yeah true, I forgot about stew's experience,,, have you tried swapping the N75 and N18 valves? [but then I don't know if your engine has them or has the single black vacuum box,,,]
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yeah true, I forgot about stew's experience,,, have you tried swapping the N75 and N18 valves? [but then I don't know if your engine has them or has the single black vacuum box,,,]
yeah grrr. that car was sooo close to being sold on... amazing as once fixed its been the best car ive ever had!
Joyrider
Guest
Yeah, under accelleration it's fine, it's just when you take your foot off or keep it at a constant speed that it happens...
Housey80
Guest
I've got the same problem on my 54 Ibiza FR. Seems to happen to me when the car is warming up and when I accelerate very slowly in 1st or 2nd.
If I accelerate harder it seems to struggle for a second then suddenly shoot off. But if I accelerate normally or hard through the gears I've never had any hesitation.
Was going to ring Ted Johnsons to see if they can find anything, but it seems intermittent as it doesn't always do it.
If I accelerate harder it seems to struggle for a second then suddenly shoot off. But if I accelerate normally or hard through the gears I've never had any hesitation.
Was going to ring Ted Johnsons to see if they can find anything, but it seems intermittent as it doesn't always do it.
Joyrider
Guest
Will just have to hope it happens while I'm close to the dealership I guess...I've got to go back there anyway because when I took it in, some old biddy decided to reverse his car into mine on the forecourt and now I need a new bumper aswell 
Will mention the EGR to them while I'm there too...
Will mention the EGR to them while I'm there too...
bummer, sorry to hear that.
You can try mentioning EGR to them but they will probably look blankly at you, hope you get it sorted in the end.
You can try mentioning EGR to them but they will probably look blankly at you, hope you get it sorted in the end.
Sorry to resurrect an old thread but it might help someone.
I had this exact problem with my Cordoba 130/54 reg which has only 23000miles, last week it was hesitant/missing 1550-1800 revs only on light throttle, it just started happening and tied in with my first MOT, the elderly MOT tester said he had trouble getting it through the emissions test and said he had experienced this a lot of times with BMW and VAG diesels, and it was quite simply clogged injectors, and recommended I put Forte diesel injector cleaner or a similar heavy duty cleaner through it once a year.
I did this and half a tank later it runs like a dream, like when it was new, completely transformed to be honest.
My engine is not the later Euro4 spec engines that have an entirely different problem. So before taking it to Seat and changing various bits in vain it might be worth trying this. Must admit I am starting to reluctantly think that it might have been supermarket diesel that caused clogging the fuel system up.
I had this exact problem with my Cordoba 130/54 reg which has only 23000miles, last week it was hesitant/missing 1550-1800 revs only on light throttle, it just started happening and tied in with my first MOT, the elderly MOT tester said he had trouble getting it through the emissions test and said he had experienced this a lot of times with BMW and VAG diesels, and it was quite simply clogged injectors, and recommended I put Forte diesel injector cleaner or a similar heavy duty cleaner through it once a year.
I did this and half a tank later it runs like a dream, like when it was new, completely transformed to be honest.
My engine is not the later Euro4 spec engines that have an entirely different problem. So before taking it to Seat and changing various bits in vain it might be worth trying this. Must admit I am starting to reluctantly think that it might have been supermarket diesel that caused clogging the fuel system up.
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I can't see why clogged injectors would only cause problems at light throttle at very specific engine speeds though, would have thought it would result in general poor running/smokiness 
He said under hard acceleration its being forced through and less noticeable and under no load thats when its most noticeable and squirting in dribbles instead of a fine mist, but it really has fixed it. I stopped putting injector cleaners in cars years ago because I assumed fuel was a lot cleaner now, but I guess I was completely wrong.
it would be nice to know how joyrider solved his prob,,, [if he solved it since I can see from his sig that he's got a different car now,,,]
Joyrider
Guest
Every time I took it to the dealership the symptoms wouldn't show so the garage always said that unless they saw what was happening they couldn't do anything about it. They would never admit to having seen anything like it before (usual story...)
