Technical revs increasing

[steveski2013]

Hi, I have a 2016 130 ducato and i have a problem where the revs rise by 250 - 500 rpm when going down the gears the amount of revs varies and it doesn't do it all the time, i have had it to the dealers and they have seen it happening but have no idea what it is and say its normal, i just wondered if anyone had any pointers as to what the problem is or if it is normal. Thanks

 

[Joiner]

I have a 2015 van with the same thing.

Not sure if this is to help the gearchange. Bit like the old style of blipping the throttle to change down. Is the gearbox that weak that it needs all the help it can get ?

Also seems to run on when dipping the clutch to come to a stop. Not very welcome at that point.

Can only presume it is another part of the ECU, which might cause trouble in the future !!

Gearbox to be removed in the next few weeks to sort possible 2nd and 3rd gear synchro problems. Here`s hoping it is covered by warranty.. Only dome 60,000 miles and only 2000 by myself.
Already had a new DPF and now also a beating sound from the engine at 1900 to 2500 revs.

Shouldn`t have sold my 2007 Ducato.

 

[steveski2013]

Thanks for the reply, sounds like you have the same issue, just to update you, the fiat dealer also now says it could be a clutch issue but to investigate I would have to agree to pay for it to be stripped down (£385) if there was no defect, if a defect is found with the clutch or DMF I wouldn't have to pay , so it would be interesting to know if a defect is found with your clutch that may cause it. mine's only done 5600 miles

 

[steveski2013]

I have been experimenting for the last week or two and have found that if I brake and use the clutch together the revs increase as I change down, but if I use the clutch on it's own( no braking) the revs don't increase, does anyone have any idea how these two things are connected? Any pointers would be appreciated, thanks

 

[Crossingkeeper]

The clue could be in that operating the clutch doesn't AFAIK involve any electrical load while the brake pedal of course operates the brake lights.

I recall that another thread on the forum concluded that a battery discharge would result in an increase in revs as the ECU attempted to compensate by increasing alternator output.....so it might be worth measuring battery voltage when the revs increase to check this.

 

[steveski2013]

Cheers for that, it's an interesting point, going to go to dealers and put my findings to them and see if they come up with anything, now I have got something to suggest to them,

 

[Joiner]

Well I must say Steve you have a very reasonable dealer as regards costs.
I have just left my van today with a main dealer to remove the gearbox due to a gear selection issue when cold.

Told last week, if Fiat do not stand on as a warranty claim then the cost to me will be £2300 for removal, strip and repair and refit PLUS the cost of a clutch which I had asked to be fitted anyway seeing as the box is out.

£385 to take out and refit a gearbox seems cheap in comparison.

Seemingly until the box is out, and on the floor, in bits, then that is when Fiat decide if they will honour a claim. Great, Eh!!!!!!!

 

[steveski2013]

Yeah they hold all the cards it seems,

 

[steveski2013]

As for cost my worry was £385 to get it out and look at but where does it go from there they went to great lengths to tell me that is it was due to wear it probably wouldn't be covered and with 6000 miles on it I think that's when the arguments start, if I'm honest they didn't seem too keen on taking the box out, with regards to your info quote it seems very excessive, but again they hold all the cards, hope fiat come good with the warranty, I'm still investigating other avenues atm

 

[Joiner]

Well just collected van on Wednesday and all seems good so far.


New 2nd gear and syncro plus a new clutch.

Total bill was £284 inc VAT for the clutch only.

Fiat stood on as regards warranty for the gearbox. That was a relief.

Here`s hoping it all stays reliable now

 

[steveski2013]

Hi joiner, I'm pleased you got yours sorted, has the change of clutch sorted the problem with the revs rising when changing down?

 

[Joiner]

No Sir.

Still the same but only really noticeable when drawing up to a stop and keeping the clutch depressed.

To be honest I am not that worried as long as the bloody thing is reliable.

The amount of stuff in the equation now a days problems like this could take forever to fathom out. What ever happened to a mechanical fuel pump controlled by a bit of wire to your right foot and a govenor to stop it running away with itself.

Am I ancient to remember vehicles that used to be like this !!!!!!!!!!!!!!

 

[steveski2013]

No , at least you knew where to start in them days ?