Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Protune2 diagnostics

A bodge suggestion: As Torx bits taper from their nominal size to that of the shaft, you can carefully grind down the end of a T15 until it just fits into the fastener. Then dress the end of the bit so the flutes are parallel sufficient for the bit to fully engage the fastener.

I guess I was lucky getting the anti tamper screws out of the TPS with a T15 bit. I suppose they are, "anti tamper" so a weird size is "anti tamper".

That is not good, cracking fuel hose on a fairly young car like yours. Certainly worth checking the injector hoses next time the fan is off. I have braided hoses fitted, so it's not easy to see the hose condition, a positive or a negative? I am sure you know but the fuel hose is in the APL, Cohline 2240.0600.

Thanks Ian and new hose is on it's way from Merlin Motorsports. I thought about the braid covered hose but in the end stayed with the reinforced rubber. Primarily as it's easier to spot cracks without the braid.

I think MMC must have used old stock hoses on my car as it had a new oil hose at the first service (about 3 months) and another one when Craig fitted the Centa (6 months).

Re the TPS I'll either attack it with a screwdriver or, more likely, ask Craig to do it when it's in for a service & MOT after Goggles & Gauntlets.

For info a Torx 20 did the job

I took a bit of tweaking to set the position but eventually got it to 10% throttle and 0.32 volts.

I concur - the original (cheese) screws are Torx 20. Now replaced with stainless steel M4x12mm socket head ones.

I know it is a bit obvious but S&S ProTune2 is a very useful tool for diagnostics. Even if, like me, you are not that good with the technology and a bit reluctant to try it, it is worth connecting a laptop to the ECU, checking the fault codes and testing the outputs if you have a problem.

A friends M3W engine suddenly went to very rough running and was difficult to start requiring some throttle to get it to start at all, usually you never touch the throttle on starting. On running ProTune2 there were several historic fault codes but no current ones. We cleared them and tried to run it again to see what came up, nothing shown after a few spluttering seconds of running.

You can access less with a locked ECU than you can with an unlocked one, no bad thing normally as that makes it almost impossible to do something wrong. This one was locked. You can still access the “Test Outputs” from the Options Menu. For those that have not used this feature it allows you to check the ignition on both cylinders one at a time, it sparks a plug held against the cylinder for 5 seconds. Fuel injectors can be run independently for 5 seconds, you can hear them or remove them and spray the petrol into a jar to check the spray pattern. The fuel pump can be run for 5 seconds and you can check the pressure with a gauge at the test point at the same time. The Idle Air Control can be motored open and closed. You can also test the Tacho, ECU and Check Engine Lamp. It doesn't test everything, Throttle Position Sensor, Manifold Absolute Pressure, Air Temp and Crank Position are not there but it does check the fuel and sparks are there.

All the tests passed apart from the Idle Air Control Valve that “failed test” consistently, it also sounded rough when motoring. A new Harley Davidson IAC p/n 27628-01A was ordered. Once fitted it all fired up and ran perfectly. I know it's not always that easy but at least you can test a few things easily with ProTune 2.