Top 20 1991 Volvo 940 - Page 4 Questions & Answers

If you can pull the knob off the heat and look inside to see if the knob is broken out. if not you may have a broken switch.

Steering will be locked ,best you go visit a lock smith.

Dirty Idle air control motor, throttle body, and air filter.

Should be a place on the engine mount bracket for 1 end and attach the other end to the longest screw of the 4 that go thru the alternator to hold it together.

Any one of the mounting bolts is ground. The whole engine block is ground but I would lean towards one of the alternator mounting bolts.

you will have to take that to a profesional

Vacuum leak in the fuel system, and/or evaporation system leak.

remove the metal trim do that with a flat screwdriver .push in into the slot to each side of the metal trim. strong spring you are pushing against.do this only to one side and lift off.you will need a hex set to remove each screw. if your dash is fitted with a turbo gauge . remove the kick plate in the drivers foot well .look for a small rubber hose .10 inches from the gauge is a joiner pull the hose apart only at that point.now back to your dash .remove the springs 4 of them. then lift out the dash you can change the bulbs when you reach in twist and remove.

Sounds like low oil pressure, there should be a check ball valve in the pump it may be stuck in the open position or the spring that holds it may be weak. Try 20/50 Castrol GTX and a quart of slick 50 with a new oil filter. If it still makes noise when cold it will be time for an engine rebuild in the near future.

Heater core is cracked. Turn off heater and keep checking coolant reserve tank level.

These ones were weird. The button sometimes had to be pushed IN to turn on the A/C and sometimes in the OUT position for it to be on. The manual (accessible on volvocars.com website) will tell you which one you have. If you don't get cold air, you should listed for the loud click under the hood of the A/C compressor starting and stopping. If you don't hear that, it's very likely that you don't have enough R134a refrigerant in the system. Sometimes a recharge is all you need, and sometimes you have a bad leak and need a system repair. Listening for that click is key, and if you don't hear it, check the charge level at the nipple under the h

Too low octane fuel?

The crank angle sensor is located on the top of the transmission bellhousing, mounting bolt is a 10mm bolt, bottom left side (if you are looking at the engine with the intake on the right) and is very hard to see. CAUTION: Do not apply much force on removal or installation of the sensor bolt as its bracket is very fragile. If the bracket gets distorted it could cause a no-start condition as the AC sine is too weak to be detected by the ignition computer. Also, work on the system powered down. Remove that battery negative cable!

Rockauto.com should ship internationally.

If the speedometer and odometer are not working the problem is usually lack of signal from the transmission speed sensor.But if the cruise control works and the speedometer does not, my guess would be a problem inside the cluster.

Duplicate question.

Sounds like the fuel filter is dirty... When have you replaced it last? Possible that the pump is bad but I would start with the filter.

1. maybe The fuel pump controller failed.

No, no power at fuse 4 means that the relay is left unpowered so it no longer works even if it's perfectly fine. And that relay is triggered only when a bulb is worn out so if the bulbs and the entire circuit including the grounds are good it can't be it.
You will need to remove the fuse holder and find out why the fuse isn't powered.

have you checked your oil if it looks like gravey on the dip stick or the oil fill cap could be a blown head gasket stick something under the car to show a leak like cat litter park over top of it and see if you have a leak over night dont try this if its going to rain of course