Im having some cold starting issues with my 95 2500 5.7. When the ambient temp is low roughly 20 f or lower it has to run for roughly 3-5 minutes before it will go into high idle. Every other EFI engine Ive had when you start it when its cold it will idle around 1200ish rpm. This one runs about 800 rpm then picks up to around 1200 after 3-5 mon. Also when first starting it before it idles up its idles like a high horse power drag car. It is very rough. Once in high idle it runs smooth. I have checked plugs and all seem ok. Cap and rotor are in good shape and show no signs of carbon build up on the contacts and i don't see any cracks. Wires look ok. It has roughly 4-5000 on tune up.
What all does the ECT sensor control. I know it sends a temp signal to the ecm for timing adjusments, how much fuel to add. Does it also control when the engine goes into and comes out of high idle? Also I cannot read that sensors reading with a scanner. I don't know if its a none readable sensor on obd1 or not. I had to replace it when I did my intake gaskets due to breaking it when i was torqueing the bolt by in down. I had to replace it with a cheap parts store brand and now for the life of me cannot remember if it idled correctly before i replaced it. Any one have a idea if it could cause any of the problems im having?
What all does the ECT sensor control. I know it sends a temp signal to the ecm for timing adjusments, how much fuel to add. Does it also control when the engine goes into and comes out of high idle? Also I cannot read that sensors reading with a scanner. I don't know if its a none readable sensor on obd1 or not. I had to replace it when I did my intake gaskets due to breaking it when i was torqueing the bolt by in down. I had to replace it with a cheap parts store brand and now for the life of me cannot remember if it idled correctly before i replaced it. Any one have a idea if it could cause any of the problems im having?