starting problems 93/bonneville

I have 93' bonneville. Runs real good when it runs. Doesn't want to start in cold weather. Had it brought to mechanics and they replace the ignition switch along with the computer system. Is not giving any codes under an engine diagnostic. It turns over fine it just wont fire in cold weather. The car starts to flood itself when it wont fire right away. As soon as outside temperature gets above 35-40 car starts fine. I'm thinking it's a mass air sensor or a fuel injection problem. please advise I'm lost.

unplug your coolant temp sensor and see if it starts right up. also, how are your sparkplugs and aircleaner filter? toivo

I have 93' bonneville. Runs real good when it runs. Doesn't want to start in cold weather. Had it brought to mechanics and they replace the ignition switch along with the computer system. Is not giving any codes under an engine diagnostic. It turns over fine it just wont fire in cold weather. The car starts to flood itself when it wont fire right away. As soon as outside temperature gets above 35-40 car starts fine. I'm thinking it's a mass air sensor or a fuel injection problem. please advise I'm lost.

I had the same issue with my '89 many years ago. It wouldn't start when it was very cold outside. Persistent attempts would flood the engine so badly, fuel would end up in my oil. I finally took it in. Replacing the distributor cap / coil pack (all in one these days) did the trick. It just wasn't putting out the necessary voltage on cold days. My Bonne has be great ever since. 386,000 miles and still running great. Hope this helps.