Hello!,

i have the following problem with my car, when starting it on the mornings, the engine doesn't have a stable idle, rather the rpms go down to a crawl making the engine vibrate like hell, then it'll rev up to like 1500 rpms and go down again and at the end the engine will shut down. when i start it up again, the engine works well.

I have noticed the following. on cold starts when the engine begins to show the strange behavior, if i slightly accelerate, the rpms go down then slowly up again, and will work fine from that moment on. this only happens on the mornings.

I changed the coolant temp sensor since i read somewhere that the one i had (black) was probably faulty and could cause crappy cold starts.

I have checked it for DTC's and the only code i see is from an apparently defective o2 sensor. which will be changed soon.

any help is appreciated

help plz :(