Quote:
Originally Posted by spuggy
Fitting two pumps - in series - if one will do the job increases, not reduces, the chance of failure.
What happens if a pump dies? Exactly the same as the overboost protection kicking in. You have a pump forcing gas through a dead pump. Or a dead pump at the tank restricting flow to the good pump. You're in limp home mode.
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Or the car goes lean and you toast your engine.
I remember that VW had some issues with tank pumps going bad in their Golf MKII cars. The cars would go lean and die. I would hate to see the AFR when that happened under boost. I guess a fuel gauge with a low pressure warning light would remedy that though.
Thanks again for the input.