Volvo 480 B18FT rough idling.
Posted: Fri Jul 22, 2022 3:31 pm
Hello Everyone,
I've recently become an owner of Volvo 480 and trying to revive it . I've tried looking in forum for someone with similar problems without luck.
I'm having trouble with rough idling. Engine is B18FT (1989). Previously the car was not starting at all, but after fixing the fuel issues it starts but idles very rough, sometimes even stalls. I was trying to follow troubleshooting from the heynes manual and got to ECU testing Followed the option for EZ210K as I understood from the manual that FT version should have it.
Most of the values are wrong. For example Voltage at ECU pin, 5 instead of 12.6V is 0.126V. Step 10 instead of 220ohm it's 46ohm, pedal position readings are also random. I gave up after this.
For ground, I'm using a screw on chassis. Maybe I should use one of ECU wires?
In the 2nd photo you can see some strange wire configurations which I don't believe is from the factory. Black wire splits into 2 and one side is connected to pin 5 other to pin 20 (if I remember correctly).
I've also replaced the idling valve.
Anyone got any idea if I'm doing it wrong or if pretty much all sensors are messed up?
PS: I've also replaced the idling valve, and spark plug wiring harness.
https://imgur.com/a/HPMpA3i
I've recently become an owner of Volvo 480 and trying to revive it . I've tried looking in forum for someone with similar problems without luck.
I'm having trouble with rough idling. Engine is B18FT (1989). Previously the car was not starting at all, but after fixing the fuel issues it starts but idles very rough, sometimes even stalls. I was trying to follow troubleshooting from the heynes manual and got to ECU testing Followed the option for EZ210K as I understood from the manual that FT version should have it.
Most of the values are wrong. For example Voltage at ECU pin, 5 instead of 12.6V is 0.126V. Step 10 instead of 220ohm it's 46ohm, pedal position readings are also random. I gave up after this.
For ground, I'm using a screw on chassis. Maybe I should use one of ECU wires?
In the 2nd photo you can see some strange wire configurations which I don't believe is from the factory. Black wire splits into 2 and one side is connected to pin 5 other to pin 20 (if I remember correctly).
I've also replaced the idling valve.
Anyone got any idea if I'm doing it wrong or if pretty much all sensors are messed up?
PS: I've also replaced the idling valve, and spark plug wiring harness.
https://imgur.com/a/HPMpA3i