Something funny happening today

 

When engine cold on startup but foot on accelerator and the revs drop to nearly 0 before coming back and increasing.

 

Nearly caused me to crash this morning on roundabout. Saw gap on roundabout. But the boot down to go. The revs dropped instead of increasing car nearly cut out , and took approx 2 secs to recover.

 

Anyone have this problem before

 

Cheerz

 

Roy

Is that the throttle bodies? Techie guys out there?

Roy, that rings bells with me. I'm sure I've had the problem but can't remember which car it was. I think it may have turned out to be a vacuum leak.

 

Sorry - not much help but maybe a starter for 10 ...

Just a suggestion, but I had a similar problem with my manual NA (so it might be different for a TT). When cold, there'd be no power at low revs (up to about 2500 maybe), and if I put my foot down it would hesitate badly - had *exactly* the same problem at roundabouts.

 

I mentioned it to Nico, and he said my fuel filter looked old, & I should try replacing it before worrying about anything else. That seemed to sort it :)

I've started having a similar problem again now, but it isn't so bad, and it doesn't happen as regularly. I'm thinking it might be the air filters (I don't know when they were last changed), but I'm too technophobic to have a look :/ Are the air filters on the NA the same as for the TT, does anyone know? I know there's an article somewhere on how to change them for the TT, but like I say, I've not looked to see how they compare.

 

Anyway, point is: check your filters, because it might be something that simple.

Few possibilities here. Throttle bodies are a deffinite maybe. Throttle position sensor also may need adjusting. Maybe a dirty MAS (airflow meter).

 

Check the setup of the Throttle position sensor first. If this doesn't cure it check the throttle bodies are clean and in sync with each other. If those are ok, then you may have a dirty MAS. To test this you are best getting a known good one.

 

Failing that you may have an air leak somewhere.

 

HTH

 

CheerZ,

 

Andy

I think its the choke.

 

The Choke will put fuel in to keep it high revs to keep it going especially in these colder days. Lots of petrol goes in to keep it high, cos the normal amount would cause it to stall. You put you foot on the accelerator to pull off and the choke turns off because you would wheel spin at that high revs at least in the wet you would. So the choke is off but the amount of fuel being provided by the position of the accelerator is not enough to keep it running while its cold. Hence the hear stall.

 

You can help this by cleaning out the fuel flow and allow the car to breath better. Start by changing the fuel filter, 2 mins job, change the airfilters, 10 min job (LOL ;)) clean the throttle bodies 20 min job and reset the ECU and the throttle position sensor after you done all this. I think you may be pleasently suprised.

 

My car had irratic idle dipping revs on pulling off, I changed the air filter and fuel filter and reset the ECU and it been 100% better since. I had already dont the throttle bodies a few months before.

 

Really you shouldnt do these small things when the car is starting to feel sloppy. You should clean the throttle bodies once a year at least. Change the air filters when required and fuel filter once a year. The Book says 15,000miles for the fuel filter, I do it less than that.

 

Stuart

 

Stuart.

Thanks guys

 

Have done the throttle bodies couple of months back

 

Air filters 7000 miles ago.

 

I will do the fuel filter and reset the ecu and see what happens

 

Roy

Same thing on mine its an air leak!

How did you find out its an air leak. Where was the air leak??