Slight spuddering at highways speeds with slight push of gas pedal, fine floored
01-20-2018, 01:34 PM
#1
Pro
Thread Starter
Slight spuddering at highways speeds with slight push of gas pedal, fine floored
2006 C4 997.1
I notice a "spudder" / hesitation with I have my foot on the gas slightly. Goes away when fully depressed. I dont seem to notice it until I am full speed on the highway.
Ideas ?
I had the spark plugs done 24 months ago.
I just got a new battery (last week)
I'm due for an oil change.
No codes ... and I dont have an OBD2 scanner.
Plugs are 2 years old (I thought it was 1). All of them were done.
Fuel pump ... has never been done I dont think.
I'm at 71,000 kms.
The spuddering might happen as well when making a hard right to get on the highway. But the spudder is brief.
Fuel pump ?
Watch for "black/blue puffs of smoke when it misfires (VERY noticeable on higher boost)"
inspect the plug wires where they connect to the plugs see if one or more of the wells have oil in them
See if Engine warms and it goes away.
See if one ignition coil end packed with white corrosion.
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https://rennlist.com/forums/997-turbo-forum/886843-sputtering-causes.html
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Mild "bucking" under mild acceleration
https://rennlist.com/forums/997-forum/877045-mild-bucking-under-mild-acceleration.html
I notice a "spudder" / hesitation with I have my foot on the gas slightly. Goes away when fully depressed. I dont seem to notice it until I am full speed on the highway.
Ideas ?
I had the spark plugs done 24 months ago.
I just got a new battery (last week)
I'm due for an oil change.
No codes ... and I dont have an OBD2 scanner.
Plugs are 2 years old (I thought it was 1). All of them were done.
Fuel pump ... has never been done I dont think.
I'm at 71,000 kms.
The spuddering might happen as well when making a hard right to get on the highway. But the spudder is brief.
Fuel pump ?
- the fuel filter could be clogged,
- or the fuel pump is failing
Watch for "black/blue puffs of smoke when it misfires (VERY noticeable on higher boost)"
inspect the plug wires where they connect to the plugs see if one or more of the wells have oil in them
See if Engine warms and it goes away.
See if one ignition coil end packed with white corrosion.
Similar threads
https://rennlist.com/forums/944-turb...m-mystery.html
https://rennlist.com/forums/928-foru...eleration.html
https://rennlist.com/forums/924-931-...eft-turns.html
https://rennlist.com/forums/997-turbo-forum/886843-sputtering-causes.html
https://rennlist.com/forums/997-foru...n-problem.html
Mild "bucking" under mild acceleration
https://rennlist.com/forums/997-forum/877045-mild-bucking-under-mild-acceleration.html
Last edited by 911searcher; 01-20-2018 at 03:52 PM.
01-20-2018, 01:55 PM
#3
Pro
Thread Starter
A list of things that can cause a hesitation / spuddering at low throttle
the exhaust and fuel system.
Leak in Exhaust Manifold
Worn Seals or Gaskets
Failing Catalytic Converter
Malfunctioning Oxygen Sensors
Dirty Fuel Injectors
Bad or Dirty Spark Plugs
Dirty Mass Airflow Sensor
Vacuum Leak
Buildup in Throttle Body:
This looks like a good resource:
https://www.yourmechanic.com/service...ing-inspection
the exhaust and fuel system.
Leak in Exhaust Manifold
Worn Seals or Gaskets
Failing Catalytic Converter
Malfunctioning Oxygen Sensors
Dirty Fuel Injectors
Bad or Dirty Spark Plugs
Dirty Mass Airflow Sensor
Vacuum Leak
Buildup in Throttle Body:
I'm thinking maybe you have some buildup inside the throttle body or maybe the drive by wire throttle position sensor has some wear at the light pedal position. Fastest and easiest thing to try first is to disconnect the battery for 10 minutes (don't latch the frunk!) which will cause the fuel trims and TPS sensor to recalibrate. Then when you restart it, go for a normal drive and see if it's any different. If not, pull the intake and clean the throttle body, especially where the throttle plate meets the body when closed.
https://www.yourmechanic.com/service...ing-inspection
Last edited by 911searcher; 01-21-2018 at 11:22 AM.
01-20-2018, 01:55 PM
#4
Rennlist Member
does it happen near 2700 rpm in any gear ?
01-20-2018, 01:58 PM
#7
This looks like a good resource:
https://www.yourmechanic.com/service...ing-inspection
the exhaust and fuel system.
Leak in Exhaust Manifold
Worn Seals or Gaskets
Failing Catalytic Converter
Malfunctioning Oxygen Sensors
Dirty Fuel Injectors
Bad or Dirty Spark Plugs
Dirty Mass Airflow Sensor
Vacuum Leak
https://www.yourmechanic.com/service...ing-inspection
the exhaust and fuel system.
Leak in Exhaust Manifold
Worn Seals or Gaskets
Failing Catalytic Converter
Malfunctioning Oxygen Sensors
Dirty Fuel Injectors
Bad or Dirty Spark Plugs
Dirty Mass Airflow Sensor
Vacuum Leak
Trending Topics
01-20-2018, 02:04 PM
#9
Pro
Thread Starter
Plugs are 2 years old (I thought it was 1). All of them were done.
Fuel pump ... has never been done I dont think.
I'm at 71,000 kms.
I thought it might go a way with a new tank of gas but it didnt.
I never drained the gas, before adding more.
Fuel pump ... has never been done I dont think.
I'm at 71,000 kms.
I thought it might go a way with a new tank of gas but it didnt.
I never drained the gas, before adding more.
01-20-2018, 02:13 PM
#11
Pro
Thread Starter
01-20-2018, 02:21 PM
#12
Pro
Thread Starter
I was experiencing this problem for months. Check my past posts on this. I have just replaced my positive and negative battery cables and the car seems to be running a night and day difference. I am awaiting a replacement hood latch to do a road test and confirm it is really fixed.
Clean up the battery cable terminal and the smaller ground there and tighten it down. I'm curious to see if this resolves your issue.
Clean up the battery cable terminal and the smaller ground there and tighten it down. I'm curious to see if this resolves your issue.
01-20-2018, 02:29 PM
#15
Pro
Thread Starter