Need Advice: Engine stalls if not warmed up

[mtech018]

Good day guys, I need your advice. I have an 85' 325 and every morning before I leave my garage, I have to warm up engine for 5 minutes otherwise engine stalls. After 5 minute warm up, engine runs great with no problem at all. After 8 hours at work, before I leave my office I have to warm it up again otherwise it would stall, but after 5 minute warm up car runs great again. What seems to be the problem here ?

Thanks in advance.

[M-technik-3]

Is this a m20b27 or an m20b25? or aka an i engine or eta engine? Lets make sure everyone is on the same page to start with.

[mtech018]

It's a 325e japan version, not sure if its an m20b27 but engine is very similar to a 325e us version

[jlevie]

My first suspicion would be intake leaks.

[mtech018]

Appreciate the reply guys, will check for intake leaks jlevie - could it also be a faulty temp sensor ?

[b*saint]

Does it fast idle?

[mtech018]

it idles normally when you start it in the morning - if you dont warm it up for 5 mins, when you shift to drive... rpm drops then engine dies

[b*saint]

Idles normally as in it doesnt high idle when its cold?

[Jean]

Could be a bad icv, try disconnecting it in the morning and see if it makes it worse.

[mtech018]

Here's an update, culprit were spark plugs and 1 defective socket of the high tension wire - thanks for the valuable inputs.