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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Ongoing no start 940 and other woes!Views : 4627 Replies : 120Users Viewing This Thread : |
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Jul 3rd, 2021, 10:37 | #1 |
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Ongoing no start 940 and other woes!
Some of my 940 (93) woes….and a car that no longer starts and has been SORN’d since Xmas.
- Car always had too slow idle and would stall or struggle left idling without extra revs, I never found a solution. - Speedo only works after about 10-15 mins driving then works perfectly! - Sunroof leaking, door channels are clear. Think the metal frame is bent so the water isn’t getting to the channels. - Heater control too stiff to work via dash control but heater works if you manually turn in the footwell. No leaks at the moment…would love a new valve but missed the last one on Ebay that went for £80. - Car seems to be drawing amps/power all the time, when parked and ignition off. About 0.25A which is enough to flatten the battery without regular use. I leave it disconnected now. - At Xmas we went to move to move it, started, failed and never started again. Have had no time to investigate any of this but have been getting the spanners out the last few days. Have spark New battery, new plugs New crank sensor ¾ tank fuel Both pumps spin (Bosch not regina) New pressure regulator ordered. Fuel pump relay works as it should but we don’t seem to have fuel to the engine. Will attempt to start with a squirt of brake cleaner. Today I’m aiming to test for clogged fuel filter and change the filter. Tried last night but could not get it off! It’s in cradle under the car, 3 x 13mm bolts on the cradle which houses the pump and filter. 2 x 10mm bolts seem to hold these to the cradle, one spins and the other isn’t releasing the strap clamp. Maybe I’m missing something. Oh and the handbrake cable is snapped but it's an auto and I don't care for the moment lol. Any guidance would be very welcome. It's gone from flying through an MOT 18 mths ago to all sorts of trouble, lovely drive when it works! Last edited by vickyg; Jul 3rd, 2021 at 10:43. Reason: Add year |
Jul 3rd, 2021, 12:47 | #2 |
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You would do best to narrow the problem down to fuel or ignition before throwing parts at it.
Are you getting fuel pressure at the rail? If there is a schrader valve underneath the rail between 1 and 2 injectors measuring the fuel pressure is easy with a cheap fuel pressure gauge. Get one with a flexible hose that will be suited to the clearance available. The petrol may have deteriorated if the car has been standing a long time. Standard unleaded contains ethanol (because eco-morons think green-washing transport is a good use of the world’s agricultural resources) and this alcohol both oxidizes and absorbs water giving it a usable shelf life of about three months. I found a useful additional test of the fuel system was to remove the short piece of rubber hose in the fuel return line after the pressure regulator and attach a longer piece that you can route into an empty jerry can. Not only does this help, in conjunction with a pressure gauge, to prove the pressure regulator it also enables you to check the state of the fuel getting to the engine without having to dismantle any high-pressure unions. That cradle under the car it a horrible thing. I used an impact wrench on the bolts and was able to dismantle mine ok. But I had trouble with the banjo connectors and broke the fragile, short hard-plastic fuel line. You will need replacement crush washers. See my thread from a few years ago for details of part numbers and issues with these. https://www.volvoforums.org.uk/showthread.php?t=287217 |
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Jul 3rd, 2021, 13:18 | #4 |
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Sun roof leaking
Is it a glass or metal type. The glass type can rust where seal presses on, it's not galvanized like the rest of the car. A good bodge is to seal the glass on the top between the seal and the glass, just a small bead if black silicone. In my case the water made its way around the inside of the seal and dropped into the slider channel which isn't drained. Also worth pouring some water into the drain and checking the drain is working. |
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Jul 3rd, 2021, 14:55 | #5 |
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Have found far worse cause, fuel tank full of water. The drain in the filler was blocked and we've had serious rain. Can I safely use the pump to drain the tank into a bucket? I hope this hasn't written off the engine 😭
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Jul 3rd, 2021, 16:28 | #6 |
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Totally mystified, pulled a hose and so far nearly 15 litres of water. Find it hard to believe this got in via the filler cap in the rain. Sabotage?
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Jul 5th, 2021, 08:09 | #7 | |
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Jul 5th, 2021, 08:47 | #8 | |
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Repeat the seal greasing fortnightly for 2 months then monthly for 3 months then leave it 3 months, again after another 6 months then do it yearly as a service item.
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Jul 5th, 2021, 09:21 | #9 | |
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