Good Evening Folks;
I've been away for a while but now I need some help with my daughter's '92 740 Volvo with the Regina engine management system. It has developed a misfire and stalling condition when raining (even a car wash will set it off). This has been going on for the past few weeks and so far I have replaced the plugs, ignition wires, the cap and rotor and the coil. I ran the diagnostics and it says that the main computer is faulty but I cannot see how the wet conditions can set it off as the computer is inside the car. Now, when she fills the tank and adds some ISO gas line anti-freeze the car runs better. That would point to water in the gas, but again why the misfire only when it is wet? I am tearing out whatever hair I have left.
Regards;
Mike Coleman
North Lancaster, Ontario, Canada
1988 Volvo 240 Stationwagon, 310,000 miles RIP,
1988 Volvo 240 Stationwagon, 220,000 (approx)
1992 Volvo 740 Stationwagon, 215,000 miles,
1984 Mercedes 300D, 310,000 miles,
1986 Mercedes 190E 110,000 miles
1986 Mercedes 300SDL, 245,000 miles,
1998 GMC Safari, 445,000 kms
1996 Fleetwood Tioga