Auto volvo 940 wont start

[pynkphizee]

I love my car, i keep getting told its old and now it appears frozen

I have 2 keys and 2 fobs but i haven't used the fobs for a while because after changing the batteries in one it didn't respond every time and i feared being locked out or using the key to open and the alarm going off or the car being immobilised

Now after i filled my car up last Wednesday, i went to use it on Thursday and although it has a new battery and it turns over it wont catch/turn on, (not sure if that explains it properly)

I wasn't sure if it was the immobiliser, fob, key transponder or the volvo safeguard thing i keep reading about
it wasn't essential that i go out but thought maybe someone on here might be able to point me in the right direction before i try anything, or use the 2nd key set

its a P reg 2.3 turbo petrol 940

[Supraweld]

Crankshaft position sensor or ignition coil. Both are known to fail, both are cheap parts. My money on information supplied so far is crankshaft sensor, mounted at the back of the engine below the distributor on top of the bellhousing. Check the wiring first, if thats ok replace the sensor.

[Supraweld]

The key fobs are crap on these cars. Squeeze the shell together then press the buttons.... little light iluminates yes? When you dont squeeze it the led is intermittent at best yes? This explains the locking issue. Dont worry if the remote fails because if it does, unlock your car with the key then if alarm sounds switch ignition on. This cancels the alarm. Very basic system. It has absolutely nothing to do with your starting issue. See above post.

[pynkphizee]

Originally Posted by Supraweld

Crankshaft position sensor or ignition coil. Both are known to fail, both are cheap parts. My money on information supplied so far is crankshaft sensor, mounted at the back of the engine below the distributor on top of the bellhousing. Check the wiring first, if thats ok replace the sensor.

thank you, I know its cheeky but do you know the part number or a link to where i can order them please

[Laird Scooby]

Originally Posted by pynkphizee

thank you, I know its cheeky but do you know the part number or a link to where i can order them please

https://www.ebay.co.uk/itm/Fuel-Part...y/164082105163

There you go, one CPS link. The coils rarely if ever fail, even at high mileage on these. Have a look at James' thread as well, there are a few pointers to changing the CPS in it :

https://www.volvoforums.org.uk/showthread.php?t=311096

Without testing a few things you'll just be guessing though. Have you got and know how to use a multimeter?

[pynkphizee]

Originally Posted by Laird Scooby

https://www.ebay.co.uk/itm/Fuel-Part...y/164082105163

There you go, one CPS link. The coils rarely if ever fail, even at high mileage on these. Have a look at James' thread as well, there are a few pointers to changing the CPS in it :

https://www.volvoforums.org.uk/showthread.php?t=311096

Without testing a few things you'll just be guessing though. Have you got and know how to use a multimeter?

Thank you so much Dave, I really appreciate it

[pynkphizee]

Originally Posted by Laird Scooby

Without testing a few things you'll just be guessing though. Have you got and know how to use a multimeter?

a friend has one, I will get them to check it for me thank you

[TonyS9]

According to Google p reg is 96, so you should be on guard 2 security. You have 2 separate immobilizers. The alarm system locks out the starter motor, so if the car is remote unlocking and the engine turning over that's working fine.

The other immobiliser is an RFID chip in the key, if this fails the engine should still start briefly but shut down after, it may need a break of 10-15s off before it will start and shut down again.

A spare fuel relay is useful to have but you need to test for failure and not change commonly failing parts, as it's just a wasteful diagnosis approach.

The only other indicator you need after eyes and ears is a light to say that you have power getting to the fuel pump. You can attach this to the connector in the cubby hole at the back by the tank.

To use your ears, check for fuel pump priming when you turn on the ignition. You should hear a quiet whine for about 1s, but it has to be off for about 10s before it will prime again.

Your eyes check ignition is working by slight movement in the rev needle during cranking (and not starting).

[Dirty Rooster]

Originally Posted by pynkphizee

... it turns over it wont catch/turn on,

Does the rev counter needle move when turning over?
If NOT, probably the CPS,
if it moves, probably not the CPS.

If your fuel pump relay is on the relay tray behind the fuses, under the radio, you can open up the console there and wiggle the relay, over the years I've had to replace a couple of those.

[Laird Scooby]

Try your other key BEFORE trying anything else!

Then follow DirtyRoosters advice above.

Also check and if necessary renew fuses 1, 11 and 13 - the blades on them may be dirty preventing the power getting through.