So I sold it.
Saying that though, I had some vaguely similar symptoms in my vRS (hesitancy, juddering etc) and it turned out to be a dodgy exhaust pressure sensor. Different engine and setup I suppose what with the DPF etc but you never know, might be worth checking....
It's a shame you never got to the bottom of it, but your symptoms were absolutely identical to mine, any gear at those rpm on light throttle it would miss/skip a beat, nothing at all booting it, nothing at all at idle, and always a bit juddery from cold in 1st and 2nd.
This old boy at the MOT place said those were usually the first symptoms and at worst not being able to start it all, and he'd seen it in BMW's with only 10-12,000 miles.
Got to be worth spending £15 trying the injector cleaner before anything more drastic, certainly made a dramatic difference to my car, and I'll use it once a year or every 10,000 miles from now on.
This old boy at the MOT place said those were usually the first symptoms and at worst not being able to start it all, and he'd seen it in BMW's with only 10-12,000 miles.
Got to be worth spending £15 trying the injector cleaner before anything more drastic, certainly made a dramatic difference to my car, and I'll use it once a year or every 10,000 miles from now on.
Joyrider
Guest
I hate those sort of things i.e. where it is obvious from reading this and other forums that it is a major problem, but where dealers can't pinpoint what it is.
You'd think they'd just get it sorted as they must know about it....guess it's a bit like the coil pack problem a few years ago in the 1.8T engines, took them ages and a stint on Watchdog before they'd admit there was a problem....
You'd think they'd just get it sorted as they must know about it....guess it's a bit like the coil pack problem a few years ago in the 1.8T engines, took them ages and a stint on Watchdog before they'd admit there was a problem....
Old thread resurection I know but it seems like the right place to put it.
I have the same symptoms. Light throttle between 1400-1700 rpm the engine will begin to shudder. It seems to be getting worse. No sign of it on closed throttle pedal or while the engine is pulling.
There are a few mods on my car and I seriously hope it's nothing I have caused.
It has a single mass flywheel so it can't be dmf related.
I replaced the Maf less than a year ago with a brand new Bosch one.
The EGR valve is still present and connected though there is a blanking plate at the bottom of the egr pipe.
I have an FMIC installed.
I have 2 ecus, one of which is mapped. The symptoms started while I was using the mapped one so I swapped back to the cars original one to see if the problem dissapeared, it hasn't.
Inside the egr valve has been inspected and it isn't choked up with carbon/oil deposits.
My thought process led me to suppose that the car might be trying to recirculate a lot of exhaust gasses at that throttle opening and because mine can't do so it might cause a choking effect, in turn the shudder, but it isn't there on overrun1 Hmmm
Sssstew will the disconnection of the vac pipe from the top of the egr valve dissable it's intervention and remove it as a possible cause?
I have the same symptoms. Light throttle between 1400-1700 rpm the engine will begin to shudder. It seems to be getting worse. No sign of it on closed throttle pedal or while the engine is pulling.
There are a few mods on my car and I seriously hope it's nothing I have caused.
It has a single mass flywheel so it can't be dmf related.
I replaced the Maf less than a year ago with a brand new Bosch one.
The EGR valve is still present and connected though there is a blanking plate at the bottom of the egr pipe.
I have an FMIC installed.
I have 2 ecus, one of which is mapped. The symptoms started while I was using the mapped one so I swapped back to the cars original one to see if the problem dissapeared, it hasn't.
Inside the egr valve has been inspected and it isn't choked up with carbon/oil deposits.
My thought process led me to suppose that the car might be trying to recirculate a lot of exhaust gasses at that throttle opening and because mine can't do so it might cause a choking effect, in turn the shudder, but it isn't there on overrun1 Hmmm
Sssstew will the disconnection of the vac pipe from the top of the egr valve dissable it's intervention and remove it as a possible cause?
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