sputtering when excelerating
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Stage I
Joined: Jul 2011
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From: appling ga
sputtering when excelerating
I have an 04 Ultraclassic Electric Glide when it started sputtering and flashed a code for a map sensor, replaced the map sensor then flashed a misfire on front cylinder code, put new spark plugs in. Then still sputtered when excelerating and flashed no code, so replaced intake manifold gaskets it STILL sputters when excelerating and now it is back to flashing map sensor code again. Has anybody had this problem? I would appreciate any help with this issue.
Thanks
Thanks
Novice
Joined: Oct 2008
Posts: 16
Likes: 0
From: Ct.
sputtering
I'm having same symptoms with 2008 FXDSE2. exact same sputtering under acceleration and idle, and p0107 map sensor code. Don't know what to check after reading your post! Might start with unplugging pcv and see how it runs.
Good luck
Good luck
Road Warrior
Joined: Mar 2009
Posts: 1,843
Likes: 5
From: PacNW (Olympic Pennsula)
Have you check the Crank position sensor?
My was doing the same thing Spitting and sputtering wouldn't go,
Unplugged PC3
changed Plug wires
Replaced the fuel filter
turned out to be the CKP ($60.00 at Dealer)
2007 Picture
My was doing the same thing Spitting and sputtering wouldn't go,
Unplugged PC3
changed Plug wires
Replaced the fuel filter
turned out to be the CKP ($60.00 at Dealer)
2007 Picture
Novice
Joined: Oct 2008
Posts: 16
Likes: 0
From: Ct.
sputtering
Thanks for the response, I unplugged my pcv today with no good result.
It started good and idled ok while in cold mode but in about 30 seconds it started to miss and had eratic idle and even stalled. Can you check the crank sensor or just replace it?
It started good and idled ok while in cold mode but in about 30 seconds it started to miss and had eratic idle and even stalled. Can you check the crank sensor or just replace it?
Road Warrior
Joined: Mar 2009
Posts: 1,843
Likes: 5
From: PacNW (Olympic Pennsula)
I got this on the Net somewhere.
Crank sensors are a magnetic switch, same as a ABS sensor, difference is the crank sensor only trips at TDC. It is used by the ECU to calculate fuel timing and ignition timing based on TDC from the crank sensor.
They can go bad sure, and fuel,spark will not happen. You can somewhat check them by ohm'ing it and rotating the engine slowly. You should see it blip from a open/closed circuit to the opposite at TDC.
Also being magnet they can attract metal particles and cause problems, a simple removal and check/clean of CPS end can cure that. Though I have never experienced this others have noted.
the Sensor can also test good and still be bad.
Crank sensors are a magnetic switch, same as a ABS sensor, difference is the crank sensor only trips at TDC. It is used by the ECU to calculate fuel timing and ignition timing based on TDC from the crank sensor.
They can go bad sure, and fuel,spark will not happen. You can somewhat check them by ohm'ing it and rotating the engine slowly. You should see it blip from a open/closed circuit to the opposite at TDC.
Also being magnet they can attract metal particles and cause problems, a simple removal and check/clean of CPS end can cure that. Though I have never experienced this others have noted.
the Sensor can also test good and still be bad.
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From: El Cajon Ca.
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Advanced
Joined: May 2009
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OK i'm lost now. Changed the sensor still no good. Had the injectors flushed, new fuel plugs etc. no good. Did notice that one of the plugs (rear) was white so guess it must be fueling somewhere. No codes are coming up and it started out of nowhere. HELP!!! Any more tips guys?? 2007 XLC1200.
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Cruiser
Joined: Nov 2011
Posts: 138
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From: Small Country
Those intermittent problems are the toughest.
When a condition exist for very short amount of time it is not enough to set a Diagnostics Code. For the Ignition Control Module to set a code the fault condition must be present for several cycles in a row.
Also, a "MAP Code" or "CPS Code" does not necessarily mean that the corresponding sensors are bad, the failure could be in the wiring to the sensors (broken wires, chafed/pinched wires, corroded connectors, etc.)
