warm-up time and rpm / temp

[Col]

well i have a '92 gt2, 87k miles. it's still on the auto-choke pierburg carb. i've just got a few questions with regards to normal warm-up time and temps.

well on a cold start she starts up first crank every time, its pretty impressive really. idle starts at around 1600-1700 then once i start driving it goes up to just over 2k.... pretty annoying in traffic.
it takes 5-10mins for idle to drop to normal 800-ish rpm (when i first got a couple of weeks ago the idle sometimes dropped to a lumpy 500, but it hesnt done that in a while) .... but the temp gauge doesn't really seem to do much, its usually just there sitting on the bottom but sometimes wanders up into the 1st 1/4 of the dial after driving for a fair bit. what could that be all about, faulty sensor / dial or genuinely an over-cooled engine?

is that choke about normal or could i do with a carb rebuild / webber? and whats the crack with the temp?
cheers.

[Funky Diver]

Idle sounds like it's doing what it's supposed to be doing. The lumpy 500 might just have been some crud in the jets. Best to check your fuel filter for rust / crap. If it's present there's a strong chance that your filler neck is knackered and you're collecting rust in your petrol tank.

The temperature needle should (depending on the guage) be hitting around the mid point at the time the choke releases and the idle kicks in. Sounds like you have a faulty sender, which is simple enough to replace and would be a good time to do a coolant flush!! (the sender should be on the bottom of the Radiator if I am not mistaken)

[Col]

thanks for the info. i've had a quick look at the filler neck because i heard its a problem area and couldn't see any corrosion at all. i'll have a proper scout next time i have some time. i've never seen the temp gauge get anywhere near halfway so thats definitely at fault then. will get that sorted.

i think i was put off by the choke because the only time ive ever come across carbs is on motorbikes.... which obviously warm up alot faster. i want a manual choke... but just can't justify getting a webber at the moment :(

[decon]

How is the thermostat in the car.
Might be stuck open which would cause the car to take a long time to warm up properly.
Might be worth a look.
The weber carb makes a big difference. But if your doing it you migt need a new flange for where the carb sits onto the manifold

David

[PeteGLi]

To check your coolant temperature gauge - see here -

http://sciroccoregisterforum.co.uk/faq/ ... ure-gauge/