Engine vibrating at idle
 

Hi guys

I have an STI v3 and particularly when cold the car tends to have a slight vibration/judder on idle. This can be felt through the car when sitting at lights.
Car honestly drives great and is defo worst when cold.

Here are my findings so far

*The revs remain constant on idle - no major fluctuations
*The car has all the power expected - keeps up with my brothers 335i and 335d on spirited runs
*No smoke out of exhaust to be concerned out
*Spark plugs changed and properly gapped recently
*Timing belt changed before I got car (car has always idled this way since I got it)
*No engine management light or codes being displayed
* I will double check but does not happen every time the car is started


Any ideas on what I should target first as "quick wins"? Was thinking of replacing HT leads as they looks old - is there a way to test for faulty HT leads?

exhaust hangers ? It might be bouncing about just.

Old spray bottle from under the sink, fill full of water and in the dark spray HT leads etc. If you do change them oem is the best but sort of expensive.

Sparks ;)

My v3 sti had the same symptoms, predominantly a lumpy idle when hot or cold. This was even after a new short block had been fitted!

I have just replaced my lambda/o2 sensor and it has removed these symptoms completely, the car also doesn't fall flat on it's face between gears any more! The sensor was approx £200 from subaru.
https://cimg8.ibsrv.net/gimg/www.sco...c744f2ca41.jpg

Thanks mate, will consider this if required

Thanks guys, weird thing is I had no engine management light come on at all. Did you guys have an engine management light come on?

What is easiest way to read codes on a 1997 v3 sti ?
This ? http://www.scoobypedia.co.uk/index.p...eadingECUCodes
Thanks

top man thanks!

Yes I had a check engine light after about 12 months of ownership but it had done the vibrating thing from the start. code 32 for me too once the CEL started appearing