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Ed Anderson wrote:
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Normally there is a non-event, there is no hiccup or hesitation – normally! Well this time things were different, the engine started to surge - big time – as did my heart. The fuel pressure is wiggling a small amount but clearly with pressure above 35 psi it is adequate.
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I then turned off my secondary injectors - the engine began to run smoothly (although I don’t know if this was more than a coincident of timing). So recalling my lesson learned from that earlier incident (switch tanks, dummy!), I switched back to the right tank – happily every thing settled down (including my heart) and the engine ran normally.
I am not certain why hitting the “cold Start” switch would have made any difference, but I did turn it on twice and each time the engine settled down. Also when the secondary injectors were momentarily turned off the engine smoothed out.
Ed,
I'm thinking that when you switched tanks, maybe the secondaries got the bulk of the slug of water?
When you switch on "cold-start" you increase the pulse width to all injectors, right? When you turn off the secondaries, there was probably little to no water in the feeds to the primaries. So, either one results in a higher fuel to air ratio, making the engine run better. Eventually, the water is either consumed or so thoroughly dispersed in the fuel (including some in the other tank, since you switched back) that it has no noticeable effect on the running. Check your tanks this afternoon.
Dale R.
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