Ok - car has been starting easily over the last few weeks including this morning.. It has not been idling very well so I thought I would adjust the idle valve duty settings. Increased the duty settings and the car refused to start. The air fuel ratio value was in the red (not sure of that is relevant). _ it smells very much of petrol-could I have flooded it?
I also seem to get different values when I calibrate the TPS should I be getting a consistent valve?

Any help or suggestions welcome

Thanks

Frank

The varying TPS calibration would tend to suggest something is sticking, either the butterflies themselves or your throttle linkage. This could also explain idle problems!

I don't think the AFR means much until the engine is running. It measures the amount of oxygen that is coming through. If the engine isn't firing then there will be lots of air (and lots of fuel, but it doesn't count fuel, only Oxygen). This is also why rich missfires can give confusing AFR.


Sort your TPS out (the original MegaSquirt 2.25 with Tuning--> real-time display, is probably the easiest way to debug TPS), clean the plugs (maybe gas ring), charge the battery, and try again.

Matt

I
Matt

Actually, MS doesn't use TPS position when starting. The fueling amounts are from the cranking table.

I guess it depends on the type of "not starting", does it fire at all?

Matt