1997 1.4 polo idle problem

ncs wrote:

The trottle body may need cleaning, and if it's one of those motorised
ones, re-aligning with VAG-COM. Your first step should be to get the
fault codes read though. Does it run ok when warm and start OK?

Starts first turn but hunts and cuts out until warm

ncs wrote:

Has the battery been flat or disconnected?

Like I said, your first step should be to get the codes read. If an
alignment is needed, you need the same equipment as for a code read-
VAG-COM or a dealer computer.

It could be a coolant temp sensor, or it could just be the alignment- I
don't know if a 1997 car has a motorised throttle body, but the
Ross-Tech page suggests it might.

More info:

http://wiki.ross-tech.com/index.php/Throttle_Body_Alignment_ (TBA)

ncs wrote:

I had one doing this, I changed the crank sensor and that fixed it. YMMV.
It also needed a second lambda sensor, but I didn't bother with that.

Have cleaned throttle body and now engine starts first turn and idles when
cold but will not idle when warm - any ideas anyone ?

Am selling the car so don't want to spend much money fixing it

ncs wrote:

have a check for air leaks, use a stick to hold the throttle open enough to
keep it running, use some carb cleaner spray to spray over all the inlet
system, if you get any changes in engine speed there is a leak.  other
likely culprits for the problem are faulty coolant temp sender, faulty egr
valve or idle valve

Nedavno Mrcheerful napisa:


I've seen this advice quite a few times, I tried that when I was trying
to fix my Audi. How noticeable is engine speed change?    +/- 50rpm? Or
100rpm? Not that I was looking at the dash, but I could not notice any
change.



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Yvan wrote:

you will hear the change, depends on how bad the leak is as to how many rpm
goes up.  if the leak is only on one cylinder you will hear it run better,
etc.  A digital tachometer will show it up nicely, a needle one maybe not.

Nedavno Mrcheerful napisa:


OK, thanks. I'll need to get one digital tachometer... Or perhaps I'll
find schematics on the Internet, and go DIY way...


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     /__/  /    \      ** Registrovani korisnik Linuksa #291606 **
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