this would be because of the AWS(Accelerated Warmup System) you could use a couple methods, the first gear method listed in the FAQ, or you could just disconnect the AWS(this will cause the check engine light to come on) you can unplug this on the bottom drivers side of the radiator I believe... I had a picture but can't seem to find it now

 

Disconnecting the switch at the bottom of the rad is a better solution. That thermoswitch's only purpose in life is to activate the AWS.

 

the switch doesnt have anything to do with the temp gauge? and can u show a pic of where it's located?

 

The water temp switch at the bottom of the radiator will effect the Relief solenoids operation, no ifs ands or buts.

And once again the puzzler of the day: The water temp switch is and OPEN circuit when the water is cold. So, now YOU tell me how disconnecting an OPEN circuit will effect the operation of ANYTHING. Temp switch when warm closes a circuit i.e. puts a ground on pin 1H of the ECU.

The water temp switch at the bottom of the radiator is ONLY on series four models.....and they don't have and engine check light of any sort....so the obvious question arises arises about the first post on this thread.

 

unplugging the ASW solenoid valve's electrical connector will disable the ASW system. it will not hurt anything, the ONLY purpose of it is to warm up the catalytic convertors(sp?) so they are emmissions legal and produce less polution gases... but it is not exactly good for your car... as your not supposed to rev a cold car high, you may want to unplug it untill you have to get your emmissions crap done. there is no switch, its an acctual plug/wire... I had a picture, when I find it again I'll post it so you can all see it

you can also buy block off plates that will stop this as well

might be of interest to some of you http://www.idahorotary.com/idle.htm

 

***** unplugging the ASW solenoid valve's electrical connector will disable the ASW
system. it will not hurt anything,***

Nay, nay says I. The AWS, really the Air Bypass Solenoid Valve when talking about a series four assists the BAC during cold startup. Removing the valve or taking its plug off will result in lower rpms than the normal approx 3000 rpm. With the Air Bypass Solenoid disconnected the rpm WILL be around 2200-2300 rpm.

AWS is a foriegn term used by series five people.

See section 4A of the 87FSM for component description.

OOOps. Sovo has a series five 1991 car. Oh well.

EDIT: SOVO won't find a water temp switch at the bottom of his radiator since it's a series five.

 

first off, its soyo not sovo and second, there is no water temp switch at the bottom of S5's, its a plug... man I wish I could find the freaking picture, it'd be so much easier... but it doesn't hurt anything on the S4 or S5 to dissable it, the ONLY reason the car goes to 3k rpms at startup is to warm up the cat. conv. and as you can imagine, it is not good for a cold engine to immediately rev to 3000rpms everytime you start it, sure it isn't killing the engine, but lets just say, its not good for it.... if its not good then why let it happen?

 

Sorry, I forgot to include that the connector to the switch needs to be shorted.