fan coming on too late / idle speed and shaking

[teddygazi]

My 94 Jetta III fan is coming on at about 200 degrees. The engine feels real hot. I had it flushed and put a new coolant fan switch. I feel it should come on sooner. The temp used to hover around the mid point , butit now goes to 20 then back in traffic. I live in Calgary Ca. It's cold and the engine should stay pretty cool.

My Jetta also shakes a lot. It will do this after about 5 minutes of being started.The RPM are at about 6000. It almost feels like it is going to shut down. I have changed plugs, wires, rotor and cap. It has not helped

[nessa8223]

The shaking sounds like you need to have your timing adjusted ir you need to replace the throttle position sensor (TPS). That is fairly cheap to get done at a shop. The fan issue sounds like you need a new thermostat. Again very cheap (under $10 at a parts store), and you can do it yourself.

[Doug Tatham]

It sounds to me like your idle stabilizer is dirty. This is a very common problem. The idle drops too low and the engine shakes. If I remember right the RPM should be around 800. The idle stabilizer can be cleaned with carborator cleaner spray. As far as the temp is concerned, check the spec. I think 200 sounds about right. The fan is controlled by a sensor on the radiator.