PorscheZen

The idle is not constant; rolls btw 500 - 900rpm. When I come to a stop, sometimes its as if the car is going to stall but catches itself which can cause me to stall it much easier than b4 the tune-up.
After the car is warmer, seems to even out but it's not consistent.

Any clues?

Red rooster

What was the tune up ? Plugs and filters ?

Geoff

adwriter

I'd start by checking the connections in the ignition system, particularly around the primary and secondary coils.

wsybert

I'd look at vacuum line too.

Richard Curtis

Try the simple things first: Clean the Idle Air Control (IAC) valve using spray carb cleaner (a 10-minute job). Also, try a DME reset (disconnect battery for ~20 minutes, then reconnect and take it for a spirited drive).

PorscheZen

Thanks all.
Tune up was plugs/filter.
I will be checking tomorrow - will give update.
Richard,
Where is the IAC valve?
I'm liking this forum...

wsybert

It is on top of the intake assembly.
See pic, it is circled in red.
Unplug the connector, and hoses. Loosen the clamp and take it out.
Use some carb cleaner, and librally spray the area that the hoses were attached to (inside).
Let it dry off, and re-install. I added a very small dab of light oil to the rotating part inside.

Pingo

Sounds to me like it could be oil overfill. My car had the same symptoms so I cleaned the MAF and the ISV.

After cleaning the car idled perfect