1989 Saab 9000 4 cyl Two Wheel Drive Manual 200000 miles
I have a Saab 9000i (1989). I found an interesting sign, the engine works normally, but the check engine lights sometimes. When the engine is running without accelerator, the " check engine" sign flashes four times, then goes off for 1 second, then flashes more four times, etc. When I'm pushing the accelerator, the lamp lights permanently. This sign goes off simetimes.
I know, my car doesn't give fail codes by flashing, therefore I couldn't get information for this sign.
What I check?