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Some ideas... (archive)
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Posted by Mihajlo on April 30, 2002 at 16:34:03:

In Reply to: Occasional rough idle at start. Any ideas? posted by Mike on April 30, 2002 at 16:18:55:

Had the similar thing since I bought it @ 180000Km, 2 months ago. Put the injector cleaner in for the first time on Saturday, no cold-engine rough idle since.

The 'trick' for the injector cleaner - add it to almost empty tank, drive for a couple of Km, fill up another 10l, drive till it's almost finished, then fill up at will.

===Never EVER drive on near empty tank===
All the dense/heavy 'mud' from the botom of the reservoir will make it's way into the fuel system.

Other ideas:
- When was your last service (mixture, O-sensors)
- How are your plug leads doing? See if can spray some water mist over the leads while the engine is running - if it changes the 'tone', you know your leads have lost the insulation properties.
- Is the engine oil getting too thin? Takes time to build up the normal presurre in the cyl. head - can you hear the valves running dry?

All the best,
Mihajlo
South Africa
'97 740 4.4 Steptronic

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