On 1/20/05 8:22 PM, "Damon Campbell" <damoncampbellvw@YAHOO.COM> wrote: > Hello wise and all-knowing list... i have a troubling > question (to me) to pose (to you). > > Currently, my '84 westy is running a 2275 WBX. Stock > pistons, stroked to 82mm, and running big-valve heads. > Fuel injection is stock 1.9 Digijet. The problem is > that it ironically lacks power, and has little (and > sometimes NO!) power when accellerating from a dead > stop. > > I have the digitool hooked up, and primarily it is > telling me that the engine drops full lean when coming > off that dead stop (or just really low RPMs). This > can last 10 seconds or so, until it ever so gradually > creeps up in speed. To get around this, i've been > working the clutch to keep above the seemingly magic > 2k rpm range where it really perks up. > > For general drivability, once i get going, the van > surges under moderate to heavy throttle. It is smooth > (and seems happier) at very light throttle. O2 sensor > oscillates around .5V, unless you goose it, at which > point it generally dips lean, but readjusts to .5V. > If you disconnect the O2 sensor, the surging goes > away, but it loses even more power. > > I've checked the FPR, which seems good. The injectors > are recently serviced, and a vacuum leak check showed > no leaks (used propane to see if the idle rose). The > O2 sensor has about 6k miles on it. > > The kicker is, the AFM adjustments are completely out > of whack (spring and idle). This has been tweaked on > (initially by BusLab down in Berkeley, CA), and now > vainly by me in an effort to trick the 1.9AFM into > liking the 2275. > > Other possibly useful information is that on a > previous (and similar) engine to this one, it was > dialed in and ran like a bat out of heck. > Unfortunately it died (my build error), so this is > it's replacement. All FI components are the same, so > i am pretty sure i should be able to get this to work. > > Do any of you have some advice on things to check for? > I am getting quite worried, as my parents are coming > to borrow the van for a month as they drive from > Vancouver, Canada, down to Arizona, and i don't want > to stick them with a lemon. It would probably make > it, it just wouldn't be any fun. > > Thank you for any insight you may give me, > -Damon > > ===== > '84 Westy (Sparky) w/2.3L WBX > Vancouver, BC Start with a vacuum leak and AFM response. •••••••••••••••••••••••••••••••••••••••• jimt Planned insanity is best. Remember that sanity is optional. http://www.tactical-bus.info (tech info) http://www.westydriver.com |
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