A puzzle

[Braff]

Hi Guys,

When I start my 1.8T from cold it works ok until the secondary pump disengages and the revs drop to 750. it holds the revs for about 10 secs and then begins to bounce between 500 and 1000. Sometimes when I stop the engine stalls.

However, if I accerlerate hard in 2nd or 3rd up to about 6000 rpm, it maintains the 750rpm idle speed for the rest of the day. A puzzling situation. Any Ideas?

[Taxi 219]

Throttle body clean with carb cleaner.

[billy2981]

have you tried a fuel system cleaner?

make a strong mix of one, it might help

you might be having trouble with the injectors, does it feel rough and jumpy when it does it? id try a dose n a half of redex or the wynes, put the wynes in urtank and only half fill ur tank, run it for a while then leave it to soak for a few hours. then go for a drive again. hope it is that simple.

good luck mate

billy

[Braff]

Yes it does feel rough and jumpy. Will try the suggestions and let you guys know what happened. Thanks

[billy2981]

ne worries mate,

when you next start ur car.

put the egnition on and dont start, (all lights on the dash)

listen at the bonnet for a high pitch wine, (its the throttlebody allignment) leave it till it stops,

might help.

good luck

let us know mate

billy

[Braff]

I added the redex to the petrol and the car is idling better but not perfect. I want to clean the throttle body. What is involved and are any specialist equipment required?

Thanks for the advice so far

[martziniuk]

Dirty throttle body usually affects acceleration in the form of hesitations from my experience.

Idle is usually ok due to less air entering throttle body on idle but when on WOT more air passes through throttle body so you notice it. Thats how i see it anyway.

New throttle body gasket,allen key and carb cleaner are required for throttle body cleaning, there is a guide on here somewhere.

[mluton]

Also clean the AIT sensor with the throttle body. 7mm allen key IIRC for throttle body and AIT Sensor.

[Braff]

Cleaned the throttle body and it has made a difference. There was a coating of oil though on the throttle body as well as in the pipe from the intercooler. Is it suppose to be there and if so how does it get in there?

Thanks for the advice guys

[billy2981]

the oil is spose to be there mate

jus wait till you take the cooler off loads runs out got me worried too. it is the buildup or oil vapour from the engine,

[martziniuk]

So would you say its fixed or just better?

[Braff]

Its better. I am planning to check all hoses into the turbo and through to the throttle body as well. I have noticed a small of black smoke out of the exhaust so I will just check there are no leaks in the system.

The advice on here is brilliant. Briskoda saves you money

[billy2981]

black smoke????

sounds like its been remapped. that norm happens when its got a strong map on, if it is grey then id check for oil but black is norm on remapped cars

check you tube for some vids youll see what I meen,

[Braff]

Started the car this morning and idled perfectly and under acceleration, not a hint of smoke. Still going to check the hoses though just to be on the safe side.

Thanks for the advice guys

[billy2981]

glad its sorted now mate,

the car prob wasnt cared for that way in her past life,

have fun mate

bil

[Braff]

Thanks a lot guys.

I can only imagine what a skoda dealership would charge for what I did in less than 30 minutes