Quote:
Originally Posted by Spanky1965
thanks Tom, the funny thing is there IS a big diff, not even close. also the vac pump runs for 3 sec and does not cycle on and off so i am assuming no vac leaks
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Ok, so no huge vacuum leaks. That's good.
Narrows it down a tick.
Your secondary actuators could be sticking and then opening later than they should. That would cause a mid rpm bog as the fuel mixture goes rich and then once they're open, the power comes back as the mixture leans out.
It could be fuel injectors, if you've got secondary fuel injectors that aren't flowing like they should, it could cause a bog.
Coils can cause stumbling problems, check out this 3 year long horror story:
http://www.zr1netregistry.com/forum/...ead.php?t=1777
Doesn't sound like your problem though, my first guess would be fuel injectors, secondary actuators next.
TomC
"Crabs"