kine462

finally boosted after 1.5 years of research trips to various junkyards. dsm t-25 off a elcipse, d16y8 obd2 obstical.. no check engine lights, but ever so often at partial throttle it will bogg and jerk....my a/f gauge will go from lean to stoich.... when it's running ok (every so oftem)it will ready i green bar past rich?? could it be a fuel problem? faulty injector maybe??

Dr.Boost

I have the same problem right now. In my case it's the fuel. I'm running super rich at idle and leaning out up top. It gets jerky when I try to take off easy. I just try to punch it everytime I take off now.
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kine462

sounds good to me... are you using smc, or afc??when i am cruising partial throttle(vacuum) it will bogg and run way into the lean.. will this hurt since i am not boosting yet?

Dr.Boost

I'm using a custom chip right now. I'm trying to tune it with an AFC, but it only works to a point. I'm waiting for a burner.

It's probably not too good on your motor, but at low rpm and low load it's probably not going to blow your motor up anytime soon. I would try and get it fixed though. What are you using for fuel management?
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kine462

smc dual and 450cc dsm's

Chacko

This potentially could also be the retarded timing, your engine has to take an extra set of revolutions to 'catch up' with itself. This should especially be worse when the engine is being run on a cold start.