petrol turbo awd surging. no cel
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From: renmark
petrol turbo awd surging. no cel
2010 2.3 petrol awd, if i slowly squeeze the accelerator its ok, BUT if i am bit more aggressive on the accelerator , it starts surging.
no engine light , but i still put a launch X431 scan tool on it and NO errors. any ideas as to whats wrong ?
video :
no engine light , but i still put a launch X431 scan tool on it and NO errors. any ideas as to whats wrong ?
video :
Last edited by turbo1600; Jul 21, 2024 at 05:28 AM.
Senior Member
Joined: Oct 2018
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From: Northern California
well not a lot of information on your response.... so maybe its time to do a smoke test for intake leaks?????????
BTW there is more information inside your ECU/PCU then just looking for a DTC? So do more exploring you will find something to help solve your problem. Or go pay a shop with professional grade scanners and the knowledge how to use them. Might save a lot of guessing and replacing parts that are not the problem?
BTW there is more information inside your ECU/PCU then just looking for a DTC? So do more exploring you will find something to help solve your problem. Or go pay a shop with professional grade scanners and the knowledge how to use them. Might save a lot of guessing and replacing parts that are not the problem?
Thread Starter
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Junior Member
Joined: Jun 2024
Posts: 8
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From: renmark
well not a lot of information on your response.... so maybe its time to do a smoke test for intake leaks?????????
BTW there is more information inside your ECU/PCU then just looking for a DTC? So do more exploring you will find something to help solve your problem. Or go pay a shop with professional grade scanners and the knowledge how to use them. Might save a lot of guessing and replacing parts that are not the problem?
BTW there is more information inside your ECU/PCU then just looking for a DTC? So do more exploring you will find something to help solve your problem. Or go pay a shop with professional grade scanners and the knowledge how to use them. Might save a lot of guessing and replacing parts that are not the problem?
Senior Member
Joined: Oct 2018
Posts: 10,664
Likes: 233
From: Northern California
There is nothing in your posting that indicting looking at all the areas of the ECU. There is more then Check for Engine codes…
And no some intake leach may create an anomalous sensor input to the ECU which would not hard set a dash light that says check engine. If any anomalous condition is occurring the basic engine cycle may simply either clear a pending or reset the the DTC. This can be found by looking at more then just “current DTC, if you know how and have a scanning tool capable of accessing the other areas of the ECU.
And no some intake leach may create an anomalous sensor input to the ECU which would not hard set a dash light that says check engine. If any anomalous condition is occurring the basic engine cycle may simply either clear a pending or reset the the DTC. This can be found by looking at more then just “current DTC, if you know how and have a scanning tool capable of accessing the other areas of the ECU.
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Junior Member
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From: renmark
There is nothing in your posting that indicting looking at all the areas of the ECU. There is more then Check for Engine codes…
And no some intake leach may create an anomalous sensor input to the ECU which would not hard set a dash light that says check engine. If any anomalous condition is occurring the basic engine cycle may simply either clear a pending or reset the the DTC. This can be found by looking at more then just “current DTC, if you know how and have a scanning tool capable of accessing the other areas of the ECU.
And no some intake leach may create an anomalous sensor input to the ECU which would not hard set a dash light that says check engine. If any anomalous condition is occurring the basic engine cycle may simply either clear a pending or reset the the DTC. This can be found by looking at more then just “current DTC, if you know how and have a scanning tool capable of accessing the other areas of the ECU.
in what situation would a bad sensor NOT set a cel ?
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Joined: Oct 2018
Posts: 10,664
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From: Northern California
I am not here to necessarily school on how to do a diagnostic evaluation... but one example if a sensor(s) has not completely failed, poor continuity or damaged harness or connector, can give intermitted signal to the ECU which interprets it as a pending/permanent DTC and will rest the DTC every engine cycle or so. I to would then only show in a specific even counter.
The other thing is I am sure you load tested your battery before you started all your diagnostic work to ensure the battery is in good health and not bad ,failing or below specification?
ASE
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From: renmark
Using large letters does not get points with me helping you...
I am not here to necessarily school on how to do a diagnostic evaluation... but one example if a sensor(s) has not completely failed, poor continuity or damaged harness or connector, can give intermitted signal to the ECU which interprets it as a pending/permanent DTC and will rest the DTC every engine cycle or so. I to would then only show in a specific even counter.
The other thing is I am sure you load tested your battery before you started all your diagnostic work to ensure the battery is in good health and not bad ,failing or below specification?
ASE
I am not here to necessarily school on how to do a diagnostic evaluation... but one example if a sensor(s) has not completely failed, poor continuity or damaged harness or connector, can give intermitted signal to the ECU which interprets it as a pending/permanent DTC and will rest the DTC every engine cycle or so. I to would then only show in a specific even counter.
The other thing is I am sure you load tested your battery before you started all your diagnostic work to ensure the battery is in good health and not bad ,failing or below specification?
ASE
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