Idle Issue

[e30_driver]

my 316 keeps idling at about 1200rpm then every 5 seconds or so it drops down to about 400rpm and nearly stalls then returns to 1200rpm. Any ideas on what this could be guys?

[Grrrmachine]

316, or 316i? Biiiiiig difference...

[e30_driver]

if the i just stands for injection then yes, i

[Grrrmachine]

Ah, in that case I'd look for issues on the Intake side of things to start with:

http://www.e30zone.net/e30zonewiki/inde ... ake#Idling

[e30_driver]

Cheers, will have a fiddle tomorrow =]

[Grrrmachine]

No problem. Go through the list of things mentioned in the link systematically, and shout back if you still have troubles

[e30_driver]

will do

[Billwill]

Main things on the M40 to check are: Blue sensor, air-leaks anywhere, TPS under the Throttle Body must "click" as throttle is relaxed and the ICV needs to be cleaned out.
Basically I am just summarising what the Wiki link has to say.