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Topic # 239826 6-Aug-2018 19:11
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We have a low mileage (50k) 308 2008 5 door with a 1.6L Auto petrol engine. Have been having issues on a cold start where the engine misses on starting and then will get “stuck in 1st”. Removing your foot from the accelerator and then “pumping it a bit” resolves the issue, but this might last 10 seconds.

The second issue is the fan going to high speed for up to 2 minutes after switching the car off - not clear about a pattern for this.

Has had four visits two to a local garage - who spent a day the second time and didnt charge (first day replaced sparks) then two to the dealer who the first time - changed the coolant (which I had already done) and then changed the battery (it “failed the test”) and replaced the outlet tank. Took it back today and they suggested we should “change the oil” (done in Feb max 5000k ago) and add a “fuel cleaner”. They have done an ecu upgrade but generally haven’t been much help?

Any thoughts?


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  Reply # 2069044 7-Aug-2018 00:02
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Maybe search on the net for a Peugeot forum, join up and ask the experts there? Maybe search on Youtube?


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  Reply # 2069045 7-Aug-2018 00:07
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A visit to the proper Peugeot dealer for diagnostics and repair?






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  Reply # 2069053 7-Aug-2018 02:40
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All classic symptoms of a failed coolant temperature sensor.

Mechanic should be able to compare the actual coolant temp with the reading as reported by the ECU. The reading is probably out by 20 deg or so. Enough to cause problems, but not enough to set a failed sensor trouble code.

edit to add

Assuming that the coolant temp sensor has been tested, check for head gasket leaks, as they can cause a misfire at idle and cold starts.

Check the Airflow meter if the car has one.

When the engine is warmed up, check the fueltrim values. If the ECU is making a large correction, there is another problem somewhere.

Check for things like vacuum leaks, split air inlet hoses etc.





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  Reply # 2069054 7-Aug-2018 02:55
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Are you using Gull petrol or another petrol that contains ethanol? As such ethanol petrol blends have a different air / fuel ratio. Which can play havoc with some cars.





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  Reply # 2069085 7-Aug-2018 08:08
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Time to bite the bullet and go to a proper Peugeot dealer garage.  





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  Reply # 2069088 7-Aug-2018 08:15
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amiga500:

Maybe search on the net for a Peugeot forum, join up and ask the experts there? Maybe search on Youtube?



Tried that, there aren’t any great/specific answers



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  Reply # 2069089 7-Aug-2018 08:15
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Geektastic:

A visit to the proper Peugeot dealer for diagnostics and repair?



That is who has had it the last two times...



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  Reply # 2069090 7-Aug-2018 08:18
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Aredwood: All classic symptoms of a failed coolant temperature sensor.

Mechanic should be able to compare the actual coolant temp with the reading as reported by the ECU. The reading is probably out by 20 deg or so. Enough to cause problems, but not enough to set a failed sensor trouble code.

edit to add

Assuming that the coolant temp sensor has been tested, check for head gasket leaks, as they can cause a misfire at idle and cold starts.

Check the Airflow meter if the car has one.

When the engine is warmed up, check the fueltrim values. If the ECU is making a large correction, there is another problem somewhere.

Check for things like vacuum leaks, split air inlet hoses etc.


That was my thinking too, the dealer replaced the outlet tank (including the thermostat) the first time.

There was some thought that the fuel might be an issue - runs 95 - we fill it at the “supermarket” options due to convenience. Might run an injector cleaner with a full tank from a big brand?


Jon

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  Reply # 2069531 7-Aug-2018 20:23
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jonherries:
Aredwood: All classic symptoms of a failed coolant temperature sensor.

Mechanic should be able to compare the actual coolant temp with the reading as reported by the ECU. The reading is probably out by 20 deg or so. Enough to cause problems, but not enough to set a failed sensor trouble code.

edit to add

Assuming that the coolant temp sensor has been tested, check for head gasket leaks, as they can cause a misfire at idle and cold starts.

Check the Airflow meter if the car has one.

When the engine is warmed up, check the fueltrim values. If the ECU is making a large correction, there is another problem somewhere.

Check for things like vacuum leaks, split air inlet hoses etc.


That was my thinking too, the dealer replaced the outlet tank (including the thermostat) the first time.

There was some thought that the fuel might be an issue - runs 95 - we fill it at the “supermarket” options due to convenience. Might run an injector cleaner with a full tank from a big brand?


Jon


Is the temp sensor part of the outlet tank on your car? As on lots of cars, the coolant temperature sensor is completely separate to the thermostat.







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  Reply # 2069536 7-Aug-2018 21:03
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Interesting - you might be right on that, will have a look at the temp sensor this weekend.

Jon

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