Quote:
Originally Posted by notes928
Thanks for all the replies.
Its a non-us car. I have noticed that the electric fan does not seem to kick in - but the car has not been overheating at all.
Danglerb, what is WOT and what checks can i perform on the Throttle Position Switch.
It only runs bad after a good 10 minutes at idle or in hot wheather so im assuming it has to do with heat soak or hot air going in to the intake.
With vacuum leaks, do they tend to get worse in hot conditions?
What does the Temp sensor do and how can it create rough running?
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By non US, you mean its never been imported to the US, so its a natural Euro living in Europe?
The mechanical fan should keep it cool, the aux fan in the front is for AC and to prevent overheating if the mechanical fan clutch fails.
WOT is how you drive a Porsche, wide open throttle, accelerator to the floor.
More than one thing happens as it warms up, fuel enrichment gets turned off, and some smog related vacuum circuits become active.
There are two temperature sensors in the front on the top of the coolant bridge, another sensor in the bottom of the air filter box, and the temperature vacuum control I mentioned on the right side head near the MAF. Like the throttle switch all of these need to be checked with a meter, but I don't remember the exact details of how to do it, or what to look for.
************* Maybe skip a bit of that for now.
Let the car warm up, drive it a bit, and allow it to run rough for a few minutes, then shut it off and let it cool down, then pull the spark plugs one at time and look at the color of the insulator near the tip as well as the condition of the tip. Post some pictures if its not a nice light tan color. Dark mean rich, and white means lean, and either means that maybe what you need to start with is the mixture setting adjusted.