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Post by wings on Feb 3, 2024 17:16:57 GMT
Greetings
I am owner of MEV SONIC 7 2010 Reg
FJ60FXY
I bought it without any builder notes, details.
Now l had a driveshaft shatter with a very loud bang and
Serious vibration. The engine quit.
On replacing driveshaft. No start condition.
Turns out no fuel from pump supply.
I suspect fuel inertia cut off switch.
I have no idea location of it after looking forever.
Any please help how to find?
Thanks in advance
Take it easy
Wings
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Post by wings on Feb 3, 2024 17:20:33 GMT
This is Wings
You can also respond to my email
Wingstalysis@hotmail.co.uk
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phaeton
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Thinking of Supercharging
Posts: 170
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Post by phaeton on Feb 3, 2024 18:35:23 GMT
Follow the wiring, as with any kit it's down to the builder where put things
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Post by kiwicanfly on Feb 3, 2024 19:21:50 GMT
Also there is no guarantee that there is one.
I am also curious abouth correlation between a failed drive shaft and interia switch.
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phaeton
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Thinking of Supercharging
Posts: 170
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Post by phaeton on Feb 3, 2024 20:36:11 GMT
I am also curious abouth correlation between a failed drive shaft and interia switch. If the car was shaking so much it could have tripped the inertia switch, we used to track day a Saxo, if you hit the kerbs too hard it would occasionly shut the engine down, resetting the switch would get it going again. |
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Post by kiwicanfly on Feb 3, 2024 21:08:15 GMT
Ah, I also missed the "no fuel" comment, does make sense now.
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Post by buildityourself on Feb 3, 2024 21:39:36 GMT
Post some pics under the covers.
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Post by wings on Feb 4, 2024 18:04:17 GMT
Greetings Thanks guys for sharing. Good point.. it may not have an inertia cut off switch. Yes the builder. Guy l bought from who is second owner visited me today and that question stated never got any build info on purchase. And l thought l was a fool! So today l forced myself to remove copilot sea, fuel tank cover Behind that seat. Removed fuel pump and to multi plug connector only 2 wires to pump. I supplied 12 volts to correct wire, grounded the the other one. Pump came to life, and engine ran. So to heck concern about shut off inertia switch. I’m just going to wire in my own on off switch via my master power on off switch. I just wonder if the pump is supposed to stay running without stopping. Is that safe? I don’t know as a fuel injected engine has pressurised fuel tank by pump?  Am l safe..? Cos pump doesn’t go off unless l disconnect from power! Comments please? |
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phaeton
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Thinking of Supercharging
Posts: 170
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Post by phaeton on Feb 4, 2024 18:59:33 GMT
I would have thought the pump would be controlled by the ECU not just a simple switch, usually the pump will prime, get up to pressure, cut-off & then only cut in out as per by the fuel pressure regulator.
***NOTE 1*** This is general, not specific to your engine or setup,
***NOTE 2*** You DO NOT want a pump to continue pumping in the event of an accident
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Post by buildityourself on Feb 4, 2024 20:08:03 GMT
Why not just keep looking for the cut off switch, it does sound like the issue and the safest solution.
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Post by kiwicanfly on Feb 5, 2024 4:30:11 GMT
If there is a cut off switch it "has" (of course I could wrong) to be between the pump and ecu.
Even if you can't see a switch or would have to remove lots of things (panels, tunnels etc) finding the pin out from the ecu should allow you to check that circuit with a multimeter (or even a battery and bulb). If the cut off has tripped that will confirm.
In fact if you are really lucky the wire to the pump will be a unique colour and thus easy to spot on the ecu.
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phaeton
Full
Thinking of Supercharging
Posts: 170
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Post by phaeton on Feb 5, 2024 7:38:59 GMT
I know nothing about Rockets, but do they run a standard loom or a bespoke one? my Mexster runs a bastardised MX5 so you can still use the standard wiring diagrams to follow most of it. Is this the case with the Rocket, even if it's bespoke it must follow the same connections I would have thought, is there an inertia switch on the donor wiring diagram?
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Post by mawdo81 on Feb 5, 2024 11:06:16 GMT
In the original focus, the inertia cut-off switch is located between the Fuel pump relay (which is controlled by the ECU) and the FP. It should be a green wire with an orange tracer, that said it will be covered in black sheeting (assuming the builder used the Focus loom). In the Focus it was at the base of the right hand A pillar. In MY Sonic its in the centre tunnel adjacent to the gear shift - this was to minimise the likelihood of it triggering by hitting a single bump with a single wheel.
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Post by carlyd on Feb 5, 2024 15:22:34 GMT
Could the fuel pump relay have blown? sounds like an easy thing to check.
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Post by wings on Feb 6, 2024 11:29:01 GMT
Thanks guys,
Really appreciated all inputs. I’ve decided to call in a mobile expert mechanic.
I will update hopefully soon
Take it easy
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