Hi, my Saab 900ng turbo convertible 1995 is giving me some struggle: When I switch the engine off, make a 2-10 minutes break, the engine stalls when I try restarting it.
Waiting approximately 2-3 minutes before next start attempt, the engine spins like nothing was wrong. This "feature" is very annoying e.g. if the engine stops in the middle of a crossing or in the gas station queue.
Any suggestions, what could cure this phenomenon?
Best regards Jakob, Denmark
My random guess of what the problem might be: the fuel system. While this isn't likely to resolve the problem, you might start with low priced items, such as replacing the fuel filter if that hasn't been done lately. A leaking fuel injector (causing flooding of the cylinder and depressurization of the fuel system) or a weak fuel pump (less likely because you would likely experience problems driving at high speeds or when you are low on fuel) may also cause they symptoms you describe.
Another component that might be faulty is the sensor that tells the fuel injection system to operate in the "engine warm up" mode. This makes the fuel mixture richer to prevent the engine from stalling as it is warming up to normal operating temperature. Now that I think about it, any of the fuel injection system components could also cause this problem, but then the MIL light (check engine) would illuminate in most cases.
There are many possibilities, so additional testing would be needed.
Walt Kienzle
1991 9000T
"warm start problems" sounds like what you're describing.
Which engine do you have please? Dave Hinz
The B204L engine, I have tried to swap the fuel filter but with no positive result.
The suggestion to examine if the temperature sensor is defect could be the problem, I will look into this.
br Jakob
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