Problem starting in hot weather

I don't know of any Saab specific issues, but it sounds like classic "vapor lock". I thought that was mostly eliminated these days with modern fuel systems but I could be wrong.

A "vapor lock" is cause of most trouble these days. I sent my car to service, but the mechanic said it was "seized" and had a "vapor lock". My computer also "seized" because it had a "vapor lock". I didn't fell well, so I went to my doctor, he told me that my head had "seized" and that I probably suffered a "vapor lock".

Possible temp sensor failure for the ECU and it's trying to do a rich cold start when hot.

Graham

When I had a problem, it took quite some time, but the problem was found to be a failed rear fuel pump. This gives all the symptoms of vapor locking and is hard to diagnose. I've had two rear pump failures over the years on my C900.

Hi,

It sounds like you need a new 'crank case speed censor', I had the same problem as you and this cured it. Saab charged me =A3160.00

regards

It took my car back to my mechanic again. This time he replaced the 'crank case speed sensor' and so far the car is working fine. Since my mechanic was not sure if this repair will fix the problem, he will not charge me anything until I have driven the car for a few weeks without any further problems.

It took my car back to my mechanic again. This time he replaced the 'crank case speed sensor' and so far the car is working fine. Since my mechanic was not sure if this repair will fix the problem, he will not charge me anything until I have driven the car for a few weeks without any further problems.

Stick with that mechanic ! There's few that good.

My local guys aren't bad either. And they always remember me when I drop in - I like that.

Graham

An update. Replacing the sensor fixed the problem.