Blackbird engine cutting out - fuel pump?
martyn1137 - 15/9/12 at 07:34 PM
Your help please guys, firstly in identifying the fuel pump, which we think is faulty causing the engine to cut out.
Description
The car is an MK Indy, now with a Blackbird engine previously a Ford crossflow we suspect. There is no marking on the pump at all.
Any idea of make or what it is from? What does anyone else use?
The issue we have appears to be two-fold. Recently the engine would stall when taking a sharp right-turn, i.e. into a junction. This we thought was
perhaps the tip sensor off the bike, which is still in the loom having been put back in the wrong position (the car has been partially re-built).
Having checked the tip sensor, and re-positioned it, it ran ok for about half a mile, (no right turns) but then developed a dreadful cut out. It will
die for a couple of seconds, then come back to life, only to do the same repeatedly. With the previously mentioned right-turn issue, it is necessary
to turn the ignition off then on again for the engine to start again, but not the straight line cut out. That’s why we believe this issue is maybe
fuel related whereas the other would appear to be electrical. Any thoughts or ideas?
big_wasa - 15/9/12 at 07:43 PM
bosch "style" lots of generic copies about. Mine looks identical but blue. £20 new on fleabay.
maccmike - 16/9/12 at 01:50 AM
bypass the lean switch for a start.
is it carbed? just try another pump.
look for shorts too.
big_wasa - 16/9/12 at 08:08 AM
is it carb or injection ? your pump looks like a high pressure inj pump.
britishtrident - 16/9/12 at 09:29 AM
Sounds much more like a wiring issue to me, check all the connectors and earths .
martyn1137 - 16/9/12 at 11:55 AM
Thanks. It's an injection engine.
I think we will try another pump first off.
Has anyone removed the tip sensor off the bike loom and know which cables to join/cut? There is little point it being on the car.
rusty nuts - 16/9/12 at 12:20 PM
Check for broken/damaged wiring first, I have had a couple of Galaxy/Sharans etc with similar symptoms, one would cut out on right hand turns and the
other would only drive backwards both due to broken wires
maccmike - 16/9/12 at 03:31 PM
buy a haynes, it'll be pretty simple to bypass.
britishtrident - 16/9/12 at 05:51 PM
quote:
Originally posted by martyn1137
Thanks. It's an injection engine.
I think we will try another pump first off.
Has anyone removed the tip sensor off the bike loom and know which cables to join/cut? There is little point it being on the car.
The key with fault finding is work logically testing where possible not to start by swapping parts at random especially if you start with the
least likely part.
The cutting out on right hand turns is big clue, especially if the tacho suddenly dips to zero before the engine crank completely stops
turning it points to a electrical connection issue. Very often this type of symptom is present then the crankshaft sensor is failing. Crankshaft
and cam sensors often suffer from intermittent internal connection problems after major work has been done that in anyway disturbed the engine or
the sensor wiring.
The tip sensor is just a tilt switch, if you want rid of it just by-pass the switch terminals.
To test the fuel pump just monitor the fuel pump pressure, but generally even on injection system if the pump fails the engine won't cut
instantly. If it is fuel pump related then the wiring or pump relay is the place to start investigating rather than the pump.
[Edited on 16/9/12 by britishtrident]
