Hi
Would appreciate any advice on why the motor should completely cut out
when changing down from 3rd to 2nd gear. It only happens intermitently
making it extremely difficult to trace and never at a garage where it
could be checked. There are no warning lights at all - its like the key
has been turned off. It usually restarts sometimes partially,but after the
3rd attempt it runs OK. Occasionally after a brief stop we have problems
restarting the motor again it starts and then stops after a couple of revs
- are the two problems linked??
We're in danger of being rammed from behind by someone who doesn't know we've 'stalled'.
As usual the garages with their computers have found nothing!!
Love the car but at times feel a horse and cart would be more reliable.
Help would be appreciated
FrenchPaul
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You need an auto electrician?
Crankshaft sensor?
Immobiliser?
Coil pack?
Fuel pump?
Any of the above could be faulty.
Has the garage read the fault codes?
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Fault codes show nothjng!
Garage recommend changing piece by piece until it goes away! Imagine how long and how much that could cost!!
It must be something specific - It only happens when changing from 3rd to 2nd - no other time!! The faults you list would occur all the time or when making other gear changes.
Its just like the engine has been turned off with the key - but the key is still in position 'on'.
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?It only happens when changing from 3rd to 2nd - no other time!! The faults you list would occur all the time or when making other gear changes?.
Not necessarily.
What?s specific about this gear change? The car (ECU) is unlikely to know which gear it?s in so unless it?s some chafing wire on the gear linkage, or some other sort of electrical ?happening? related to this specific mechanical action, then it?s something related to what the engine is being asked to do during this gear change.
Given that it?s from 3rd to 2nd, is this a gear change when slowing down, or when selecting the lower gear to zip past a slow vehicle?
I assume this is a petrol?
If it?s when the vehicle is decelerating, you have probably taken your foot off the accelerator, used engine braking, then de-coupled the drive, so there is no load on the engine. When the change is made you are pressing the accelerator again and asking the engine to pick-up from low revs. That brings in many possible faulty components to the equation, un-related to the specific gear the car is in, so you are looking at emission valves, sensors, manifold pipes etc. these could also be the cause of your re-starting problem. You are probably right, if it were common ignition components, the fault would be likely to show up at other times of driving.
You?re going to have to get more clues by thinking carefully about what leads up to this event. It?s surprising that there are no fault codes logged. This in itself may be a clue to those with knowledge of the ECU setup on these. Is your garage a Citroen agent? We have read on this forum before that general code readers do not always collect the fault codes a dealer might see with the dedicated PSA tester.
The above is only ?thinking out loud? about the fault. I don?t repair cars for a living, simply applying my fault finding experience to your problem.
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hi
my brother is a main citroen dealer mechanic he has said of some of the electrical problems he has to face on a daily basis with so many ecu"s doing so many different things..i will ask him what his advice would be.....
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Its the 2.0 HDi model - Ie diesel. Didn't show as the title is too long!
Yes, it was my local garage - didn't appreciate there would be a difference in error code readers. Citroen services are exhorbitant even here in France!
It is always on decelerating, either in traffic or on turning. It cuts as you change out of 3rd, by the time you engage 2nd and press the accelerator the motor is dead!! Ie in less than a second! It can happen once, or 2 or 3 times on a journey - we try to 'drive' round the problem - then it will go away for a week or more.
Dodgy electrical connection or partially broken wire seem logical to me, but where and why on the 3 to 2 change only?
Thankyou all - please keep trying
French Paul
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Engine movement on changing down is flexing the cable harness somewhere and cutting the engine out, if you dip the clutch does it pick up again. Regards Peter
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No - It wont restart without turning the key! Sometimes it will restart roughly then stop after a couple of revs. Surely other gear change downs would equally flex the harness! Its ONLY 3 to 2 that it happens.
keep thinking!
Thanks
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With ref to original post; are you saying that the engine cuts out when the clutch pedal is down and you can restart the engine by letting the clutch up in gear, or are you saying the then engines stops completely without even the ignition and oil pressure light coming on and won't restsart by letting the clutch up? If it's the latter surely that means the battery is disconnecting somehow.
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It wont restart by letting the clutch up. No warning lights, nothing! Turning the key is the only way to restart plus see post above! Checked battery cables and earth points etc all appear good - also still doesn't explain why its the 3 to 2 change only! My view is it has to be something specific that happens ONLY at this change and the whole car turns off!
Thanks
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Suspect too many keys on the keyring and a faulty ignition switch. the deceleration is swinging the Key and pulling the barrel and it plain cuts out. Regards Peter
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Sorry! No keys on the ring, no ring! Just the key and the door button fob.
Its been fine since monday - but I doubt its gone away for good!
Thanks again.
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try cleaning the egr valve
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Thanks for the thought. Again surely the EGR would affect other gear shifts as well and general performance.
For me its electrical, intermitent fault. My suspicion falls on the accelerator servos. Anybody had any problems? Know how to get to them? Reason - 2 or 3 pushes on the go button( with the motor switched off) and the problem seem to vanish for a day or often more.
Cheers
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I've got exactly the same problem. Please let me know if you managed to locate the fault. Many thanks
john
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