Constant Reving Problem

I have a slight problem with the GTE.. :?

When you start her up first thing in the morning, she idles at around 1K revs for a couple mins..but as soon as you take her above 30mph or leave her to run for 5 mins, the revs shoot up to 2.5K/3K (also when slowing down etc)..She stays at 2.5K revs for a while, then will drop all of a sudden to 1K, then shoot back up again after 2/3 seconds..

We are at a loss to think what is causing this..we've had a look at everything we can think of, but has anyone got an idea?

Something that might be relevant - she is always "cold"..i.e. the temperature guage always reads cold (below 1/4), even when she's been given a run..

Any ideas would be appreciated.

could be one of a few things, thermostat stuck open, idle air valve sticking also whaen i had a gsi the timing was advanced too far and it started reving up its self and dropping off again.
like i said its one of a few things, theres a few to start with but i'm sure some people will add to it.

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Originally Posted by david(NOVA-TURBO)

could be one of a few things, thermostat stuck open,

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Originally Posted by david(NOVA-TURBO)

idle air valve sticking

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Originally Posted by david(NOVA-TURBO)

timing

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--^ None of the above..we've had them to bits/tried/tested..unfortunately, none of these made a difference..

But thanks anyway.

Any other ideas?

does it av automatic choke

could b carb pinch 1 from scrappers n tryit

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Originally Posted by dan23

could b carb pinch 1 from scrappers n tryit

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GTE=mpi engine

throttle cable sticking

dodgey temp sensor

dizzy timeing

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Originally Posted by dan23

could b carb pinch 1 from scrappers n tryit

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yeah why don't we all steal stuff and be cool

No sign off an air leak anywhere? If not, cover everything in WD 40 when its not running, move all the linkages etc around and see if anythings sticking, then if anything is, spray it again. Had a problem like that in a Fiesta once, Chucked a heap of Carb cleaner and soaked the engine from the inlet up with WD40 and sorted it. Funny smell for a while but you get that though.

Let me know if you need any bits from the EFi unit or AFM e.t.c

i have basically all of the above (converting 1.6 to carbs) just lying around in the shed. Can post it to you for a minimal cost + it's come of seans old engine so you'l know it's not been ragged :-D