Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Fuel pressure ?

Dear folks

Does any one of you know reliably what should be the normal fuel pressure of our Threewheelers measured at the testing connector near the right hand cylinder?
Or did one of you messure the pressure at a vehicle which is running as intended?

Since about 200 miles I am facing severe problems with my engine.
Lots of errors present in my ECU (P0170, P0173, P0105, P0108, ....)
If you open the trottle by more than estimated 10% the engine is dying, if you do not release the pedal, which seems to be caused by a to lean mixture. I am assuming that the enriching when opening the throttle is not working properly.

Vacuum/barometric sensor was swapped against new ones for testing purposes, but no effect, neither on ECU nor on engine behaviour. Intake section check for air leaks, no findings identifyed. Fuel pressure on the test-valve showing 1,5-1,8 bar / 22-26 PSI.

IMHO this seems to low to allow the injectors to create a proper spray picture and might be the reason for a restricted flow rate rsulting in to lean mixture.

Is there any advice, what could by checked/measured directly at the fuel pump (voltage, resistance, ...)?
Checked the crank pulley of the beltdrive as well. It didn't come loose so far, so the cam timing should be OK.
Wiring checked, seems to be in proper shape, connectors in ideal shape, no visible damages to the looming.
I hope I am not facing an dying ECU.

Last remark:
The reported effect developed more and more significantly over the last 600
Km, first popping in above 75% throttle once in a while, now drivable between 0 and 10% load and rpm range 3-4 thousend.

Logged so far 8.000km

Does the pump sound ok for about 4 seconds when you turn the ignition on? Should be about 85 PSI from memory - sounds very much pump related

Could be fuel pump.
Did you run tank nearly dry at any time?

My tank was full of swarf when inspected at fuel pump change. However the fine mesh filter on the pump should stop this from being a problem.
I did run out of fuel not long before my pump gave up the ghost. I am thinking overheating of the pump may cause premature failure.

Spelunx, the fuel pressure should be 3.5bar. sounds like fuel pump.

I made the following note in my personal service manual from a previous discussion on this topic:

'If there is just under 60 psi at the injectors then the fuel pump is putting out the required pressure. The S&S book calls for 58 psi.'

Yup, 58 PSI.

It sounds like your fuel pump is dead, or dying, I'm afraid.

Mine did the same before it perished. I had fault codes 0170 and 0172, if I remember correctly.

Have seen mentioned fuel pressure stated by S & S as 58 psi. Your measured pressure sounds way too low. Could you try another fuel pump?

FWIW fuel injectors are spec'd as: 34.8 lbs/hr @ 3 bar fuel pressure.

Assuming it is the pump, this might be the prompt I need to add one to my ever growing spares bag. Does anyone have a link to the replacement we need to buy please?

Thanks.

Fuel pump harness connector airtex IP 1271
Delphi electric fuel pump FE0113
Î dont find the post on this forum
For the installed instruction