Technical MultiJet 'misfire'?

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Technical MultiJet 'misfire'?

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Hi folks

My 4x4 MJ (2108, Euro 6, 95bhp) will be off to the dealers in the next few weeks for it's first "Paddington Service" (little more than a 'long hard stare'... since at 12,000 miles the lists of 'operations to be performed' seem only to be 'have a look at...', with nothing changed or replaced!) Bet it's expensive - anyone know how much? I might ring around a few dealers to get a price, as my nearest, Glyn Hopkin are not the cheapest.

Mine has developed a tendency to 'misfire' at part throttle under load, such as going up a hill where you don't actually need to change gear (engine at 1500-1800 rpm). The harder you press throttle, the more pronounced it becomes. Any clues as to what this might be? I believe max torque is at 1500 rpm, so it should be capable at these engine speeds (certainly my previous 75bhp MJ would willingly 'lug' at these low revs). Its fine at all other times... I will ask them to take a 'harder look' when its at the garage, but would be handy to help 'guide them' as to what to look for.
 
If it was my car I'd price up oil change, pollen filter and fuel filter drain. And run it on Shell V Power Diesel. :)
 
Sounds like a EGR valve problem.

If the EGR fails to close quickly enough when you throttle up they can misfire or stutter, as it's now fueling up but the air is choked with exhaust gas.

You notice it most after a steady cruise as the engine runs lean and the valve is open and suddenly you're after instant power and the valve should shut but doesn't, hence the hiccup.

With a sticky valve on the over run, you usually stop and idle and this usually gives the valve time to catch up, so you don't always notice the hiccups.

I've suffered this at some point on nearly every modern diesel I've owned.
The old Euro 5, none electronic valves you could get away with tapping them to loosen off the soot that clogs them up, for a while.
Modern electronic valves usually want cleaning out or replacing.

I seem to think the valve on theses are pretty hard to get at to inspect yourself, but I'm sure you can log the valves action with something like MES on a run.
 
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Yeah the egr on the 1.3 is burried at the back of the engine and on the 500 and panda can't only be accesedt from underneath and the mounting bolt can only really be found by touch alone
 
Thanks all.
My Multipla used to suffer EGR issues (mainly used on short runs), but never had issues with the Pandas before (tend to do fairly high mileage). Maybe part of the newer Euro6 engine set up?
And yes, will price oil change too... 12k on the oil it came out of the factory with seems better than waiting to 24,000 (as per handbook). Pollen filter - maybe not yet, only 8 months old. Fuel drain - doubt there's anything in there (previous car had nothing at 60,000 miles)
 
Had second pollen filter after 6k and 9 months. Mate did it. Filter £5.91. Wasn't unmarked but he reckons 20k miles about right or 2 years. Why Fiat suggest yearly change aside from vast mark up on the work can't imagine.....:rolleyes:
 
Had second pollen filter after 6k and 9 months. Mate did it. Filter £5.91. Wasn't unmarked but he reckons 20k miles about right or 2 years. Why Fiat suggest yearly change aside from vast mark up on the work can't imagine.....:rolleyes:
My Panda's 2018 handbook shows the pollen filter to be changed every two years (but is 'optional' at 12 months. I will wait...)
 
Had second pollen filter after 6k and 9 months. Mate did it. Filter £5.91. Wasn't unmarked but he reckons 20k miles about right or 2 years. Why Fiat suggest yearly change aside from vast mark up on the work can't imagine.....:rolleyes:

If you lived in central Rome..Paris..Madrid

It will have seen THOUSANDS of filthy hours by 20k ;)


Fully agree on oil changes.

Especially the 1st change... build detritis..and minor pollutants from 'break.in'.

Then it should have CLEAN OIL.
 
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Sounds like a EGR valve problem.

If the EGR fails to close quickly enough when you throttle up they can misfire or stutter, as it's now fueling up but the air is choked with exhaust gas.

You notice it most after a steady cruise as the engine runs lean and the valve is open and suddenly you're after instant power and the valve should shut but doesn't, hence the hiccup.

With a sticky valve on the over run, you usually stop and idle and this usually gives the valve time to catch up, so you don't always notice the hiccups.

I've suffered this at some point on nearly every modern diesel I've owned.
The old Euro 5, none electronic valves you could get away with tapping them to loosen off the soot that clogs them up, for a while.
Modern electronic valves usually want cleaning out or replacing.

I seem to think the valve on theses are pretty hard to get at to inspect yourself, but I'm sure you can log the valves action with something like MES on a run.

My Bravo EGR has played up, but since using cleaner I have run with diesel cleaner Wynns additive and had no trouble for many miles. I am no fan of the EGR valve! Incidentally the Fiat part price was much cheaper than any of the Motor factors. WHen it did play up it was limp home mode every time. Just loss of power till sorted and ECU reset.
 
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