Mondeo Vibes through Accelerator @2000-3000rpm. DMF Problem?
Discussion
'59' Mk4 Mondeo TDCI 140
I appear to have a vibration through the accelerator pedal. It is a fairly mild vibration at tickover, but (when on the move) it increases in amplitude from around 2000rpm and peaks as an unpleasant, harsh "buzz" (like you'd get from drilling concrete) at around 2750-3000rpm. Above 3000rpm it tails off (I'm aware of the concepts of harmonics, resonance etc.).
If I dip the clutch/shift into neutral and ease up on the accelerator the accelerator the buzz returns to that of idle.
Are these symptoms of impending DMF destruction?
The car is only 2 years old so I could approach Ford, who will probably try to tell me that,
"they all do this, sir".
ps. My trusty Mk3 Mondeo never did this.
I appear to have a vibration through the accelerator pedal. It is a fairly mild vibration at tickover, but (when on the move) it increases in amplitude from around 2000rpm and peaks as an unpleasant, harsh "buzz" (like you'd get from drilling concrete) at around 2750-3000rpm. Above 3000rpm it tails off (I'm aware of the concepts of harmonics, resonance etc.).
If I dip the clutch/shift into neutral and ease up on the accelerator the accelerator the buzz returns to that of idle.
Are these symptoms of impending DMF destruction?
The car is only 2 years old so I could approach Ford, who will probably try to tell me that,
"they all do this, sir".
ps. My trusty Mk3 Mondeo never did this.
Does the vibration stop when you push the clutch pedal to the floor? Mine was rattling (volvo V50), especially after an hour journey. It would stop when I pushed the clutch in which would make sense as you're pushing the release bearing onto the pressure plate and squeezing the whole lot together.
I think that the vibration is still there with the clutch pedal pressed -I'll do more experimenting later.
It seems to be independent of gear/road speed. I drove along at 3000rpm in first gear yesterday and the vibration was present. With the bonnet open revving the engine to 3000rpm didn't produce any obvious rocking or vibration of the engine (I had my hand on the top cover) above that of the usual sort of diesel engine shakes.
It seems to be independent of gear/road speed. I drove along at 3000rpm in first gear yesterday and the vibration was present. With the bonnet open revving the engine to 3000rpm didn't produce any obvious rocking or vibration of the engine (I had my hand on the top cover) above that of the usual sort of diesel engine shakes.
MC Bodge said:
I think that the vibration is still there with the clutch pedal pressed -I'll do more experimenting later.
It seems to be independent of gear/road speed. I drove along at 3000rpm in first gear yesterday and the vibration was present. With the bonnet open revving the engine to 3000rpm didn't produce any obvious rocking or vibration of the engine (I had my hand on the top cover) above that of the usual sort of diesel engine shakes.
Well I'm not convinced it is the flywheel in that case, although I'm no expert. Also I'm not sure why you'd get the vibration through the accelerator pedal. Mine could be felt knocking through the clutch pedal at times which makes more sense to me being hydraulic.It seems to be independent of gear/road speed. I drove along at 3000rpm in first gear yesterday and the vibration was present. With the bonnet open revving the engine to 3000rpm didn't produce any obvious rocking or vibration of the engine (I had my hand on the top cover) above that of the usual sort of diesel engine shakes.
Indeed.
I'm not suffering the symptoms I'd expected of DMF problems (I'd expect there to be issues at low rpm), but it is a known issue, hence asking the question.
There appears to be a resonance that manifests itself at 2000-3000rpm.
A buzz through the throttle (it can be felt by hand whilst travelling along. Don't try this at home kids.) suggests to me that something might be causing the bulkhead to vibrate. An engine mount, a pipe or a shield?
I'll try to have a look later, although the turbo is blocking the view from above.
I'm not suffering the symptoms I'd expected of DMF problems (I'd expect there to be issues at low rpm), but it is a known issue, hence asking the question.
There appears to be a resonance that manifests itself at 2000-3000rpm.
A buzz through the throttle (it can be felt by hand whilst travelling along. Don't try this at home kids.) suggests to me that something might be causing the bulkhead to vibrate. An engine mount, a pipe or a shield?
