Slack in bosch pump?

[Martin306]

Nah it was a guy in his mid thirties, but I don't think he was using it much, if at all, and the fuel was well on the light.

Here's another observation-- the car does not slow down too well when you lift off the throttle.  I was driving my zx today, and if you back off the gas suddenly, the car wants to nosedive and you'll be stopped in no time.  The 405 slows really gradually.  This could be normal, but I'd expect 2 1905cc diesel engines to slow down at a similar rate.  Yeah the 405 is 150 or so kg heavier, but it also has a higher compression ratio and lower gear ratio so I'd expect them to slow at the same or similar rate.  This being said, it's just bugging me a little, making me think it's something to do with the way the pump is set up.  Zx pump is untouched, all factory paint and collars intact.  Anti stall mechanism on 405 fuel pump is adjusted back as it was a little keen, making the engine rev when changing down gears from low revs.  Idle is fine on both cars, nice and smooth and when revved at idle, the 405 takes a little longer to settle down to idle.

Its not undriveable at all, just an observation, making me think I may have altered something incorrectly, or is the zx just mega aggressive with fuel cutoff

405's used to come with big dampers on the fuel pump, looks like a fat gear linkage. it slows the rate that the arm closes the throttle at.

if the ZX has one as well, it could be that it has failed. so it allows the throttle to snap shut.