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11th August 2019, 13:13 | #1 |
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V6 will not start
I have decided to hang onto my 2.5 V6 connie auto despite it still refusing to start.
Just to bring the saga up to date the vehicle was parked on the drive following a fault free run of about 20 miles and the following day cranks over but refuses to start. I have carried out the following: New in tank filter with new seals and the modified clip fitted. Crankshaft and camshaft sensors replaced with new components. Fuel pump primes for approximately 10 seconds when ignition is turned on. Fuses checked and tank half full of fuel. Inertia switch checked and not triggered. ECU dry. I have checked at the schrader valve and can detect no fuel at this point and I am fairly certain that no petrol is being delivered. Whatever has broken must have happened during the trip and did not prevent the engine from running but prevents it from starting. Any other suggestions welcome. I have one further question: Can any member recommend a company who could collect my Rover from my home address in Trowbridge and deliver it to MJN Motors in Brislington so that Mark could have a look because I am completely out of ideas. Thank you, Barry. |
11th August 2019, 19:56 | #2 | |
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Quote:
You said earlier that you'd added some fuel to the tank. Was this around a litre or a larger amount? The pump has to be submerged enough to flood the priming valve or it can't pressurise nor transfer. The gauge reading isn't much help here. TC |
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12th August 2019, 08:11 | #3 | |
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Quote:
I know that you are convinced that the cause doesn't lie with the filter but all your evidence suggests that it does, particularly the ten second priming which is much too long. I don't have experience myself of 'fuel filter syndrome' but others who have separated the filter housing report that it is extremely difficult to reassemble it without the seal becoming slightly displaced. I am pleased to read that, despite your arthritis (mentioned in your earlier thread), you have succeeded in renewing the crankshaft and camshaft sensors. With that in mind, this is what I think you should do next:
It is easy to believe that a simple thing cannot possibly be the cause of a problem. More often than not, it is. Simon
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12th August 2019, 12:33 | #4 |
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Thank you both for your replies.
I have added 2 gallons of fuel to the tank and I have timed the priming of the pump at 3 seconds. I will check the operation of the pump whilst the engine is cranking over tomorrow. Very worried about taking out the fuel filter again and hope I don't have to. |
12th August 2019, 14:56 | #5 | |
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That's more like it Barry!
Quote:
Simon
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13th August 2019, 09:19 | #6 |
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I have a feeling that I know what the reply will be but, this morning I put an AVO on the pump connections and had 12 volts for about 3 seconds whilst the pump primed and 12 volts during cranking of the engine and for a brief period when I stopped. I could clearly hear the pump humming during the priming period and for a second when I stopped. Tacho needle is moving slightly also.
Are we looking at a filter problem still. |
13th August 2019, 10:45 | #7 |
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Well Barry, you've replaced the camshaft and crankshaft sensors both of which have the potential to prevent the engine from starting. You've proved that the fuel pump is working and so is its relay. You have petrol in the tank yet no fuel escapes when you briefly depress the plunger in the Schrader valve.
I think the evidence points to the filter assembly don't you? Congratulations on owning an AVO by the way! Simon
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13th August 2019, 15:08 | #8 |
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You mentioned new seals fitted as well as the Fabled Orange Clip. Did this include the thin Oring around the filter cap? The old ones certainly go stiff over the years and even a new one can fail if it becomes displaced or kinked slightly during reassembly. Here's mine (not in the fitted position for clarity):
Only a new Oring will cure this situation. Less than 50psi fuel pressure at the Schrader valve will prevent ignition. TC |
13th August 2019, 17:16 | #9 |
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Yes, I fitted the complete kit which included the large thin o ring under the cover. Pretty sure that I assembled it correctly but I will check it out this week.
I have put a couple of gallons of fuel in the tank but the car is on a steep drive facing down and I am not convinced that the pump pick up is not sucking air. There is no trace of any fuel at the schrader valve. |
13th August 2019, 18:41 | #10 | |
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Quote:
Presumably it would usually start in that position, so I'd have expected two gallons to resolve a possible pick-up issue. Still, who knows. With the pump verified running and sufficient fuel in the RHS there should be fuel at the Schrader valve. No fuel at the Schrader also suggests a blocked line, a blocked filter or the pump ain't pumping. None of these is likely. Leakage of the seal, however, is. But to have no fuel at all at the Schrader is unusual. TC |
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