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J

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My 407 (2.0HDI 2005) isn't running all that well at times - it tends to hesitate on acceleration between 1500-1700rpm for a second, and then continues on as normal. This is normally after a gear change, then acceleration. The hesitation is only for a second, but I feel the car lurch and then go on, a bit like its being choked and then goes as normal. The problem has been around for the last few months, and although its been into Peugeot for service etc, they have found no fault as there are no error codes generated :(
Now I've been reading around, but I can only assume its something to do with the air intake in some how (numerous causes I believe). Can anyone give any way of testing if the following are working correctly:
- MAF sensor
- air manifold inlet temp
- MAP sensor (wherever it maybe?)
- EGR valve (again, wherever this is located?)
I'm not sure which of the above could be causing the symptons I'm experiencing, but its really starting to annoy me that its still there! I'm convinced that whatever it maybe is also causing more fuel to be used - average mpg is only 36, which I think is pretty poor for this car.
Any help appreciated - don't think I'll get anywhere back with Peugeot as no error code means no fault!
 

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jmkent said:
My 407 (2.0HDI 2005) isn't running all that well at times - it tends to hesitate on acceleration between 1500-1700rpm for a second, and then continues on as normal. This is normally after a gear change, then acceleration. The hesitation is only for a second, but I feel the car lurch and then go on, a bit like its being choked and then goes as normal. The problem has been around for the last few months, and although its been into Peugeot for service etc, they have found no fault as there are no error codes generated :(
Now I've been reading around, but I can only assume its something to do with the air intake in some how (numerous causes I believe). Can anyone give any way of testing if the following are working correctly:
- MAF sensor
- air manifold inlet temp
- MAP sensor (wherever it maybe?)
- EGR valve (again, wherever this is located?)
I'm not sure which of the above could be causing the symptons I'm experiencing, but its really starting to annoy me that its still there! I'm convinced that whatever it maybe is also causing more fuel to be used - average mpg is only 36, which I think is pretty poor for this car.
Any help appreciated - don't think I'll get anywhere back with Peugeot as no error code means no fault!
to me its sounds like the fuel not getting to the engine properly (clean/replace the Bosch Fuel Filter Assembly??) or Injectors ?? without plugging into Planet its very hard to tell..

Out of the above possible problems you have highlighted above, I suspect it could be the EGR too.. Its very easy to clean. PM me your Chasis number I should be able to get some diagrams for you..

cheers
 
J

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Discussion Starter #3
Scotcruz said:
to me its sounds like the fuel not getting to the engine properly (clean/replace the Bosch Fuel Filter Assembly??) or Injectors ?? without plugging into Planet its very hard to tell..

Out of the above possible problems you have highlighted above, I suspect it could be the EGR too.. Its very easy to clean. PM me your Chasis number I should be able to get some diagrams for you..

cheers
Thanks - PM sent.
Fuel filter all replaced - air in the diesel, thought that may be a problem, but hasn't made any difference.
The more websites I read, the more it sounds like the egr valve. As there is no error code for it when on diag. does this mean cleaning could solve it rather than replacing? Save plenty if so ;)
The egr was on their mind when I've asked Pug to look at it, but as there is no error code he wouldn't replace @ £200 in case it wasn't.
 
J

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Removing the egr valve - what an absolute nightmare job!
Wherever I read that said it could be done in half an hour obviously hasn't done one before. There is absolutely no room to work, can't get socket & ratchet on anything, even spanners can only just work on some. How would it even come out - from behind and below I presume, can't be from the top without removing all the air intake pipework.
In summary, couldn't get the 8mm bolts undone so cannot remove to clean - going to have to pay to have it done at the garage :(
Has anyone actually managed to get theirs off?
 
J

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:mad: Why won't they just take my advice - afterall, I've probably done part of their job for them anyhow... but yet again, all Peugeot want to do is 'run a diagnostic' .... can't they understand that they've done it before, it said no fault, they said no fault.... I know there IS a fault... but that damn computer doesn't think there is... something to be said for good old diagnosis :mad:

Anyway, rant over :)
 

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jmkent said:
:mad: Why won't they just take my advice - afterall, I've probably done part of their job for them anyhow... but yet again, all Peugeot want to do is 'run a diagnostic' .... can't they understand that they've done it before, it said no fault, they said no fault.... I know there IS a fault... but that damn computer doesn't think there is... something to be said for good old diagnosis :mad:

Anyway, rant over :)
http://www.youtube.com/watch?v=WOdjCb4LwQY
 
J

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Sums it up perfectly :D

And I thought it was going to be a video to help with my problem :p

Fallen out with Peugeot today - don't think they liked it because I refused to pay another £49.99 diag. charge when they've done one before and said no fault. Why is it that all they can do is plug in the laptop, what happened to the old way of fault finding?
 
J

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Discussion Starter #8 (Edited)
Bought some more tools and attempted to remove egr again, this time successfully. Cleaned out what I could (can't really get inside it properly to clean). All put back together on the car, and so far there isn't any change with the lurching on acceleration - fuel economy seems to be a little better at the minute, but still early days.
 
J

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Touch wood, it would seem that my fault is finally cured. I'd removed and cleaned the EGR valve twice, but to no avail, the problem remained. Took it in to Peugeot who hooked it up and said that nothing was showing a fault. Their technician went through the "book of problems" that they have from Peugeot, and as I'd thought myself, all the symptoms point to a faulty EGR valve, yet mine wasn't showing a fault. The technician believed a software update might be the cure, but couldn't do this as I still had the original EGR valve on the car, which isn't compatible with the new software... most apparently were replaced under warranty as they tended to fail - mine the exception! Peugeot didn't recommend replacing EGR and update software because the EGR wasn't showing a fault - leave it until it does fail, then they'll know for sure.
However, its been driving me crazy for months now, so I bit the bullet and had the EGR replaced (upgraded to latest version) and the software updated... and so far, so good. Touch wood, this was all it needed... albeit whether it was the EGR or the software, we'll never know :)
 

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Scot, could you tell me where my chasis number is so I can PM it to you? I dont have much time in work so I want to go right to it when looking for it.

I think I have a similar problem but don't want to rip my car apart unnecesseraly. Any info you could give me would be much appreciated.
:thumb:
 

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My 407 (2.0HDI 2005) isn't running all that well at times - it tends to hesitate on acceleration between 1500-1700rpm for a second, and then continues on as normal. This is normally after a gear change, then acceleration. The hesitation is only for a second, but I feel the car lurch and then go on, a bit like its being choked and then goes as normal.
I have a 307 (2.0HDI 2006) with the same symptoms.

There are two errors in the ECU

"permanent fault. EGR valve circuit. Valve position too distant in relation to the reference value" and

"Permanent fault. EGR solenoid valve. Test of cleaning on switching off the ignition not correct"

Any idea what it all means? I guess that the EGR valve is probably faulty but I'm not certain.

Also, any ideas out there whether the symptoms are caused by the EGR valve fault its self or is the ecu programmed to annoy you so you get the problem fixed?

Bill
 
C

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Discussion Starter #12
Could just be the egr try cleaning it first and clear fault codes, if it stays the same and fault codes return guess you'll need a new egr.
 
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