Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Puff - wheeze... Engine not running. Suggestions?

Bad sights means your fuel air mixture has gone outside the permissible environmental adaptive range. a limit set by s&s.

Ie your ecu wants to add more fuel, but is not allowed to.

This is a common diagnostic warning on cars ive seen. It is only transitory. Sometimes just 1 mile. Sometimes a tank of fuel.

This sounds like a..
fuel pressure: there is a pressure check fitment on the manifold. Check it is 58psi
Kink or constriction in the fuel line
Poor quality fuel. Excessive biofuel content.
Manifold problem
Valve spring
Header stud failure
Injector failure


Does the engine turn over at all?


Does one side combust?
park in the shade and try to start it up for 10 seconds. Is one exhaust hot and not the other???

It turns over = not seized. Fires a couple of times and then "puffs" and dies.

Been going at it alone today, but as far as I can hear both sides fire.

Highest quality fuel you can find here. Shell 99 octane V-Power.

Might be the fuel pump. Will look for a pressure gauge tomorrow.

get a can of spray fuel and squirt it in air inlet (remove filter) while being turned over.

If it runs (albeit briefly) then it sounds like a fueling issue

Those codes are referring to the upstream and downstream Lambda sensors I think

Have a look at http://www.talkmorgan.com/ubbthreads.php/topics/225846/3 very similar issue to you

is some info in this in the VFI instruciton manual 510-0011
which implies that the closed loop offset is at the maximum it is allowed.

(unless you have a crack in the manifold or something or fuel pressure)

Page 13
Map Merging:
If a DTC has been set for front or rear Adaptive Maxed Out it is possible that a map merge needs to be performed. Motorcycles using oxygen sensors
with closed loop fuel control will learn adaptive fuel based on the feedback from the oxygen sensors. These adaptive fuel values apply an offset
to the main fuel table to maintain an air fuel ratio that matches the settings specified by the Target Closed-Loop Fuel Map. There are limits though
to the amount of fuel that can be added or removed by the closed loop fuel system. If the adaptive map values reach the limits of closed loop fuel
control the check engine light will illuminate and a DTC will be set for the related front or rear adaptive maxed out. When this occurs ProTune II can
be used to merge the values of the adaptive fuel control into the main fuel table. This creates a new fuel table and resets the adaptive fuel maps to
allow closed loop fuel control to have the full range of control again.

THE PROBLEM IS THAT YOU CANT DO THAT MAP MERGE. YOU ARE NOT ALLOWED.

A couple of possibilities, i have experienced
Take off the cam belt cover, turn over the motor and watch the three cams to make sure they are moving properly. I had a cam bearing/woodruffe key fail which meant the cam wasnt completely turning or lifting anything. Engine just would not go.

Failed/failing ECU/VFI...engine wouldnt fire/tick over but occasionally would run at high revs/throttle. Auto electrician found that the ECU was firing injectors 4 times at start /low rpm but once at higher throttle. Effectively flooding motor.

Hopefully havent added to the confusion

I'd guess at throttle position sensor failure..

The engine runs with starter gas, so I assume it is the fuel pump. Will try to disassemble and test tomorrow. Dealer and mechanic both on holiday, so no help there.

It was the fuel pump. It put out one to three Bar, which isn't enough. Replaced by the local Morgan shop. In about a week's time, mind you! Kudos!

Attempted it myself with strong will and lots of ambition, but scored too low on tools and knowledge, I'm afraid. At least I got the diagnosis right. *s*

A failed pump after 8250 km? Sheared bobbins after 1000 km?

Who is in charge of procurement and quality control at Morgan??

Bying cheap parts always costs, many has learned that the hard way - some never learns !! Combine that with blindfolded designers and you will have a problem.