Acceleration Fluctuating Problem

[Fallen Angel]

This problem has been going on for a while now, i've wasted 3 days pay with Seat previously sorting it and it going wrong again and i can't afford to take it back to them again

The car idles fine, but when in first gear, picking up normal speed, and between 2-3000 revs, the revs drop off sharply as if i've lifted my foot off the pedal, until i put my foot down a little more, at which point boost kicks in.
The last time i took it to Seat, they said a pump hose supplying the turbo had come off, they apparently put it back on.

A week after i fit my forge intercooler, i get that same feeling again

I'm at the end of my teather with this now, and i'm worried something else is wrong and is going to end up costing me megas bucks

It's taking the fun out of driving my car totally

PLEASE HELP ME

 

[goble]

fly by wire throttle body is faulty

 

[Fallen Angel]

Ah right , that actually sounds very possible, is that expensive to replace and can it be done be a competant person?

 

[Fallen Angel]

I just thought, if the throttle body was faulty, wouldnt the engine management light come on and would it not show on diagnostics??

 

[Fallen Angel]

Took it to Seat again, no fault came up, he took it out for a spin, did nothing, i took him out for a spin, nothing. He said it could be anything but wasn't willing to guess and spend my money for me and it be wrong.

He mentioned the following:
Coolant temperature sensor
Charger Sensor
Air Flow Sensor

Any of these sound about right??

 

[longman]

This is a common problem that lots of people on here seem to have. Its been described slightely differently but I have exactly the same problem. Its definitely an intermittant prob too.

I would really be interested to hear if you have solved it, I have tried MAF (Air Flow Sensor), N75 (Boost Control Solenoid) and resetting the ECU and Throttle Body alignment but it always comes back.

Goble, any idea what sort of job this Fly By Wire TB is to change? I did wonder if it was the Sender from the peddle for a bit.... Is that a possibility?

 

[Fallen Angel]

Well im going to try the coolant temp sensor i think first as this had also been mentioned in Golf+ mag last issue.

I think the quickest way to explain my problem is a serious flat spot

 

[Alice_Cupra]

I have noticed that mine is doing exactly the same thing (Leon Cupra R), and it seems to be at about the same revs as yours.

No warning lights, no other problems, just (as you describe) a huge flat spot around 2-3000rpm in 1st gear.

At first I thought it might be over-sensitive ESP, but I don't get any lights on the dash to say that it is kicking in, so have ruled that out.

I have some time off work soon, so may be able to drop mine into a dealer and see if they can come up with an answer - Unless you manage to get a decent answer first, of course......

 

[longman]

Matt.

Interestiing that an LCR is having the same problem. Have a look at this link:
http://www.seatcupra.net/forums/showthread.php?t=116156

It might help you. I checked my pipe work in that area last night. (Just as the thunder started) But nothing. No oil mist or pipe splits.

Its really frustrating!!!!

 

[Fallen Angel]

Problem solved, after being charged twice by Seat for a diagnostic and them coming up with nothing, my Lamda sensor failed just over a week ago, my mate serviced the car and fitted new Bosch sensor, it's running lovely now and i'm fairly certain the stuttering has gone and this was the cause