sorry.. meant to post on 2.9 fourm...but
thanx for the help. Didn't test it warm, has been sitting a couple of days.
All plugs were out & upper manifold was off. Just wanted a baseline before I went any further or dumped any more cash into the truck. It seems that all cylinders were even across the board so I'm grateful to know I don't have a cracked head or gasket problem.
As far as the vacuum test.. what am I looking for here & what's it gonna tell me ? My truck is running very good , but extremely rich & the mileage is down from 18 to about 8mpg.
Would one (or more) sensor(s) possibly be responsible for this problem ? I've done EVERYTHING except replace the computer.. so now that is my gut feeling.
Do they stay in open loop and run rich if a sensor (or more than one) is not responding...? EEC IV module About to cut the top off the upper intake & heli-arc flanges on each manifold riser so I can mount 3 two bbl carbs if it keeps this up ... LOL A 2.9 with a six pack & Accel distributor
