member
Joined: Sep 2009
Posts: 2,113
Likes: 666
Fuel Pressure
The old Magneti Marelli EFI on the baggers from 1996-2001 used 46-8 lbs fuel pressure. http://www.nightrider.com/biketech/m...efi_basics.htm (Magneti Marelli EFI not Delphi)
All Delphi systems use 60-2 lbs.
So-o-o-o, if you only have 47lbs the AFR will be/should be excessively lean.
Again, it sounds like you need to take a look inside your fuel tank and not think replacing the ECM will fix the low fuel pressure as it is controlled by a mechanical regulator.
Plugged fuel filter and hole(s) in the internal pressure lines will be the cause(s).
Not trying to start anything but we see this problem frequently and have yet to fix low fuel pressure with a new/different ECM.
Hope you find the problem without getting too far into the wallet,
Bob
All Delphi systems use 60-2 lbs.
So-o-o-o, if you only have 47lbs the AFR will be/should be excessively lean.
Again, it sounds like you need to take a look inside your fuel tank and not think replacing the ECM will fix the low fuel pressure as it is controlled by a mechanical regulator.
Plugged fuel filter and hole(s) in the internal pressure lines will be the cause(s).
Not trying to start anything but we see this problem frequently and have yet to fix low fuel pressure with a new/different ECM.
Hope you find the problem without getting too far into the wallet,
Bob
Last edited by FLTRI17; Nov 16, 2009 at 05:56 PM. Reason: Added link to MM EFI
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Ignition/Tuner/ECM/Fuel Injection
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May 13, 2006 09:54 PM