Hi,

I have 2 problems with my engine :

1)
I had a leaking injector (tested with a VW 1552 test unit) so I had all the
injectors cleaned, injector filters replaced and also replaced the fuel
filter. After that the car suddenly has a cold start problem.
The engine only turns on when I press the accelerator a bit. Even with a
cold start the rpm is immediately at about 850rpm instead of the normal
1000+ rpm. Warm starts are ok.

2)
When driving the car holds back a bit between 4000 and 4800 rpm. After that
it seems like normal. However, boost pressure is down about 0,1 bar and the
car feels slower than before. When I unplug the sensor immediately after the
air filter (air mass sensor ?, don't know the english word) the car runs
fine again at full throttle and feels faster than with the sensor connected.


I heard a guy who works at Skoda that the first problem might be the
temp.sensor for the cooling fluid because this also send a signal for a
richer mixture with cold start and with maximum load for the engine. Can
anyone confirm this and tell me where I can find the sensor on the engine ?

He also thought for the second problem that the air mass sensor might be
broken. However, the car is runing quite normal except when stepping on it.
Any other possible causes (and solutions) for this ?


Thanks,

Richard
The Netherlands

 

"ries" <NOSPAMriwa@wanadoo.nl> wrote in message
news:3f43b49d$0$45377$1b62eedf@news.wanadoo.nl...
> Hi,
>
> I have 2 problems with my engine :
>
> 1)
> I had a leaking injector (tested with a VW 1552 test unit) so I had all
the
> injectors cleaned, injector filters replaced and also replaced the fuel
> filter. After that the car suddenly has a cold start problem.
> The engine only turns on when I press the accelerator a bit. Even with a
> cold start the rpm is immediately at about 850rpm instead of the normal
> 1000+ rpm. Warm starts are ok.

Not familiar enough with the detail - in general, I'd be looking for a dodgy
connection on a cold start injector. Don't have a manual for the TT.

> 2)
> When driving the car holds back a bit between 4000 and 4800 rpm. After
that
> it seems like normal. However, boost pressure is down about 0,1 bar and
the
> car feels slower than before. When I unplug the sensor immediately after
the
> air filter (air mass sensor ?, don't know the english word) the car runs
> fine again at full throttle and feels faster than with the sensor
connected.

Do you still have the standard Divertor Valve and, if so, is it original?

The problem affects all 1.8Ts in VAG, but generally shows up in the TT 225
first (probably the extra engine mods pulling it out of the design safety
factor. It's apparently been fixed now (and should be covered under
warrenty), but aftermarket items are available that are a little more..
substantial.. than the Bosch items.

HTH

Hairy One Kenobi

Disclaimer: the opinions expressed in this opinion do not necessarily
reflect the opinions of the highly-opinionated person expressing the opinion
in the first place. So there!