High idle and running rough

[Adam-Gt-]

So yesterday I got my self a GT advance on test drive all was fine started to make my way home and notice that when I put foot down it would splutter and miss fire

Also the temp gauge would go up and then settle back down and sit half way like normal it idles very high when it's warm first start it idles around 1200rpm then once warm gets up to 1500ish rpm

Any ideas I'm thinking temp coolant sensor maybe at fault engine light doesn't come on at all either

[5e colin]

theres an issue there with your temp gauge going up !!! if the temp sensor was fucked she be rich as fuck !! whats your afr readings ??

the idle isseu is probly iacv or wax stat

[Adam-Gt-]

Unsure on afr as got no way of reading them

Idle issue is strange as on cold starts it sits at normally 1200rpm which you would expect as auto choke would be on but then gets higher as its warm

[patman]

Ads, Colin's your man to help you here, also I live near ads colin so can always lend a helping hand too 👍🏻

[5e colin]

Unsure on afr as got no way of reading them

Idle issue is strange as on cold starts it sits at normally 1200rpm which you would expect as auto choke would be on but then gets higher as its warm

thats probly your tb heating up do you have a sticky butterfly ? test the wax valve and the iacv and get back

[Adam-Gt-]

thats probly your tb heating up do you have a sticky butterfly ? test the wax valve and the iacv and get back

I'll test it tonight when I get home and let you know

[Adam-Gt-]

Turned out to be wax stat , I've got a spare one but unsure if it's any good how do I tell without swapping them over ?

[Adam-Gt-]

Maybe it's not then used another throttle body that I know works and still the same

I've changed , throttle body for know working one coolant temp sensor and iacv ! It's has come down slightly but still sits around 1200rpm has searched for vac leaks can't find anything

Edited June 25, 2016 by Adam-Gt-

[Adam-Gt-]

I'm still no further with this !! Found out it had no thermostat in so put one of those in also I notice a bad leak on the manifold as a stud was missing on the head would this cause it ?

[patman]

It's a leak mate but someone will definitely know the answer to that

[Adam-Gt-]

Now sorted !!

[Bug679]

What was the problem ? Might help someone else out in the future 🤔

[Adam-Gt-]

The coolant hose from the cold start valve to the thermostat housing was blocked so no coolant was running through it to warm it up