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+--- Thread: Intermittent 'flat spot' 2000-3000 rpm (/showthread.php?tid=11188)
Intermittent 'flat spot' 2000-3000 rpm - C.A.R. - 22-02-2013
Well found this yesterday, bit of a strange one.
Went to overtake a car in 4th and as I powered from about 2000rpm the car seemed to hang back then lurch forward, almost like it had clutch slip (but it wouldn't at that speed?!). Managed to re-create the problem in 3rd on the same journey, it's like a momentary flat spot, like when a petrol car bogs down?
Possible sensor problem?
Gave it a good thrashing on the way to work this morning once everything had warmed up, problem didn't occur again.
RE: Intermittent 'flat spot' 2000-3000 rpm - londondan86 - 22-02-2013
Fuel filter? Not too clued up on the electronic side of these cars yet
RE: Intermittent 'flat spot' 2000-3000 rpm - C.A.R. - 22-02-2013
Thing is it had a service 6000 miles ago, genuine filters etc. Everything was spotless in the filter housing too. So I doubt it could be that? But willing to eat my words!
RE: Intermittent 'flat spot' 2000-3000 rpm - Just Sean - 22-02-2013
only a couple of quid to change aint it!
RE: Intermittent 'flat spot' 2000-3000 rpm - andywhy - 22-02-2013
I've read that injectors can cause this at the RPM's you describe. Others will confirm if this is the case.
RE: Intermittent 'flat spot' 2000-3000 rpm - Ruan - 22-02-2013
Doubt fuel filter, if it was enough to cause a massive rail pressure drop, the ECU would long have detected it and killed the engine, thinking that requested vs actual is so low there must be a fuel leak.
I'd go with either possible MAF problems... See if you can recreate it now?
RE: Intermittent 'flat spot' 2000-3000 rpm - C.A.R. - 22-02-2013
Managed to make it do it on the way home, the revs shoot up but there is no real progress, then the engine kind of 'catches' and launches forward at full power again. It is like clutch slip but it would surely happen in lower gears too?
Very odd sensation...
RE: Intermittent 'flat spot' 2000-3000 rpm - Ruan - 22-02-2013
Nah, taht's just clutch slip I'm afraid.
Won't happen in lower gears as it's easier for the engine to move the car than it is to slip the clutch, so it shoves the car forwards instead. Perfectly normal for a clutch to only slip in higher gears.
RE: Intermittent 'flat spot' 2000-3000 rpm - C.A.R. - 22-02-2013
So I should start looking for a replacement clutch then? Car has done 100k so it's done well, don't know how hard the previous owner drove it but it is on a stage 1 map.
Easy job on a HDi?
RE: Intermittent 'flat spot' 2000-3000 rpm - Ruan - 22-02-2013
It's not too bad to be honest, but in total honesty, just as long as you don't let the clutch slip, I bet you it'll be fine for another few thousand miles yet, long as you don't HOLD the power on whilst it's slipping, it'll last.
RE: Intermittent 'flat spot' 2000-3000 rpm - cully - 22-02-2013
what Ruan says mine slips in high gears if i miss a cog or rest me foot on the pedal
ive learned to live with it by letting off and letting the clutch catch up once it starts
mines on 105Kmiles so its due for a new one and apparently around the same time tank fuel pumps go wrong too
so could be an expensive time soon
RE: Intermittent 'flat spot' 2000-3000 rpm - Poodle - 22-02-2013
There's a couple for sale at the moment at good prices in the parts section, best be quick.
RE: Intermittent 'flat spot' 2000-3000 rpm - C.A.R. - 22-02-2013
I'll have a butchers now, skint til next week though.
One thing that sprang to mind, is it just coincidence that its started to go or could it be a knock on effect of refilling the gearbox oil last weekend? Just seems odd that its all happened at once.
RE: Intermittent 'flat spot' 2000-3000 rpm - Jonny81191 - 22-02-2013
If you spilt the oil absolutely everywhere and some got in the bellhousing then it's a possibility. But realistically no it won't have effected it.
RE: Intermittent 'flat spot' 2000-3000 rpm - cully - 22-02-2013
unless you over filled it and its pushed past the seals
RE: Intermittent 'flat spot' 2000-3000 rpm - C.A.R. - 22-02-2013
Ok
(22-02-2013, 05:46 PM)Poodle Wrote: There's a couple for sale at the moment at good prices in the parts section, best be quick.
I had a look but couldn't find anything...
RE: Intermittent 'flat spot' 2000-3000 rpm - JamesG - 22-02-2013
(22-02-2013, 03:34 PM)C.A.R. Wrote: So I should start looking for a replacement clutch then? Car has done 100k so it's done well, don't know how hard the previous owner drove it but it is on a stage 1 map.
Easy job on a HDi?
HDI clutch is fairly easy to do i managed to do it on mine first time I've done a clutch in 6hours the only thing that was a PITA was the Torx bits that held the clutch on the flywheel i had to gingerly cut one of mine off and get new ones all round.
Quote:"Poodle Wrote:
There's a couple for sale at the moment at good prices in the parts section, best be quick.
I had a look but couldn't find anything..."
What parts are you looking for as i am breaking a HDI currently
RE: Intermittent 'flat spot' 2000-3000 rpm - C2K - 23-02-2013
As above, clutch slip. It won't deteriorate that fast, mine lasted ages like that til I had the time to do it.
Quite straightforward as clutches go, not too bad at all.
RE: Intermittent 'flat spot' 2000-3000 rpm - declantg - 23-02-2013
What more of an excuse to go stage 2?
RE: Intermittent 'flat spot' 2000-3000 rpm - C2K - 23-02-2013
The fact he has a little person to think of and needs a reliable car??
RE: Intermittent 'flat spot' 2000-3000 rpm - declantg - 23-02-2013
(23-02-2013, 08:02 AM)C2K Wrote: The fact he has a little person to think of and needs a reliable car??
That's a pretty good reason, I guess
RE: Intermittent 'flat spot' 2000-3000 rpm - Toms306 - 23-02-2013
Mines been slipping like that for 3k miles now....
