1997 Volvo 850. Car shakes when put into reverse

Check sensors for aircon as this share the 5 V supply for the throttlebody sensor

Gears slipping ****** might starting to go

Sounds like a battery problem. Make sure that all your lights are off inside the car. Check your visor light too. Ive seen broken visors that wont turn the bulb off when shut and drain the battery over night.


Get your battery tested also to make sure it can hold the cranking amps needed for starting.

Check yr Fuel Pressure Regulator.

We referenced the manual.

Hi!

Sounds to me like the engine in fact is getting gas when idleing, but not getting enough air. Therefore my 2 cents are on you IACV (Idle Air Controller Valve). It's a small steel cylinder suspended in a rubber piece on the front of your throttle body, and its job is to supply the engine with air when idleing. This is a necessity since the throttle body valve is closed when the gas pedal isn't pressed. Take out the IACV and clean it thoroughly, also make sure that the air going from it is not hindered by any gunk or deposits on its way to the intake manifold.
(You could have someone hold their hand on the IACV when you take your foot of the gas pedal. If nothing happens it's probably dead or stuck. If something does happen there is still a chance that the air is hindered somewhere).

Good luck, let us know if this didn't help!

Check out this site. You will have to register as a Volvo owner, but you should be able to access the original manual. If you have trouble finding it, let me know, I'll try to help find another source.

Sounds like your vacuum assist brakes diaghram has sprung a leak. Pull the hose to the assist and plug it with a bolt or something. Then try it.

I HAVE A 1997 VOLVO 850 IT WAS RUNNING HOT FOR 2 DAYS AND NOW IT WNT START AT ALL COULD THIS BE MY THERMOSTAT

you will have to have the car diagnosed with a code reader most garages have them prices from £20-90 to diagnose the fault + parts.