Isuzu Trooper Owners Club UK™

[Leo]

I haven't invested in an owners manual for my '92 Bighorn yet (hoping to get one for Christmas! ), so can anyone tell me exactly what the manual says the button on the lower right-hand side of the steering column is? It has an engine motif on it and lights up blue when pressed - pressing it at idle increases the engine rpm so I'm guessing that it's just a device to warm up the engine a little faster than normal. But, I also have a manual 'choke' for increasing the rpm, so what's the button there for? Any answers gratefully received. Merry Christmas!

[Google]

[steve]

Although I haven't got a manual yet (apart from the Japanese one that came with my Bighorn), I can tell you that it is what you think. It is a sort of engine pre-heat that heats up the engine coolant (now there's a contradiction for you). It should only work at temperatures below 10 degrees C and helps to speed up the internal heating. The revs increase because of the alternator compensation.

Hope that helps.

Steve

PS. I can't take the credit for the answer, I found it in one of these forums some time ago 'cause I had the same query !!

[Jo Sharp]

When i used this button for cold starting during the last couple of days, it caused the engine to lose power and produce heaps of smoke.

This morning left the cold start switch off and everything was fine again - explanation anyone?
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Jo

[mickydrew]

Was just like the ugly bloke with the gun thing and the little "red" button in the movie "The Fifth Element".
I have a 92 3.1TD Citation UK model and luckily the original English manual.
I live in Spain so it never really came into the equation until recently when it was bloomin cold and the button lit up when I pressed it. Not a lot happened and then suddenly the revs went up andaway I went. On return I sitched it back on and it turned it's own little blue light off.
Then for 2 days the bloody Troop had NO power and I though I had blown my turbo? Then by magic it reverted to normal and then started running better than before as it was labouring at 3000rpm and needed to be changed up a gear.
Thanks for the info as now I know A. Where to look for the valve & B. To leave the bloody thing alone....

[Paul Rainbow]

My owners manual for my 1989 2.8Td says that it is the engine quick heater button, & pressing it will heat the engine up very quickly but that I am 'not to be alarmed by the clouds of black smoke and loss of power'! It is not too be left on too long however - which I didn't need telling really!

[Tonyw]

It sounds to me like the QWS or quick warm up system.
Its only supposed to operate below about 6 degrees.
What it does is close two flaps, one in the intake, and one in the exhaust system. it also picks up the idle speed a little.
The idea is to make the engine work harder at idle and lowish rpm to generate more heat, i.e. warm up quicker. It SHOULD turn itself of once the engine is warm, or you demand high rpm.

The main componets are in the intake flap and vacuum actuator on the pipe leading into the intake maifold, and the same again, but with a remote actuator between the exhaust downpipe/catylist and the main silencer.

In warm climates it may never actually come on, so after a few years the flaps, and control mechanisms can get partially siezed, so when you do finally use it the flaps get stuck closed, causing black smoke and a lack of power. hope this helps

Tony

[ethel610]

agree with everyone, we've had same problem and never touch this button now. Have heard it can be disconnected

[ethel610]

agree with everyone, we've had same problem and never touch this button now. Have heard it can be disconnected

[Leo]

Thanks everyone!
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'92 Lotus Bighorn 3.1

[Richard D]

Pulled the swith out and took the wiring plug out of the back of mine then put the swith back in the hole