engine bogging down when coming off throttle

[toseland]

Ok.. symptons..


when you give it the beans, if you let it drop off of the loud juice and fall back to idle itll bog for a split second (like you try to pull away in the wrong gear), chug once or twice, before filling itself back out to a nice smooth idle..

its as if the revs fall a little too far then pick back up again.




Bosch pump
LDA ground (although i am not sure how aggressively)
Gov. modded

no smoke when idling but some on full boost, fiddled with the compensator to reduce this and now it only coals if i mat it out of boost...

other than this it runs sweet as a nutt..



any ideas?

[Dave]

Two issues,

either your pump is emptying due to lack of fuel supply to it, or your anti-stall spring is not setup properly and not kicking in when your idle drops too low.

[toseland]

it will likely be the anti stall spring as i have new 3/8ths fuel pipe throughout...


where be le antistall spring and how to set it up!?