Thread: cold and hot start issues

hello.
i have recently purchased a mk2 ford escort with a sr20. i have owned worked escorts all my life but never anything with nissan power. i have not had anything to do with sr20's either.

its basically a stock engine (so ive been told) with a garret gt28rs turbo and a haltech f9 ecu.


the problem is. when its cold it will crank but not start. if you disconnect the hose (red arrow) and squirt some fuel in with a syringe it will start. it wont idle untill it warms up a bit. then it runs and idles fine. once hot if you try to start the motor it, again, will crank but not fire. remove the coolant temp sensor connector ( circled in green) and it will fire up.

my thinking was that the sensor was faulty and the ecu was going into safe mode and cranking the mixture up rich. i removed the sensor and the resistance seems fine.
thats as far as ive gone so far, just wondering if anyone could help,

cheers

was there anything found on this ?

Did u check the basics? Distributor cap, rotor, plugs....etc?

sounds like an idle air control valve issue, will it start if you give it some gas?

Even if that sensor was faulty I am almost 100% certain the car would still start. My sensor plug for that is broken and it slipped off for a while and I never had issues starting or driving it just ran rich.