I hope some of you could shed some light on this strange situation.
My car, being a 1994 model is fitted with a Guard Alarm I alarm system (the one with the LEDs and button on the drivers A pillar). Normaly I'm able to activate/deactivate the system 50 mts away from the car. Sometimes it happens that I need to place the remote on the front windshield and as close as possible to the LED indicators for it to work. When this happens, and this is my dilema, the engine runs very rough, at idle it puffs black smoke from the exhaust and fuel comsumption goes uphill. As soon as I'm able to act./deact. the alarm normally, the engine runs sweet as always. I've got no control over this, it comes and goes away by itself.
This is the third time it hapens on the last month, and I can't find any relation between these two issues. It lasts for a day or two and them it goes away. I'm suspecting from any loose common ground, but where...
Hope to hear from you.
Best regards
Rui Amaro
1994 855 T5
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