Problem happens before the engine is fully warmed. After warm, no sign of this problem.
The behavior occurs whenever I try to accelerate (pretty much any gear) anything more than very mildly.
Example, engine cold, accelerate half throttle in 2nd gear starting at 1500RPM. Engine begins bucking/kicking/surging and sounds like it's going to stall if I keep it up. It gets pretty violent.
If I left off the throttle slightly (still bucking slightly) and keep the RPMs climbing, at about 2700RPM the behavior stops and it totally smooths out. It's almost like it hits the point where the secondaries open up and that solves the problem.
So...a quick questions about the secondaries. I know they open under WOT, but do they also open if you happen to accelerate lightly and happen to reach a high enough RPM??
I've just recently done the following things:
Replaced both O2 sensors
Cleaned the EGR passages and TB
Verified EGR operation
Replaced plug wires
Replaced plugs AutoLight double plat. .054"
Replaced fuel filter
Air filter is clean
I've been meaning to test the fuel pump pressure, but haven't gotten around to it yet.
Chris
'95 SE MTX 107Kmi.
