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Discussion Starter #1
My 308 S has had a bit of a stutter for a while, mainly in low gear - the garage has diagnosed an incoherence in the variable valve timing solenoid but can't tell if it's the inlet or the exhaust.. Apparently they are identical but cost £96 each.

he's also not 100% sure if this is the fault.

Has anyone come across this situation before and can advise or enlighten me ?
 

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Discussion Starter #2
My 308 S has had a bit of a stutter for a while, mainly in low gear - the garage has diagnosed an incoherence in the variable valve timing solenoid but can't tell if it's the inlet or the exhaust.. Apparently they are identical but cost £96 each.

he's also not 100% sure if this is the fault.

Has anyone come across this situation before and can advise or enlighten me ?
Ok - got sent to garage with a proper peugeot diagnostics - mechanic there said it was very rare for these valves to fail, and the diagnostic didn't show anything wrong, but he said what normally causes this issue is the wrong oil, dirty oil or low oil...mine was a bit low but he said get it flushed and refilled with the correct oil and that 'should' fix it ! It goes back in the morning for them to do this, and if anyone is interested I'll report back whether it's fixed the problem.
 

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Also worth cleaning the screens on the solenoids as they clog if oil changes are missed
 

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Discussion Starter #5
ok, 2 weeks later and all seemed well, until this morning when the dreaded stutter was as bad as it had ever been, even in 3rd gear it was stuttering randomly . it felt a bit like the auto choke wasn't working but it still did it after the engine reached normal temperature.

A new thing though, there was a bad smell - like burning dirty oil sort of smell ? This was a bit alarming as it was a kind of 'hot' smell if you know what I mean.

So I don't know now what's up with it. It's so random (although was always prevalent first thing ) but on my return journey it was absolutely fine.
 

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Are you using the correct grade oil. My daughter's car had issues with timing faults when i used 0/40 instead of 5/30 trying to address high oil consumption switched back to correct oil and problems stopped
 

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Discussion Starter #7
Are you using the correct grade oil. My daughter's car had issues with timing faults when i used 0/40 instead of 5/30 trying to address high oil consumption switched back to correct oil and problems stopped
Yes, the garage flushed the system and filled with the correct grade, replaced the filter and cleaned the two solenoids. They said to try it for a few days and see how it went. It gradually improved over 4 or 5 days so I was happy we'd found the problem. However, as I posted, it all went a bit crazy the other day. One thing I have done in addition, yesterday, is to pour in some stuff into my petrol that cleans and clears the jets etc...just in case it's a fuel issue.

My other observation, having read up a bit about the smell I experienced, was whether it is a clutch problem ? That's either a slipping clutch (which I'd probably know about) or oil leaking onto the clutch ? I'm probably just grasping at straws now I suppose.
 

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Discussion Starter #8
I read somewhere that a 'clogged' up camshaft solenoid can affect the fuel supply..I wonder if this is related to my 'stuttering' issue, which is still happening but much reduced. The smooth acceleration I had before this issue is interspersed with what feels like 'flat spots'.. Don't know whether to just live with it or keep chasing down the issue. The diagnostic didn't find anything electrical, but I also read there is a history within the diagnostic that records certain issues ? Not sure I've described this right, but is it worth having it checked. I've a local garage with the peugeot diagnostic m/c ..is it worth going back and having a word ? I'm really stumped with this tbh.
 

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Discussion Starter #9
Things have moved on with this now- cold weather has worsened the situation. last 2 mornings, got in car, started up..tickover ok, put into 1st, foot on accelerator..goes about5 yards then just slows down and revs drop even when foot is half way down accelerator. So take foot of pedal, then push down again and nothing for a few seconds..then it revs and moves off...and carries on with this cycle of 'dying' them picking up for a few minutes.

Later in the day I sat in the car as it was ticking over, parked, put foot on pedal and nothing happened, no revs increase - it's like it's flooded although I can't smell any petrol.

Today it actually 'died' on me while I was driving, while the engine was still cold..which is worrying..it didn't stall, just no acceleration...so it slowed down (was going up a hill).

Eventually, as the car slowly warned up this problem went away, although it continued to stutter in all gears...hesitant acceleration, and not a smooth gear up acceleration - can feel the car sort of bumping along although not so severe it slowed me down much.

