1983 Volvo 240 DL... Sudden loss of Power.

I would have sworn that the cable screws onto the back of the instrument cluster.

Sudden Loss of Power while driving 65+ on the freeway ' Forums ...

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Tesla Motors Dec 16, 2014 - 31 posts - ‎21 authors
My car is back at the factory getting "worked on"...sudden loss of Power and control while driving on the freeway...has anyone else experienced this? ... My son was driving his '04 Volvo on the highway, when all of the sudden the car started slowing down, despite how much he ... Last I heard they were 60.

Engine Intermittently Loses Power - Avensis Club - Toyota Owner

This sounds like an information sign that lets you know your brake fluid level is low in master resesivoir. At a point were you push the brake pedal and drops the level ane sensor comes on. Sudden stop and go and on turn driving cane do this if level ids low.

Sounds like you need a fuel pump. There is an access panel in the floor of the car to get to the pump.

Just a guess....
Have you checked all the vacuum hoses?

Hi There, You need to check you automatic transmission fluid (ATF) levels which controls your power steering, if it is drained you need to top it up if the container is cracked, you need to change it. Next, your engine needs retuning to stem down the excessive revving.
Cheers,

Go ahead and swap the transmissions, and that should be about it. The b230 and b23 engines are basically the same block, so there should be no trouble there.

This sound like the overdrive relay. try to reset the relay. It looks like this one. I am in no way affiliated with the site my brother had the same problem with his Volvo

No, you are fine. it wont damage the valves.

As for the fuel tank cap and assuming you have lost the key, try some keys that are similar in size. If you have the key and it won't open, you might try some graphite lube in the lock, let it sit a few minutes, then try it. If you lost the key, you might try a filing cabinet key, sometimes those work. A locksmith might be able to pick it for you.

As for losing power, check the wiring to the battery and the fuse from the driver's side fender to the injectors. If the seller washed off the engine, he may have gotten water in that fuse link. Pull the fuse, look for moisture, put some electrical contact lube on the fuse tabs and replace it. The battery cables should be tight and the ground should be tight at the grounding point on the engine block. If that all checks, it could be throttle body needing a cleaning, or a mass air meter needing a change.

If the simple stuff checks out, get a computer diagnosis. Don't waste time on shops that don't know Volvos and make them show you the codes that they get from the computer probe. Been there, done that.