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Jun 14th, 2026
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Joined: Dec 2009
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Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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Posts: 37,405 Likes: 977 |
Rolsmith
I once had a very similar issue but on a very different car. Turned out to be the crank sensor.
Have you since driven car for any duration to see if fault re-occurs. On mine it did, and in fact it took me nearly four hours (for a 45 minute journey) to get home as the car was stopping every 5-10 minutes. I'd then have to then wait another 5-10 minutes before I could drive it again.
Cheers
I had this on a Polo GTI I had forgotten all about it, car ran perfectly between failures.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Jun 2012
Posts: 508 Likes: 1
Dreiradschubser Talk Morgan Regular
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Dreiradschubser Talk Morgan Regular
Joined: Jun 2012
Posts: 508 Likes: 1 |
you have checked the security switch for the fuel pump?
4 aircooled cylinders, 7 tires, not waterproof: my m3w Bluebelle (2013) and my 2CV Gundel (1990)
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Joined: Feb 2011
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Member of the Inner Circle
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Member of the Inner Circle
Joined: Feb 2011
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you have checked the security switch for the fuel pump? The inertia switch? Crossed my mind that might be the cause.
Jays
Former Morgan owner. Gone but hopefully not forgotten!
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Joined: Feb 2014
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OP
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I was not aware that my fuel pump had a security switch. Where would this item be located? Since the M3W has an ECU, does anyone know if it captures fault codes?
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Joined: Feb 2014
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Always sit in the cockpit when you start the car, otherwise you can miss stuff... Like engine check lights. I have a check light that comes on when I bring the engine off idle. Low fuel pressure? Anyone have the magic formula for fault codes?
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Joined: Aug 2011
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Always sit in the cockpit when you start the car, otherwise you can miss stuff... Like engine check lights. I have a check light that comes on when I bring the engine off idle. Low fuel pressure? Anyone have the magic formula for fault codes? There is a thread about reading the ECU. All you need is to download the free software (ProTune) from the S&S website and connect a PC to the ECU ( S&S call it VFI ) using a USB to mini USB cable. My cellphone cable works. Sorry, at work now so havent the time to search it out for you. EFI unit is under the fuses right hand side when looking to rear of car and socket is covered by small rectangle plate with two super small allen screws You can read and clear codes etc etc cheers nigel
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Joined: Feb 2014
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Thanks Nigel,
I will follow up on the ECU thread. There is also a pressure port located on the right hand injector. It is a schrader valve and it should read 58 psi according to S&S. I should be able to read the system pressure with an AC guage that I have. I'm really hoping for a marginal fuel pump vs an unknown intermittent failure.
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Joined: Aug 2011
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Thanks Nigel,
I will follow up on the ECU thread. There is also a pressure port located on the right hand injector. It is a schrader valve and it should read 58 psi according to S&S. I should be able to read the system pressure with an AC guage that I have. I'm really hoping for a marginal fuel pump vs an unknown intermittent failure. when i had a sudden engine stop, the AA man removed this. It sends a real good squirt of petrol into the air, Dont put your head over it else you get an eyeful !! I have three dead stop events. One when both plugleads came off simultaneously !!??? Second was a broken cam belt and third was a broken cam bearing. This was tricky to find as the belt looked fine. Had to watch whilst turned motor over to see the eccentric movement of the broken cam bearing/keyway. On my own i had to set up a video cam looking at cams whilst i hit the starter motor. There is a accident fuel cutoff switch which is just under the oil tank. Maybe this is a bit touchy/sensitive if you hit any bumps at speed cheers nigel
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Nothing is ever easy with these cars. For some reason, my wife's new windows 8 box would not do the "discover new hardware" bit so that I could load the USB driver for the S&S ECU software. I fussed around for about an hour wishing that this stuff ran on a Mac in native mood and then I tried her old win 7 machine and it all came together. I had two fault codes (P0170 and P0172) which are readings for the right and left fuel injection adaptive maps being "maxed out". According to the S&S manual, these fine tune the injection system and smooth things out.
This makes sense from the point of view that the fuel pump motor sounds marginal and I get a fuel pressure reading of 22 psi instead of the 58 psi the S&S shop manual says I should be seeing. The adaptive function just can't quite make up for a missing 36 psi.
Long story short, I ordered a new fuel pump from my dealer. In the mean time, I'll make a stiff drink, position a folding chair in just the right position and gaze admiringly at the fine British coachwork!!
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