I'll try to have a look later, although the turbo is blocking the view from above.
I tested the engine mounts by having an assistant gently engage the clutch in-gear whilst I watched the engine.
The engine did appear to rock 'backwards' without much resistance rather than progressively. It is difficult to tell whether it is moving more than normal, so I'll have to look underneath the car.
The engine did appear to rock 'backwards' without much resistance rather than progressively. It is difficult to tell whether it is moving more than normal, so I'll have to look underneath the car.
Nick1point9 said:
Just take it to ford, this is what warranties are for.
I may be in a small minority, but I like to have an idea of what the problem is before I take things to be looked at by others, to satisfy my own curiosity and to have some sort of riposte to the "they all do that, sir" style remarks that I've, genuinely and erroneously, experienced at Ford dealers in the past.Simple test that you may have already tried. Leave the car at idle with the engine running and slowly apply the clutch. Does the juddering go away? If not, slowly press the peddle constantly and evenly for a few pumps and see if it goes away after pressure in the pedal gets firmer (if it does). Check the colour of the fluid and make sure it's golden. Sounds to me like you're losing hydraulic pressure through contaminated fluid. Could be wrong but it's a simple test.
My car went into the local Ford dealer today. having thoroughly checked the car inclusing driving it up and down the local motorway, the results are in.............
.....Drumroll.......
They didn't find anything wrong with it!
apparently it wasn't vibrating
Unfortunately I wasn't able to collect the car myself otherwise I'd have offered to sit in during the test to point out when the vibration was taking place.
To satisfy myself that I wasn't going mad, I took the car out when I got home:
Sure enough, at 3000rpm in 1st, 2nd and in 3rd gears there is still a definite resonance from the engine that is buzzing through the accelerator pedal.
It may well be the case that,
"They all do that", but a buzz at 2500-3000rpm is very annoying in a motorway-munching car.
I'm going to give the car a good looking at over the weekend. when I find the cause I'll be educating the Ford dealer, as I did with the hidden thermostat fault on my Mk3.....
.....Drumroll.......
They didn't find anything wrong with it!
apparently it wasn't vibrating
Unfortunately I wasn't able to collect the car myself otherwise I'd have offered to sit in during the test to point out when the vibration was taking place.
To satisfy myself that I wasn't going mad, I took the car out when I got home:
Sure enough, at 3000rpm in 1st, 2nd and in 3rd gears there is still a definite resonance from the engine that is buzzing through the accelerator pedal.
It may well be the case that,
"They all do that", but a buzz at 2500-3000rpm is very annoying in a motorway-munching car.
I'm going to give the car a good looking at over the weekend. when I find the cause I'll be educating the Ford dealer, as I did with the hidden thermostat fault on my Mk3.....
Edited by MC Bodge on Tuesday 7th February 20:49
Sadly ford dealers wont find anything wrong until it falls on its arse.
We have Transits which we have reguler EGR valves replaced and the last one was revving and dropping like no ones buisness and they said, nothing wrong no fault codes showing. You dont need fault codes when your sitting in something thats like a bucking bronco. Took it to my mates garage, one new EGR and all is smooth again.....
Alarm in another transit was always going off even when driving. Took it to Ford, not their alarm fitted, so not their problem. So took the 'ford emblemed' alarm fob to get it fixed elsewhere. And, yes was a ford alarm, because thats how they came to us.......
Useless with a capital U...............
Just tell them its wrong, get a technician to look at it. Take them out for a drive and show them the problem.
We have Transits which we have reguler EGR valves replaced and the last one was revving and dropping like no ones buisness and they said, nothing wrong no fault codes showing. You dont need fault codes when your sitting in something thats like a bucking bronco. Took it to my mates garage, one new EGR and all is smooth again.....
Alarm in another transit was always going off even when driving. Took it to Ford, not their alarm fitted, so not their problem. So took the 'ford emblemed' alarm fob to get it fixed elsewhere. And, yes was a ford alarm, because thats how they came to us.......
Useless with a capital U...............
Just tell them its wrong, get a technician to look at it. Take them out for a drive and show them the problem.
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