It feels like it's going to die at any moment, and it also seems to take ages warming up although it does get 90c eventually...similarly the heater takes ages to push through hot air.

I don't know if the two are related or just a coincidence.

I don't have any warning signals flashing up, there's fuel in the tank, etc

So anyone any ideas now ? From years gone by i'd think it was a dirty fuel filter, or a blocked jet..but with modern day cars I just don't know what to think.
 

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Discussion Starter #10
Took car into a peugeot garage (local)...and the news is bad.

they've rung me this morning saying it needs a new temperature control housing including thermostat, sensors etc..system drain (again)..and 3 hours labour.

Not much change from £400.

This had better sort it out

:eek:
 

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Discussion Starter #11
Right , had all that done...heater now 100% good...stutter gone away....until couple of days ago...setting off, cold engine...and stuttering away as before !!!

I despair now, having spent so much. It 'feels' like their is no auto choke and it's like the old cars where you pulled out the choke lever (remember ?)...and if you didn't you stuttered along or stalled until the engine warmed up - that's what it reminds me of but without the stalling.

Think I might just sell it , I am fed up with mechanics ...and spending seemingly unnecessary cash.
 

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Do you know if they reset the adaptives when the changed the housing etc as this can have a major affect on cold starting if incorrect values are learned
 

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Discussion Starter #13
Do you know if they reset the adaptives when the changed the housing etc as this can have a major affect on cold starting if incorrect values are learned
I don't know , what are the 'adaptives' ? I can ask the mechanic...thanks
 

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The learned values in the ECU. There is a reset sequence within planet/diagbox which when run requires a cold start with no load (a/c Heated rear window off etc) and then leave the car to idle until fan starts then take the car for a run using all gears and reving to at least 4K rpm and letting engine over run etc.

This cured cold start issues with daughters car after changing coolant sensor and cleaning solenoids etc
 

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Discussion Starter #15
The learned values in the ECU. There is a reset sequence within planet/diagbox which when run requires a cold start with no load (a/c Heated rear window off etc) and then leave the car to idle until fan starts then take the car for a run using all gears and reving to at least 4K rpm and letting engine over run etc.

This cured cold start issues with daughters car after changing coolant sensor and cleaning solenoids etc
Thank you for that, sorry to sound a bit dense but what do you mean by "engine over run etc" ?
 

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Thank you for that, sorry to sound a bit dense but what do you mean by "engine over run etc" ?
Drive car and accelerate threw gears and in around 3rd rev to above 4k revs then take foot of gas and let car slow down without braking etc until revs drop to around 1k.

Sent from my SM-G935F using Tapatalk
 

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Discussion Starter #17
Drive car and accelerate threw gears and in around 3rd rev to above 4k revs then take foot of gas and let car slow down without braking etc until revs drop to around 1k.

Sent from my SM-G935F using Tapatalk
I took the car back to the garage (again) and left it overnight for them to do this reset...the mechanic said he knew what to do. Car been ok for a while but guess what, it's back to exactly where it was months ago ! Set off y'day am - 1st gear..nice and steady, into 2nd and 1500rpm then it just slowed down , jumped forward, slowed down again, jumped forward again...all the time the rpm was 1500 and my foot half way down the pedal ..then it jerked and lunged to lesser degrees for the net 30 minutes, in all gears..even when doing 50mph in 4th/5th I could feel a slight hesitation - and putting the foot further down on the gas didn't increase the rpm or speed. On my way home 3 hours later it was fine ! .... I can't sell it like this and Ican't seem to get it fixed. I've spent £400 so far and it's not sorted.
 

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Assuming the engine is petrol, not diesel, this sounds to me like an ignition issue. New plugs and a coil pack?
 

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Discussion Starter #19
Am wondering , having read a few other posts, if this could be a fuel pump issue ? There are no warning messages on the diagnostic screen in the car when this issue arises but I read that fuel pressure doesn't get monitored on the cars diagnostics...not sure if that's right.

I know the part is about £200+ but maybe I could get one from the scrap yard and try that first ?

Any thoughts from those who know more about this stuff than me ?
 

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The posts you have read regarding fuel pumps will be from the turbo engines with the cam driven pump its a different system on yours so pump is unlikely to ever give problems
 
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