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I screwed up - Bosch VE pump.

70herald

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Well to try and stop a big fuel leak on my Nissan Serena. (LD23 diesel Engine) I eased off the back of the pump to replace the o-ring between the aluminium body and the cast iron head (part where the high pressure pumps are and the outlets to the injectors. THAT part went OK I think (nothing escaped and it all went together easily)

but now I have 2 problems:
1 the pump won't prime.

2 Trying to get to the head I took off the accelerator and top plate but now the "idle mixture" potentiometer may not be set properly - WHAT is an Idle mixture control on diesel engine? diesel has the air fully opened and all control is from the amount of fuel injected. Any ideas?
 

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70herald

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OK I finally got it to prime and realized that I put the accelerator arm on a bit rotated so it wasn't opening the throttle at all. Now it starts. warm and cold idle are high but that is just two screws, probably full power will be a bit low. That will be a pain since it has a tamper nut.

Still trying to figure out what the potentiometer does.. (doesn't seem to do much actually)
 
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