The car: 1995 850 Turbo wagon, Auto transmission, over 200,000 miles.
The problem: Up until 6 weeks ago the car ran great.
Then while driving, the rpm's started to drop and eventually the car would stall, it felt like I was running out of gas. But it would re-start normally every time and then the cycle would repeat itself, each time restarting normally, only to stall again in 30 seconds or sometimes it will run normally for a few minutes or even longer.
The important thing to remember is that the stalling in completely random.
Things the Volvo shop,(not the dealer) has done:
Ran obc ll scan, no codes.
Checked fuel pump, ok, the pump is only 2 years old.
Replaced plugs, fixed vacuum leak.
Replaced worn turbo hoses.
Each time they did something they were convinced that the problem was fixed, but it was not.
Things I have done:
Through a previous post several people recommended that I replace the fuel pump relay. I had access to a S70, 1998, so I swapped the fuel pump relay from that car, and like a miracle the car ran fine, I drove it for about half an hour with no problem.
I was convinced the car was fixed. But next day the stalling started up again.
Cleaned the MAF sensor.
Removed and cleaned the idle air control valve.
Bought new fuel pump relay.
I am at this point at a total as to what to do, I really don't want to sink more money into this car, but I have the feeling that the fix to this problem is something very simple and obvious.
Any thoughts?