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General Car Chat / Re: C1 (The skate) serious misfire.
« on: 23 March 2024, 18:53:57 »
Ok, fwiw I think you should look at the lift pump.
I'll bet cylinder 3 is the last on the rail, so any fuel supply deficiency will manifest there as cylinders 1 and 2 take the available fuel first.
As the fuel level drops, the lift pump has to work harder to suck the fuel out so that's when any weaknesses will show. Tbh I think the old fuel is a red herring, it would have mixed when you fill the tank and by driving around so I don't see why it would wait until there's only a 1/4 tank left before it shows an issue.
I'll bet cylinder 3 is the last on the rail, so any fuel supply deficiency will manifest there as cylinders 1 and 2 take the available fuel first.
As the fuel level drops, the lift pump has to work harder to suck the fuel out so that's when any weaknesses will show. Tbh I think the old fuel is a red herring, it would have mixed when you fill the tank and by driving around so I don't see why it would wait until there's only a 1/4 tank left before it shows an issue.