Citroen C4

[chd923]

Hi, I recently bought a Citroen C4 1.6 petrol and I’m having a problem when slowing down at traffic lights, approaching a junction, roundabout or going around corners, the car’s engine cuts out, it’s usually when I drive it in the morning or when I haven’t driven it for a day or so, when the car has been running for a while I don’t seem to have any problem.

I’ve changed the spark plugs and throttle body has been done not really sure what else to do, does anybody have any advice?

Thanks

[GiveMeABreak]

Replacing parts on a whim is costly and won't necessarily fix the issue - as you've seen. You really need to get it on a Lexia and get a diagnostic done. If it's a sensor problem then there's a fuelling, air or sensor problem, then there should be a fault code.

If I were to mention these possibilities:- Engine fuse box, supermarket fuel, clogged fuel filter, crank sensor - you'll get the picture - it could be anything.

Get a diagnostic done first and put up any codes you get here, which may help the diagnosis.

[chd923]

Thanks for the reply.

The problem is it’s been plugged in and it hasn’t come up with any codes.

[Hell Razor5543]

Did you use a Diagbox system or a generic code reader? The generic systems don't work well on PSA vehicles (sometimes they don't work at all).

[chd923]

I’m not too sure to be honest, a mechanic done it, where would I take it to make sure they are using the correct system? Thanks

[Steve Walsh]

Any Citroen dealer should have the kit to do it but it all depends on the person operating it, There may be a member on here with the kit in your area that may help. There is a list somewhere but can't remember how to find it.
I am sure someone will be on soon with the info you need

Steve

[chd923]

Thank you Steve

[myglaren]

Lexia Locations.

[411514]

It sounds fuelling related rather than ignition or airflow. But there's no fuel filter, so it won't be that, and it won't be supermarket fuel. My best guesses would be dodgy in-tank fuel lift pump or blocked fuel tank breather vent. Is the problem better, worse or the same with a brimmed full tank of fuel?

[GiveMeABreak]

^ That 's not absolutely correct. It depends on which model of 1.6 he has. There are C4 Petrol models like the 1.6 THP and others that have a fuel filter - it's just not in the engine compartment, but usually visible just by the fuel gauge pump under the rear seat...

Item 3

@ chd923: pop your VIN up and I'll see exactly what engine you have.

As for supermarket fuels - at the end of the day you get what you pay for. If you run your car on the cheapest bog standard supermarket fuel - it will be comparable to non premium branded fuels and I mean like for like! This of course does not include premium fuels that cost more, like the Shell V-Power and Gulf Premium.

Although fuel may come from the same refineries whether destined for supermarkets or other forecourts, it's what goes into the branded fuels separately that makes the difference. These have additives, octane improvers and fuel cleaners added that can improve engine performance and help keep the injection system running smoothly. So depends on each individual's budget and preference.

Running some premium fuels can negate the need for using expensive injection system cleaners periodically, as the cleaners are already included in many the premium branded fuels.

[411514]

As for supermarket fuels - at the end of the day you get what you pay for. If you run your car on the cheapest bog standard supermarket fuel - it will be comparable to non premium branded fuels and I mean like for like! This of course does not include premium fuels that cost more, like the Shell V-Power and Gulf Premium.

Although fuel may come from the same refineries whether destined for supermarkets or other forecourts, it's what goes into the branded fuels separately that makes the difference. These have additives, octane improvers and fuel cleaners added that can improve engine performance and help keep the injection system running smoothly. So depends on each individual's budget and preference.

Running some premium fuels can negate the need for using expensive injection system cleaners periodically, as the cleaners are already included in many the premium branded fuels.

I believe the same thing about Bifidius Digestivum in yoghurt.

[chd923]

It sounds fuelling related rather than ignition or airflow. But there's no fuel filter, so it won't be that, and it won't be supermarket fuel. My best guesses would be dodgy in-tank fuel lift pump or blocked fuel tank breather vent. Is the problem better, worse or the same with a brimmed full tank of fuel?

It makes no difference if the fuel is running low or the tank is full, only difference is it seems to be a lot better when the cars got going a bit