Accelerating up and down above 3000 rpm

cab · Jan 13, 2017

morning

Can anyone help tell me what this could be. 94 disco 1 TDI when I get around 3000rpi the car feels like foot slipped off accelerator on and off in fairly quick succession?

Does not slow down much but at that rpi it is very noticeable.

Thanks in advance

Colin

Dippypud · Jan 13, 2017

200TDi ?

Auto or Manual ?

cab · Jan 13, 2017

Manual 2.5 l

julianf · Jan 13, 2017

Mine wouldn't rev much above 3000 once - turned out to be rubbish on the gauze of the lift pump, blocking fuel flow.

If its fuel related, on and off power sounds more akin to minor air leak under powers though, than simple restriction.

That said, I did once read of someone having issues with their sedimenter where they got intermittent blockage.

One last thing - does it smoke when doing it? I've also heard (no personal experience) of the air duct pre turbo collapsing in under high flow, but I suspect that would cause it to smoke.

I'd do the fuel and air filters, and the sedimenter, and move on from there.

cab · Jan 13, 2017

julianf said:
Mine wouldn't rev much above 3000 once - turned out to be rubbish on the gauze of the lift pump, blocking fuel flow.

If its fuel related, on and off power sounds more akin to minor air leak under powers though, than simple restriction.

That said, I did once read of someone having issues with their sedimenter where they got intermittent blockage.

One last thing - does it smoke when doing it? I've also heard (no personal experience) of the air duct pre turbo collapsing in under high flow, but I suspect that would cause it to smoke.

I'd do the fuel and air filters, and the sedimenter, and move on from there.

Many thanks

cab · Jan 13, 2017

julianf said:
Mine wouldn't rev much above 3000 once - turned out to be rubbish on the gauze of the lift pump, blocking fuel flow.

If its fuel related, on and off power sounds more akin to minor air leak under powers though, than simple restriction.

That said, I did once read of someone having issues with their sedimenter where they got intermittent blockage.

One last thing - does it smoke when doing it? I've also heard (no personal experience) of the air duct pre turbo collapsing in under high flow, but I suspect that would cause it to smoke.

I'd do the fuel and air filters, and the sedimenter, and move on from there.

Many thanks. Makes sense

wammers · Jan 13, 2017

More than likely fuel starvation, but if fuel checks out. Outside chance have a look for a leak turbo to boost diaphragm.

cab · Jan 31, 2017

julianf said:
Mine wouldn't rev much above 3000 once - turned out to be rubbish on the gauze of the lift pump, blocking fuel flow.

If its fuel related, on and off power sounds more akin to minor air leak under powers though, than simple restriction.

That said, I did once read of someone having issues with their sedimenter where they got intermittent blockage.

One last thing - does it smoke when doing it? I've also heard (no personal experience) of the air duct pre turbo collapsing in under high flow, but I suspect that would cause it to smoke.

I'd do the fuel and air filters, and the sedimenter, and move on from there.

Correct and thanks. All gunned up. New filter, and cleaned out sedimentor and blew fuel lines back. Running great now.

Cheers

Accelerating up and down above 3000 rpm

cab

Member

Dippypud

Never Knowingly Understood

cab

Member

julianf

Well-Known Member

cab

Member

cab

Member

wammers

No longer with us, RIP

cab

Member

Similar threads