Peugeot 206 1.4 Auto idling issue?

[DIYheadache]

Could I just check something that looks a bit of a bodge job with you all?

The vacuum hose (plastic) from the manifold to the brake cylinder has a short piece of braded hose over the end connector (at the brake cylinder end) held on by two jubilee clips. Should this be here? Could it indicate that under the hose is a leak that someone has attempted to bodge this in the past?

Millerman - big favour - could you check your wifes, for reference?

Thanks

 

[Burnerman]

Thats a fairly common method of joining two semi rigid pipes together, and it appears on many cars.
Doesn't mean that its not leaking though!
John

 

[DIYheadache]

Thanks John.

Just did a quick check on ebay and found a replacement vacuum hose, which has push connections at both ends. So it shouldn't need the hose and clips?

Untitled

• DIYheadache
• 26 Sep 2010
• 1

Thoughts?

 

[Burnerman]

So long as it can plug into the servo, then there's no problem with that.
Originally these pipes had the flexible coupling to accommodate vibration from the engine.
Of course, you could try wrapping the existing pipe tightly with tape, to see if that changes things? Only personally speaking, I've never had to replace one of these due to perishing.
You don't think there could be a slight leak through the brake servo, do you?
A test for this is: Engine off, pump the brake pedal a few times until the pedal goes hard, and rises to the top - keep the pedal pressed and start the engine. The pedal should fall to its usual position.
John

 

[DIYheadache]

Tested the brake servo, no problems there. But the pedal doesn't go right to the top, more like halfway?

Slight blow on the exhaust, around the backbox, but I think I already mentioned this. Thought it seem to be more noticeable.

I wish the fault wasn't so Intermittent, it makes it so difficult to find.

Thanks

 

[DIYheadache]

Just had a thought.

Could one or more of the injectors be blocked/dirty?

It's only done 38K, but this had been 95% city traffic. The fuel filter has never been changed either.

Checked MOT history. The last owner did just 1K miles a year! Last MOT failed on emissions/lambda reading, with a large leak in the exhaust(mid-section). The exhaust was replaced and then the car passed MOT.

Does this mean the lambda sensor is OK?

Thanks

Peter

 

[millerman]

Millerman - big favour - could you check your wifes, for reference?

Thanks

Just had a look fella and its the same as yours, braided hose with 2 jubilee clips.
If O2 sensor is faulty it will show when the fault codes were read. Usually accompanied by a sooty exhaust and increased mpg.
Re the injectors and plugs, i think the car needs a good thrash for a good few miles on a M-Way.

 

[DIYheadache]

Thanks Millerman. I asked a neighbour of ours who has a Y reg manual and found the same setup too. She hasn't had many problems with hers though

The MPG is rubbish at the moment (26 MPG) but thats down to it being in and out of the garage.

I changed the plugs and air filter just before going to the garage first time. Plugs we're normal but air filter was worse than the one in our vacuum cleaner!!!

Have booked the car back into Peugeot for Thursday. They said to go for a 15 minute drive before coming, make sure the engine is warmed up. Garage is just round the corner so will be making quite a large detour around town in rush hour traffic before arriving. When we arrive the technician will come out in the car with us to observe the problem.

I forgot to ask, but will the technician be sitting there with a laptop looking at live data from the ECU while out on the test drive? Hopefully the car will play up and he can see exactly what is going wrong with the car?

Is it worth asking Peugeot to replace the fuel filter and clean the injectors?

Thanks

Peter

 

[DIYheadache]

Well, the car is still in the garage. I've been ringing them every other day and they seem to be getting nowhere. Last time I rung, they said they had taken the inlet manifold off and checked all seals for leaks.

I've been reading a bit on other forums and found a few that needed a new lambda sensor, so I asked how much it would cost to get this replaced.

£305!!!!!!!!!!!!!!! What the ****. The sensor on it's own was £190!! I laughed and said I could get the part for £60 and it couldn't take longer than 20 mins to replace as it's right at the front of the engine!! Technician was not in today so he's phoning on Monday to update me.

Not sure what to do?

 

[Mursal]

Hi,
At the beginning of the thread you mentioned that it revs up and down when you have your foot on the brake in park or reverse. What happens in park if you lift your foot off the brake, is there any change in engine behavior?

If its ok with your foot off the brake, then. The engine control unit (ECU) looks at the brake light switch to see if the brakes are applied. You may have a faulty brake light switch? Or a faulty ECU switch on the brake pedal?
It may not have a fault code on the 206 and may have been overlooked.
Common fault on the older VW diesel models. Lambda sensor, not sure about that one!

 

[DIYheadache]

It's happened while in park with foot off the brake too. This usually happens when the engine has been restarted after a short break in journey. I've noticed that the engine temperature goes up when it has been turned off after a longish journey, is this heat soak? This is usually when the problem happens. The idling returns to normal once you have a little air going through the radiator and the engine cools down a bit.

p.s. - I have never heard the radiator fans switch on, I think. At what temperature should these be switched on?

Thanks

Peter.

 

[Mursal]

Yes the electric fan should switch on if you leave the car running and not going anywhere, like as if you were in traffic.

An easy solution would be to hard wire the fan on continuously and see if your problem goes away.

When you say hot, do you mean into the RED. Does it ever overheat while in traffic? This would indicate fan trouble.
Obviously the problem is not in it all the time, is there anything else that changes when you have the problem?

 

[^neo^]

After 3 pages, i can't believe the ECT sensor hasn't been mentioned yet!

 

[Mursal]

Good point, could be faulty and still within limits therefore no fault codes.
ECT = engine coolant temperature sensor

 

[DIYheadache]

No, it never goes in to the red, usually about 95ish?

The car has A/C, so shouldn't the fans come on when this is turned on?

ECT - Is this next to the coolant hose going to the top of the radiator? Has blue connector with 3-pins? I assume it's a voltage divider with a thermistor. Which pin is the output, pin 2?

Why would a faulty ECT cause an erratic idle?

Thanks

Peter