If I have to make a guess on the sputtering and if you rule out the obvious (bad fuel, clogged injectors or fouled spark plugs)then the root cause is most likely in intermittent wire connections to Coil, Spark Plugs, Fuel Injectors, MAP or CPS.
Most vulnerable connections are the ones from chassis to the engine components, they are usually the ones that fail first since they are subjected to most vibration and relative motion. Also, at certain RPM those wires can get in natural resonance and this is when they'll start opening up if there is any wire fracture.
Ones that fail the most are connections to the Fuel Injectors. First they start as intermittent (manifest itself in misfire/ sputtering), then when the failure aggravates the ECU will be setting codes, then you get to "no start condition".
I hope this helps.
Good luck!
When a condition exist for very short amount of time it is not enough to set a Diagnostics Code. For the Ignition Control Module to set a code the fault condition must be present for several cycles in a row.
Also, a "MAP Code" or "CPS Code" does not necessarily mean that the corresponding sensors are bad, the failure could be in the wiring to the sensors (broken wires, chafed/pinched wires, corroded connectors, etc.)
If I have to make a guess on the sputtering and if you rule out the obvious (bad fuel, clogged injectors or fouled spark plugs)then the root cause is most likely in intermittent wire connections to Coil, Spark Plugs, Fuel Injectors, MAP or CPS.
Most vulnerable connections are the ones from chassis to the engine components, they are usually the ones that fail first since they are subjected to most vibration and relative motion. Also, at certain RPM those wires can get in natural resonance and this is when they'll start opening up if there is any wire fracture.
Ones that fail the most are connections to the Fuel Injectors. First they start as intermittent (manifest itself in misfire/ sputtering), then when the failure aggravates the ECU will be setting codes, then you get to "no start condition".
I hope this helps.
Good luck!
Advanced
Joined: May 2009
Posts: 55
Likes: 1
Those intermittent problems are the toughest.
When a condition exist for very short amount of time it is not enough to set a Diagnostics Code. For the Ignition Control Module to set a code the fault condition must be present for several cycles in a row.
Also, a "MAP Code" or "CPS Code" does not necessarily mean that the corresponding sensors are bad, the failure could be in the wiring to the sensors (broken wires, chafed/pinched wires, corroded connectors, etc.)
If I have to make a guess on the sputtering and if you rule out the obvious (bad fuel, clogged injectors or fouled spark plugs)then the root cause is most likely in intermittent wire connections to Coil, Spark Plugs, Fuel Injectors, MAP or CPS.
Most vulnerable connections are the ones from chassis to the engine components, they are usually the ones that fail first since they are subjected to most vibration and relative motion. Also, at certain RPM those wires can get in natural resonance and this is when they'll start opening up if there is any wire fracture.
Ones that fail the most are connections to the Fuel Injectors. First they start as intermittent (manifest itself in misfire/ sputtering), then when the failure aggravates the ECU will be setting codes, then you get to "no start condition".
I hope this helps.
Good luck!
When a condition exist for very short amount of time it is not enough to set a Diagnostics Code. For the Ignition Control Module to set a code the fault condition must be present for several cycles in a row.
Also, a "MAP Code" or "CPS Code" does not necessarily mean that the corresponding sensors are bad, the failure could be in the wiring to the sensors (broken wires, chafed/pinched wires, corroded connectors, etc.)
If I have to make a guess on the sputtering and if you rule out the obvious (bad fuel, clogged injectors or fouled spark plugs)then the root cause is most likely in intermittent wire connections to Coil, Spark Plugs, Fuel Injectors, MAP or CPS.
Most vulnerable connections are the ones from chassis to the engine components, they are usually the ones that fail first since they are subjected to most vibration and relative motion. Also, at certain RPM those wires can get in natural resonance and this is when they'll start opening up if there is any wire fracture.
Ones that fail the most are connections to the Fuel Injectors. First they start as intermittent (manifest itself in misfire/ sputtering), then when the failure aggravates the ECU will be setting codes, then you get to "no start condition".
I hope this helps.
Good luck!
I guess i have a weekend ahead of me chasing ghosts.
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