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Re: engine dies on hot day
I spoke to two mechanics about my engine cutting out on a hot day (30C+).
One of them said it was common problem with 1991 Audi 90 cars, aparently
lack of air flow through the engine bay can cause this. He thiks it's the
vapor lock phenomena.
The other mechanic said he had not heard of a such a problem, and that
it's not a common problem, and since it only happend on a very hot day it
would be hard to troubleshoot.
I am stumped as to what to do.
Last time it happened, I suspected the fuel pump relay and swapped it for
another right on the spot but it did not help even though I heard the
pump working while trying to start the engine.
So far I changed fuel pump and fuel pump relay, but problem still occurs.
When it happens I can heard the pump changing it's sound.
Any thoughts would be appreciated.