Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Engine check light question

I'm on a road trip and away from my windows box at the moment and can't check the ECU. I have an engine check light that started after refueling. I'm pretty sure I overfilled the little beast and upset it's evaporative system. The light stayed on through the next fill up, was about 50/50 during the next fill up and now is off about 80% of the time on the third fill up. Does this sound normal for screwing up and overfilling?
On the plus side, I'm now just over 10,000 fairly trouble free miles!!

Did you get any rough running after refueling? I got that & the light after overfilling but roughness soon cleared & the light went out after a few miles. Had same once since & one occasion of engine light but never on for very long. So possible something else.

Tim

You don't mention what car? Assuming your in a Trad this is totally normal, the rough running is the car breathing fuel rather than fumes from the carbon canister when the purge valve opens, it will clear. To reset the light (but the fault code stays in the ECU as a multiple misfire) you need to repeat drive cycles....memory says 5 cycles and don't worry about copying them exactly normal driving does it but it's something like....

Start and idle for 30 seconds
Drive to above 30 MPH
Idle for 30 seconds
Drive to above 50 MPH
Idle for 30 seconds
Switch off, wait 2 min and repeat above.

If the light is going out and coming back on there is still some fuel in the canister and it can take a day or two of stop start heat cycles to get the purge valve open enough to clear it out. I stripped mine out (2002 +8) when I had a car suffer this in the southern part of France, had I known it would self clear I would have avoided a filthy mess....I did it a year later in Germany, or rather a petrol station guy did when he washed the back of the car with fuel! and I left it to self clear that time and it took a couple of days but all was fine. Never happened again in a further 6 years ownership.

Rol has a Three Wheeler Colin, but your reply may still be pertinant. I overfilled my old Three Wheeler on a couple of occasions, and whilst it would not run properly, and I had to remove the lockable insert in the cap, I didn't ever get a fault light showing.

Thanks, the car in question is an M3W and it did run rough after it happened, runs fine now. We have about 450 miles to go today to get home, hopefully it will have cleared by then. I will still hook up and read the fault codes.