UK-POLOS.NET - THE VW Polo Forum

You want to spray carb cleaner down that 'hole' (blue arrows).

Is this done with the engine running or.. ?

Mint wrote:Is this done with the engine running or.. ?

Nah, keep the engine off while you spray down the throttle body.

You'll need to place something on the acellarator pedal (brick, anvil, small child) so that it keep the butterfly plate inside the throttle body open (you'll see what i'm talking about when you remove the airbox and look down into the throttle body.

Once you've sprayed a fair bit of carb cleaner into the TB and used a very clean cloth to remove the black deposits from around the butterfly plate - refit your airbox/filter and start the car up. It probably won't start first time because of all the carb cleaner in the system, but after a couple of tries it should fire up and produce a bit of smoke, go for a quick drive and see if things have improved.

If things still havent improved repeat the whole process again, if your still having problems its time to investigate other possible issues.

what carb cleaner did you people use? and where did you get it from?

Cost £3.99 from a tiny local autoshop, you should be able to something similair to that from any local car care store.

Few weeks ago i was having similars problems, car cut out n battery light came on and it was always in first gear when it happened. Anyway seems to be fine again tho! very helpful post, think ill have a go cleaning mine tomorrow if its not too cold!

Just done this on my car.

Again mine was filthy (and now so are my hands lol)

once done, start up, thick cloud of smoke and idling at around 1000 rpm rather than 800.

Throttle response does seem miles better too.

sorted

O.k. Mine had exactly the same prob, every time you stopped or dipped the clutch, the engine would die, idle was around 850 rpm but hunting slightly. Bought carb cleaner and followed all the suggestions on this site, BOOOOOOM!!!! went my throttle body, seriously though, my revs increased to 2000+ and hunting like mad. Followed all the suggestions about resetting the ECU ie, leaving the battery disconnected for 20 mins etc, no difference. Tiook it to my local garage and got them to plug the machine in, the car recognised it was over-revving and kept displaying error messages, every time he cleared the messages, they just kept re-occuring, result=phucked throttle body, soooooooo, off to euro car parts and ordered a new one for £199. When I got home, I decided to have a butchers at the throttle body, I wanted to find out exactly what effect it had on the engine, so, took off the cleaner and started to have a look. Car was revving away like mad, until, I disconnected the lead on top of the throttle body, revs went straight down to 8-900, with a smooth tickover, however, there is a slight delay in pickup, ie, when you blip the accelerator and while driving the car, accelerator is very jerky. This is a temporary fix for my problem until new body arrives, may not work for everyone, but worth a go.

the only other thing that changed with mine, is that when you let go of the accelerator and dip the clutch it takes a short while for the revs to drop - slower to drop than before.





mind you this morning on the way to work it sounds like i might have developed a mis fire duh random struggling at low revs, un even power at low revs. bah

Aaaaaah!, do you ever get to the point where you think "why the phuck did I get a polo?". O.k., went to Eurocarparts, picked up my shiny new throttle body, took it home, fitted it and guess what, NO FRIGGIN DIFFERENCE, still racing away around 2000+ rpm. However, I decided to play, I disconnected the lead on top (to the potentiometer i believe) and guess what, it now idle's around 8/900 rpm. The throttle response is a bit wafty, when you blip the accelerator, there is a bit of a delay when it picks up. When driving on the road, the acceleration is very choppy, especially around 2000 rpm, it's a bit on the lumpy side as well. HHHHEEELLLLPPPP, please!!!!!!!

and your ignition leads/spark plugs/distrobuter/rotary arm thing are ok?

Tried that, found the dizzy was burnt out, so replaced, plugs and leads all new.

same problem, had a new "second hand" throttle body, cleaned it all out with carb cleaner, had it set up on the computer. Still cutting out. Changed the temp sender, still cutting out. Also changed my lambda sender. ha.. i'm struggeling. also tried disconnected my battery. Next step is to try my dizzy cap and rotar arm, plugs and leads.

haha, I still can't solve my problem on my 1.0 and I have done alot!

Cleaned throttle body
New clutch
New oil
New Sparks
New filter, all of them except petrol
New Distributor cap
New Rotot arm
New HT Cables
New Starter
Changed Battery
New whack with a hammer on the engine

Still stalls idling for no reason, but when its raining all hell goes loose, engine starts jumping around, stalling, huge power loss. It's like wate goes somewhere and i'm not sure where

Went through a car wash stalled it dead, limped out on the starter, sat like a prat for 10min trying to start up, tried running engine at home and spraying it with a hose, nothing happened... Whats left to check are:

Manifold incase cracked
The drainage holes
Change lambda
Change temp sensor
Change idle control valve

Tried vag-com, no errors... But I have come to a conclusion, if the last few last repairs I plan, do not work I am burning it. Either that or I have a gremlin in the engine problem

Yet the 1.4 runs like a charm with none of the issues

Mines also a 1.0L. the other day after having my throttle body set up and changing my lambda, it stalled on the odd occasion and then after that it ran pretty smooth for two days and now its back to stalling. i can't quite put my finger on it. Its a real pain in the a**.

vw-po-low wrote:Mines also a 1.0L. the other day after having my throttle body set up and changing my lambda, it stalled on the odd occasion and then after that it ran pretty smooth for two days and now its back to stalling. i can't quite put my finger on it. Its a real pain in the a**.

Yea your telling me, I thought it was water getting stuck somewhere due to hell breaking loose when its raining, but when I had it running and spraying with a hose nothing was happening, so that rules the water idea out. What else it can be I do no know. Mind you when I did an oil and spark change my revs popped up abit for about a month and things went alot more stable, then it all went down hill. Can't put my finger on it either.

The additional major difference I noticed between the 1.4 and the 1.0 is that the 1.0 has additional crap, such as a vacuum hose and an oxygen hose attached to the air box, maybe there the problems where they are telling the ECU lies and its pissing us about? Otherwise I am seriously running out of ideas on repairs and in a way if I do the additional repairs and they don't work I'll be pretty pissed.